rich1.0phorkiehttps://p.cweiske.de/phpdoc strpos reStructuredTextChristian Weiske86400900900<!-- embedding all files of https://p.cweiske.de/51 -->
<link rel="stylesheet" href="https://p.cweiske.de/css/embed.css"/>
<div class="phork" id="51">
<div class="phork-file">
<div class="phork-content">
<div class="document">
<div class="section" id="synopsis">
<h1>Synopsis</h1>
<p>Find the position of the first occurrence of a substring in a string</p>
</div>
<div class="section" id="description">
<h1>Description</h1>
<div class="system-message">
<p class="system-message-title">System Message: ERROR/3 (<tt class="docutils"><stdin></tt>, line 8)</p>
<p>Unknown directive type "signature".</p>
<pre class="literal-block">
.. signature::
int function strpos(
string $haystack,
mixed $needle,
int $offset = 0
)
</pre>
</div>
<p>Find the numeric position of the first occurrence of <tt class="docutils literal">$needle</tt> in the
<tt class="docutils literal">$haystack</tt> string.</p>
</div>
<div class="section" id="parameters">
<h1>Parameters</h1>
<dl class="docutils">
<dt><tt class="docutils literal">$haystack</tt></dt>
<dd>The string to search in.</dd>
<dt><tt class="docutils literal">$needle</tt></dt>
<dd>If <tt class="docutils literal">$needle</tt> is not a string, it is converted to an integer and applied as the ordinal value of a character.</dd>
<dt><tt class="docutils literal">$offset</tt></dt>
<dd>If specified, search will start this number of characters counted from the beginning of the string. Unlike <a class="reference external" href="function.strrpos">FUNCTION:strrpos</a> and <a class="reference external" href="function.strripos">FUNCTION:strripos</a>, the offset cannot be negative.</dd>
</dl>
</div>
<div class="section" id="return-values">
<h1>Return values</h1>
<p>Returns the position of where the needle exists relative to the beginning of the <tt class="docutils literal">$haystack</tt> string (independent of offset). Also note that string positions start at 0, and not 1.
Returns <a class="reference external" href="false">FALSE</a> if the needle was not found.</p>
<div class="warning">
<p class="first admonition-title">Warning</p>
<p class="last">This function may return Boolean <a class="reference external" href="false">FALSE</a>, but may also return a non-Boolean value which evaluates to <a class="reference external" href="false">FALSE</a>. Please read the section on <a class="reference external" href="language.types.boolean">Booleans</a> for more information. Use <a class="reference external" href="language.operators.comparison">the === operator</a> for testing the return value of this function.</p>
</div>
</div>
<div class="section" id="examples">
<h1>EXAMPLES</h1>
<div class="section" id="using">
<h2>Using _===_</h2>
<div class="system-message">
<p class="system-message-title">System Message: ERROR/3 (<tt class="docutils"><stdin></tt>, line 47)</p>
<p>Unknown directive type "code".</p>
<pre class="literal-block">
.. code:: php
<?php
$mystring = 'abc';
$findme = 'a';
$pos = strpos($mystring, $findme);
// Note our use of ===. Simply == would not work as expected
// because the position of 'a' was the 0th (first) character.
if ($pos === false) {
echo "The string '$findme' was not found in the string '$mystring'";
} else {
echo "The string '$findme' was found in the string '$mystring'";
echo " and exists at position $pos";
}
?>
</pre>
</div>
</div>
<div class="section" id="id3">
<h2>Using !==</h2>
<div class="system-message">
<p class="system-message-title">System Message: ERROR/3 (<tt class="docutils"><stdin></tt>, line 67)</p>
<p>Unknown directive type "code".</p>
<pre class="literal-block">
.. code:: php
<?php
$mystring = 'abc';
$findme = 'a';
$pos = strpos($mystring, $findme);
// The !== operator can also be used. Using != would not work as expected
// because the position of 'a' is 0. The statement (0 != false) evaluates
// to false.
if ($pos !== false) {
echo "The string '$findme' was found in the string '$mystring'";
echo " and exists at position $pos";
} else {
echo "The string '$findme' was not found in the string '$mystring'";
}
?>
</pre>
</div>
</div>
<div class="section" id="using-an-offset">
<h2>Using an offset</h2>
<div class="system-message">
<p class="system-message-title">System Message: ERROR/3 (<tt class="docutils"><stdin></tt>, line 87)</p>
<p>Unknown directive type "code".</p>
<pre class="literal-block">
.. code:: php
<?php
// We can search for the character, ignoring anything before the offset
$newstring = 'abcdef abcdef';
$pos = strpos($newstring, 'a', 1); // $pos = 7, not 0
?>
</pre>
</div>
</div>
</div>
<div class="section" id="notes">
<h1>Notes</h1>
<div class="note">
<p class="first admonition-title">Note</p>
<p class="last">This function is binary-safe.</p>
</div>
</div>
<div class="section" id="see-also">
<h1>See also</h1>
<ul class="simple">
<li><a class="reference external" href="function.stripos">FUNCTION:stripos</a></li>
<li><a class="reference external" href="function.strrpos">FUNCTION:strrpos</a></li>
<li><a class="reference external" href="function.strripos">FUNCTION:strripos</a></li>
<li><a class="reference external" href="function.strstr">FUNCTION:strstr</a></li>
<li><a class="reference external" href="function.strpbrk">FUNCTION:strpbrk</a></li>
<li><a class="reference external" href="function.substr">FUNCTION:substr</a></li>
<li><a class="reference external" href="function.preg_match">FUNCTION:preg_match</a></li>
</ul>
<!-- this here would be autogenerated from the file list, or in an include similar to global.ent: -->
</div>
</div>
</div>
<div class="phork-meta">
<a href="https://p.cweiske.de/51/rev-raw/a35f5f61bc0f791b8fe6053e9421f2716510fa64/function.strpos.rst" style="float: right">view raw source</a>
<a href="https://p.cweiske.de/51#function.strpos.rst">function.strpos.rst</a>
</div>
</div>
<div class="phork-file">
<div class="phork-content">
<style type="text/css">/**
* GeSHi (C) 2004 - 2007 Nigel McNie, 2007 - 2008 Benny Baumann
* (http://qbnz.com/highlighter/ and http://geshi.org/)
*/
.xml .de1, .xml .de2 {font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;}
.xml {font-family:monospace;}
.xml .imp {font-weight: bold; color: red;}
.xml li, .xml .li1 {color: #DDD;}
.xml .ln {width:1px;text-align:right;margin:0;padding:0 2px;vertical-align:top;}
.xml .es0 {color: #000099; font-weight: bold;}
.xml .br0 {color: #66cc66;}
.xml .sy0 {color: #66cc66;}
.xml .st0 {color: #ff0000;}
.xml .sc-1 {color: #808080; font-style: italic;}
.xml .sc0 {color: #00bbdd;}
.xml .sc1 {color: #ddbb00;}
.xml .sc2 {color: #339933;}
.xml .sc3 {color: #009900;}
.xml .re0 {color: #000066;}
.xml .re1 {color: #000000; font-weight: bold;}
.xml .re2 {color: #000000; font-weight: bold;}
.xml span.xtra { display:block; }
</style><div class="code"><table class="xml"><tbody><tr class="li1"><td class="ln"><pre class="de1">1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
</pre></td><td class="de1"><pre class="de1"><span class="sc3"><span class="re1"><?xml</span> <span class="re0">version</span>=<span class="st0">"1.0"</span> <span class="re0">encoding</span>=<span class="st0">"utf-8"</span> <span class="re2">?></span></span>
<span class="sc0"><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"></span>
<span class="sc3"><span class="re1"><html</span> <span class="re0">xmlns</span>=<span class="st0">"http://www.w3.org/1999/xhtml"</span> <span class="re0">xml:lang</span>=<span class="st0">"en"</span> <span class="re0">lang</span>=<span class="st0">"en"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><head<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><meta</span> <span class="re0">http-equiv</span>=<span class="st0">"Content-Type"</span> <span class="re0">content</span>=<span class="st0">"text/html; charset=utf-8"</span> <span class="re2">/></span></span>
<span class="sc3"><span class="re1"><meta</span> <span class="re0">name</span>=<span class="st0">"generator"</span> <span class="re0">content</span>=<span class="st0">"Docutils 0.10: http://docutils.sourceforge.net/"</span> <span class="re2">/></span></span>
<span class="sc3"><span class="re1"><title<span class="re2">></span></span><span class="re1"></title<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><style</span> <span class="re0">type</span>=<span class="st0">"text/css"</span><span class="re2">></span></span>
 
/*
:Author: David Goodger (goodger@python.org)
:Id: $Id: html4css1.css 7514 2012-09-14 14:27:12Z milde $
:Copyright: This stylesheet has been placed in the public domain.
 
Default cascading style sheet for the HTML output of Docutils.
 
See http://docutils.sf.net/docs/howto/html-stylesheets.html for how to
customize this style sheet.
*/
 
/* used to remove borders from tables and images */
.borderless, table.borderless td, table.borderless th {
  border: 0 }
 
table.borderless td, table.borderless th {
  /* Override padding for "table.docutils td" with "! important".
     The right padding separates the table cells. */
  padding: 0 0.5em 0 0 ! important }
 
.first {
  /* Override more specific margin styles with "! important". */
  margin-top: 0 ! important }
 
.last, .with-subtitle {
  margin-bottom: 0 ! important }
 
.hidden {
  display: none }
 
a.toc-backref {
  text-decoration: none ;
  color: black }
 
blockquote.epigraph {
  margin: 2em 5em ; }
 
dl.docutils dd {
  margin-bottom: 0.5em }
 
object[type="image/svg+xml"], object[type="application/x-shockwave-flash"] {
  overflow: hidden;
}
 
/* Uncomment (and remove this text!) to get bold-faced definition list terms
dl.docutils dt {
  font-weight: bold }
*/
 
div.abstract {
  margin: 2em 5em }
 
div.abstract p.topic-title {
  font-weight: bold ;
  text-align: center }
 
div.admonition, div.attention, div.caution, div.danger, div.error,
div.hint, div.important, div.note, div.tip, div.warning {
  margin: 2em ;
  border: medium outset ;
  padding: 1em }
 
div.admonition p.admonition-title, div.hint p.admonition-title,
div.important p.admonition-title, div.note p.admonition-title,
div.tip p.admonition-title {
  font-weight: bold ;
  font-family: sans-serif }
 
div.attention p.admonition-title, div.caution p.admonition-title,
div.danger p.admonition-title, div.error p.admonition-title,
div.warning p.admonition-title, .code .error {
  color: red ;
  font-weight: bold ;
  font-family: sans-serif }
 
/* Uncomment (and remove this text!) to get reduced vertical space in
   compound paragraphs.
div.compound .compound-first, div.compound .compound-middle {
  margin-bottom: 0.5em }
 
div.compound .compound-last, div.compound .compound-middle {
  margin-top: 0.5em }
*/
 
div.dedication {
  margin: 2em 5em ;
  text-align: center ;
  font-style: italic }
 
div.dedication p.topic-title {
  font-weight: bold ;
  font-style: normal }
 
div.figure {
  margin-left: 2em ;
  margin-right: 2em }
 
div.footer, div.header {
  clear: both;
  font-size: smaller }
 
div.line-block {
  display: block ;
  margin-top: 1em ;
  margin-bottom: 1em }
 
div.line-block div.line-block {
  margin-top: 0 ;
  margin-bottom: 0 ;
  margin-left: 1.5em }
 
div.sidebar {
  margin: 0 0 0.5em 1em ;
  border: medium outset ;
  padding: 1em ;
  background-color: #ffffee ;
  width: 40% ;
  float: right ;
  clear: right }
 
div.sidebar p.rubric {
  font-family: sans-serif ;
  font-size: medium }
 
div.system-messages {
  margin: 5em }
 
div.system-messages h1 {
  color: red }
 
div.system-message {
  border: medium outset ;
  padding: 1em }
 
div.system-message p.system-message-title {
  color: red ;
  font-weight: bold }
 
div.topic {
  margin: 2em }
 
h1.section-subtitle, h2.section-subtitle, h3.section-subtitle,
h4.section-subtitle, h5.section-subtitle, h6.section-subtitle {
  margin-top: 0.4em }
 
h1.title {
  text-align: center }
 
h2.subtitle {
  text-align: center }
 
hr.docutils {
  width: 75% }
 
img.align-left, .figure.align-left, object.align-left {
  clear: left ;
  float: left ;
  margin-right: 1em }
 
img.align-right, .figure.align-right, object.align-right {
  clear: right ;
  float: right ;
  margin-left: 1em }
 
img.align-center, .figure.align-center, object.align-center {
  display: block;
  margin-left: auto;
  margin-right: auto;
}
 
.align-left {
  text-align: left }
 
.align-center {
  clear: both ;
  text-align: center }
 
.align-right {
  text-align: right }
 
/* reset inner alignment in figures */
div.align-right {
  text-align: inherit }
 
/* div.align-center * { */
/*   text-align: left } */
 
ol.simple, ul.simple {
  margin-bottom: 1em }
 
ol.arabic {
  list-style: decimal }
 
ol.loweralpha {
  list-style: lower-alpha }
 
ol.upperalpha {
  list-style: upper-alpha }
 
ol.lowerroman {
  list-style: lower-roman }
 
ol.upperroman {
  list-style: upper-roman }
 
p.attribution {
  text-align: right ;
  margin-left: 50% }
 
p.caption {
  font-style: italic }
 
p.credits {
  font-style: italic ;
  font-size: smaller }
 
p.label {
  white-space: nowrap }
 
p.rubric {
  font-weight: bold ;
  font-size: larger ;
  color: maroon ;
  text-align: center }
 
p.sidebar-title {
  font-family: sans-serif ;
  font-weight: bold ;
  font-size: larger }
 
p.sidebar-subtitle {
  font-family: sans-serif ;
  font-weight: bold }
 
p.topic-title {
  font-weight: bold }
 
pre.address {
  margin-bottom: 0 ;
  margin-top: 0 ;
  font: inherit }
 
pre.literal-block, pre.doctest-block, pre.math, pre.code {
  margin-left: 2em ;
  margin-right: 2em }
 
pre.code .ln { color: grey; } /* line numbers */
pre.code, code { background-color: #eeeeee }
pre.code .comment, code .comment { color: #5C6576 }
pre.code .keyword, code .keyword { color: #3B0D06; font-weight: bold }
pre.code .literal.string, code .literal.string { color: #0C5404 }
pre.code .name.builtin, code .name.builtin { color: #352B84 }
pre.code .deleted, code .deleted { background-color: #DEB0A1}
pre.code .inserted, code .inserted { background-color: #A3D289}
 
span.classifier {
  font-family: sans-serif ;
  font-style: oblique }
 
span.classifier-delimiter {
  font-family: sans-serif ;
  font-weight: bold }
 
span.interpreted {
  font-family: sans-serif }
 
span.option {
  white-space: nowrap }
 
span.pre {
  white-space: pre }
 
span.problematic {
  color: red }
 
span.section-subtitle {
  /* font-size relative to parent (h1..h6 element) */
  font-size: 80% }
 
table.citation {
  border-left: solid 1px gray;
  margin-left: 1px }
 
table.docinfo {
  margin: 2em 4em }
 
table.docutils {
  margin-top: 0.5em ;
  margin-bottom: 0.5em }
 
table.footnote {
  border-left: solid 1px black;
  margin-left: 1px }
 
table.docutils td, table.docutils th,
table.docinfo td, table.docinfo th {
  padding-left: 0.5em ;
  padding-right: 0.5em ;
  vertical-align: top }
 
table.docutils th.field-name, table.docinfo th.docinfo-name {
  font-weight: bold ;
  text-align: left ;
  white-space: nowrap ;
  padding-left: 0 }
 
h1 tt.docutils, h2 tt.docutils, h3 tt.docutils,
h4 tt.docutils, h5 tt.docutils, h6 tt.docutils {
  font-size: 100% }
 
ul.auto-toc {
  list-style-type: none }
 
<span class="sc3"><span class="re1"></style<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></head<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><body<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><div</span> <span class="re0">class</span>=<span class="st0">"document"</span><span class="re2">></span></span>
 
 
<span class="sc3"><span class="re1"><div</span> <span class="re0">class</span>=<span class="st0">"section"</span> <span class="re0">id</span>=<span class="st0">"synopsis"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><h1<span class="re2">></span></span></span>Synopsis<span class="sc3"><span class="re1"></h1<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><p<span class="re2">></span></span></span>Find the position of the first occurrence of a substring in a string<span class="sc3"><span class="re1"></p<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></div<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><div</span> <span class="re0">class</span>=<span class="st0">"section"</span> <span class="re0">id</span>=<span class="st0">"description"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><h1<span class="re2">></span></span></span>Description<span class="sc3"><span class="re1"></h1<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><div</span> <span class="re0">class</span>=<span class="st0">"system-message"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><p</span> <span class="re0">class</span>=<span class="st0">"system-message-title"</span><span class="re2">></span></span>System Message: ERROR/3 (<span class="sc3"><span class="re1"><tt</span> <span class="re0">class</span>=<span class="st0">"docutils"</span><span class="re2">></span></span>function.strpos.rst<span class="sc3"><span class="re1"></tt<span class="re2">></span></span></span>, line 8)<span class="sc3"><span class="re1"></p<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><p<span class="re2">></span></span></span>Unknown directive type <span class="sc1">&quot;</span>signature<span class="sc1">&quot;</span>.<span class="sc3"><span class="re1"></p<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><pre</span> <span class="re0">class</span>=<span class="st0">"literal-block"</span><span class="re2">></span></span>
.. signature::
    int function strpos(
        string $haystack,
        mixed $needle,
        int $offset = 0
    )
 
<span class="sc3"><span class="re1"></pre<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></div<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><p<span class="re2">></span></span></span>Find the numeric position of the first occurrence of <span class="sc3"><span class="re1"><tt</span> <span class="re0">class</span>=<span class="st0">"docutils literal"</span><span class="re2">></span></span>$needle<span class="sc3"><span class="re1"></tt<span class="re2">></span></span></span> in the
<span class="sc3"><span class="re1"><tt</span> <span class="re0">class</span>=<span class="st0">"docutils literal"</span><span class="re2">></span></span>$haystack<span class="sc3"><span class="re1"></tt<span class="re2">></span></span></span> string.<span class="sc3"><span class="re1"></p<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></div<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><div</span> <span class="re0">class</span>=<span class="st0">"section"</span> <span class="re0">id</span>=<span class="st0">"parameters"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><h1<span class="re2">></span></span></span>Parameters<span class="sc3"><span class="re1"></h1<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><dl</span> <span class="re0">class</span>=<span class="st0">"docutils"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><dt<span class="re2">></span></span><span class="re1"><tt</span> <span class="re0">class</span>=<span class="st0">"docutils literal"</span><span class="re2">></span></span>$haystack<span class="sc3"><span class="re1"></tt<span class="re2">></span></span><span class="re1"></dt<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><dd<span class="re2">></span></span></span>The string to search in.<span class="sc3"><span class="re1"></dd<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><dt<span class="re2">></span></span><span class="re1"><tt</span> <span class="re0">class</span>=<span class="st0">"docutils literal"</span><span class="re2">></span></span>$needle<span class="sc3"><span class="re1"></tt<span class="re2">></span></span><span class="re1"></dt<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><dd<span class="re2">></span></span></span>If <span class="sc3"><span class="re1"><tt</span> <span class="re0">class</span>=<span class="st0">"docutils literal"</span><span class="re2">></span></span>$needle<span class="sc3"><span class="re1"></tt<span class="re2">></span></span></span> is not a string, it is converted to an integer and applied as the ordinal value of a character.<span class="sc3"><span class="re1"></dd<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><dt<span class="re2">></span></span><span class="re1"><tt</span> <span class="re0">class</span>=<span class="st0">"docutils literal"</span><span class="re2">></span></span>$offset<span class="sc3"><span class="re1"></tt<span class="re2">></span></span><span class="re1"></dt<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><dd<span class="re2">></span></span></span>If specified, search will start this number of characters counted from the beginning of the string. Unlike <span class="sc3"><span class="re1"><a</span> <span class="re0">class</span>=<span class="st0">"reference external"</span> <span class="re0">href</span>=<span class="st0">"function.strrpos"</span><span class="re2">></span></span>FUNCTION:strrpos<span class="sc3"><span class="re1"></a<span class="re2">></span></span></span> and <span class="sc3"><span class="re1"><a</span> <span class="re0">class</span>=<span class="st0">"reference external"</span> <span class="re0">href</span>=<span class="st0">"function.strripos"</span><span class="re2">></span></span>FUNCTION:strripos<span class="sc3"><span class="re1"></a<span class="re2">></span></span></span>, the offset cannot be negative.<span class="sc3"><span class="re1"></dd<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></dl<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></div<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><div</span> <span class="re0">class</span>=<span class="st0">"section"</span> <span class="re0">id</span>=<span class="st0">"return-values"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><h1<span class="re2">></span></span></span>Return values<span class="sc3"><span class="re1"></h1<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><p<span class="re2">></span></span></span>Returns the position of where the needle exists relative to the beginning of the <span class="sc3"><span class="re1"><tt</span> <span class="re0">class</span>=<span class="st0">"docutils literal"</span><span class="re2">></span></span>$haystack<span class="sc3"><span class="re1"></tt<span class="re2">></span></span></span> string (independent of offset). Also note that string positions start at 0, and not 1.
Returns <span class="sc3"><span class="re1"><a</span> <span class="re0">class</span>=<span class="st0">"reference external"</span> <span class="re0">href</span>=<span class="st0">"false"</span><span class="re2">></span></span>FALSE<span class="sc3"><span class="re1"></a<span class="re2">></span></span></span> if the needle was not found.<span class="sc3"><span class="re1"></p<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><div</span> <span class="re0">class</span>=<span class="st0">"warning"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><p</span> <span class="re0">class</span>=<span class="st0">"first admonition-title"</span><span class="re2">></span></span>Warning<span class="sc3"><span class="re1"></p<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><p</span> <span class="re0">class</span>=<span class="st0">"last"</span><span class="re2">></span></span>This function may return Boolean <span class="sc3"><span class="re1"><a</span> <span class="re0">class</span>=<span class="st0">"reference external"</span> <span class="re0">href</span>=<span class="st0">"false"</span><span class="re2">></span></span>FALSE<span class="sc3"><span class="re1"></a<span class="re2">></span></span></span>, but may also return a non-Boolean value which evaluates to <span class="sc3"><span class="re1"><a</span> <span class="re0">class</span>=<span class="st0">"reference external"</span> <span class="re0">href</span>=<span class="st0">"false"</span><span class="re2">></span></span>FALSE<span class="sc3"><span class="re1"></a<span class="re2">></span></span></span>. Please read the section on <span class="sc3"><span class="re1"><a</span> <span class="re0">class</span>=<span class="st0">"reference external"</span> <span class="re0">href</span>=<span class="st0">"language.types.boolean"</span><span class="re2">></span></span>Booleans<span class="sc3"><span class="re1"></a<span class="re2">></span></span></span> for more information. Use <span class="sc3"><span class="re1"><a</span> <span class="re0">class</span>=<span class="st0">"reference external"</span> <span class="re0">href</span>=<span class="st0">"language.operators.comparison"</span><span class="re2">></span></span>the === operator<span class="sc3"><span class="re1"></a<span class="re2">></span></span></span> for testing the return value of this function.<span class="sc3"><span class="re1"></p<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></div<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></div<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><div</span> <span class="re0">class</span>=<span class="st0">"section"</span> <span class="re0">id</span>=<span class="st0">"examples"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><h1<span class="re2">></span></span></span>EXAMPLES<span class="sc3"><span class="re1"></h1<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><div</span> <span class="re0">class</span>=<span class="st0">"section"</span> <span class="re0">id</span>=<span class="st0">"using"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><h2<span class="re2">></span></span></span>Using _===_<span class="sc3"><span class="re1"></h2<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><pre</span> <span class="re0">class</span>=<span class="st0">"code php literal-block"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"comment preproc"</span><span class="re2">></span></span><span class="sc1">&lt;</span>?php<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"name variable"</span><span class="re2">></span></span>$mystring<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"operator"</span><span class="re2">></span></span>=<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string single"</span><span class="re2">></span></span>'abc'<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>;<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"name variable"</span><span class="re2">></span></span>$findme<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>   <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"operator"</span><span class="re2">></span></span>=<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string single"</span><span class="re2">></span></span>'a'<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>;<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"name variable"</span><span class="re2">></span></span>$pos<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"operator"</span><span class="re2">></span></span>=<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"name builtin"</span><span class="re2">></span></span>strpos<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>(<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"name variable"</span><span class="re2">></span></span>$mystring<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>,<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"name variable"</span><span class="re2">></span></span>$findme<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>);<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
 
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"comment single"</span><span class="re2">></span></span>// Note our use of ===.  Simply == would not work as expected
// because the position of 'a' was the 0th (first) character.
<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"keyword"</span><span class="re2">></span></span>if<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>(<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"name variable"</span><span class="re2">></span></span>$pos<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"operator"</span><span class="re2">></span></span>===<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"keyword"</span><span class="re2">></span></span>false<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>)<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>{<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
    <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"keyword"</span><span class="re2">></span></span>echo<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string double"</span><span class="re2">></span></span><span class="sc1">&quot;</span>The string '<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string interpol"</span><span class="re2">></span></span>$findme<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string double"</span><span class="re2">></span></span>' was not found in the string '<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string interpol"</span><span class="re2">></span></span>$mystring<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string double"</span><span class="re2">></span></span>'<span class="sc1">&quot;</span><span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>;<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>}<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"keyword"</span><span class="re2">></span></span>else<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>{<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
    <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"keyword"</span><span class="re2">></span></span>echo<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string double"</span><span class="re2">></span></span><span class="sc1">&quot;</span>The string '<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string interpol"</span><span class="re2">></span></span>$findme<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string double"</span><span class="re2">></span></span>' was found in the string '<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string interpol"</span><span class="re2">></span></span>$mystring<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string double"</span><span class="re2">></span></span>'<span class="sc1">&quot;</span><span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>;<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
    <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"keyword"</span><span class="re2">></span></span>echo<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string double"</span><span class="re2">></span></span><span class="sc1">&quot;</span> and exists at position <span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string interpol"</span><span class="re2">></span></span>$pos<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string double"</span><span class="re2">></span></span><span class="sc1">&quot;</span><span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>;<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>}<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"comment preproc"</span><span class="re2">></span></span>?<span class="sc1">&gt;</span><span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></pre<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></div<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><div</span> <span class="re0">class</span>=<span class="st0">"section"</span> <span class="re0">id</span>=<span class="st0">"id3"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><h2<span class="re2">></span></span></span>Using !==<span class="sc3"><span class="re1"></h2<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><pre</span> <span class="re0">class</span>=<span class="st0">"code php literal-block"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"comment preproc"</span><span class="re2">></span></span><span class="sc1">&lt;</span>?php<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"name variable"</span><span class="re2">></span></span>$mystring<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"operator"</span><span class="re2">></span></span>=<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string single"</span><span class="re2">></span></span>'abc'<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>;<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"name variable"</span><span class="re2">></span></span>$findme<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>   <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"operator"</span><span class="re2">></span></span>=<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string single"</span><span class="re2">></span></span>'a'<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>;<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"name variable"</span><span class="re2">></span></span>$pos<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"operator"</span><span class="re2">></span></span>=<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"name builtin"</span><span class="re2">></span></span>strpos<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>(<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"name variable"</span><span class="re2">></span></span>$mystring<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>,<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"name variable"</span><span class="re2">></span></span>$findme<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>);<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
 
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"comment single"</span><span class="re2">></span></span>// The !== operator can also be used.  Using != would not work as expected
// because the position of 'a' is 0. The statement (0 != false) evaluates
// to false.
<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"keyword"</span><span class="re2">></span></span>if<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>(<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"name variable"</span><span class="re2">></span></span>$pos<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"operator"</span><span class="re2">></span></span>!==<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"keyword"</span><span class="re2">></span></span>false<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>)<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>{<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
    <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"keyword"</span><span class="re2">></span></span>echo<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string double"</span><span class="re2">></span></span><span class="sc1">&quot;</span>The string '<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string interpol"</span><span class="re2">></span></span>$findme<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string double"</span><span class="re2">></span></span>' was found in the string '<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string interpol"</span><span class="re2">></span></span>$mystring<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string double"</span><span class="re2">></span></span>'<span class="sc1">&quot;</span><span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>;<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
    <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"keyword"</span><span class="re2">></span></span>echo<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string double"</span><span class="re2">></span></span><span class="sc1">&quot;</span> and exists at position <span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string interpol"</span><span class="re2">></span></span>$pos<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string double"</span><span class="re2">></span></span><span class="sc1">&quot;</span><span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>;<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>}<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"keyword"</span><span class="re2">></span></span>else<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>{<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
    <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"keyword"</span><span class="re2">></span></span>echo<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string double"</span><span class="re2">></span></span><span class="sc1">&quot;</span>The string '<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string interpol"</span><span class="re2">></span></span>$findme<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string double"</span><span class="re2">></span></span>' was not found in the string '<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string interpol"</span><span class="re2">></span></span>$mystring<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string double"</span><span class="re2">></span></span>'<span class="sc1">&quot;</span><span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>;<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>}<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"comment preproc"</span><span class="re2">></span></span>?<span class="sc1">&gt;</span><span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></pre<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></div<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><div</span> <span class="re0">class</span>=<span class="st0">"section"</span> <span class="re0">id</span>=<span class="st0">"using-an-offset"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><h2<span class="re2">></span></span></span>Using an offset<span class="sc3"><span class="re1"></h2<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><pre</span> <span class="re0">class</span>=<span class="st0">"code php literal-block"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"comment preproc"</span><span class="re2">></span></span><span class="sc1">&lt;</span>?php<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"comment single"</span><span class="re2">></span></span>// We can search for the character, ignoring anything before the offset
<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"name variable"</span><span class="re2">></span></span>$newstring<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"operator"</span><span class="re2">></span></span>=<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string single"</span><span class="re2">></span></span>'abcdef abcdef'<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>;<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"name variable"</span><span class="re2">></span></span>$pos<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"operator"</span><span class="re2">></span></span>=<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"name builtin"</span><span class="re2">></span></span>strpos<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>(<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"name variable"</span><span class="re2">></span></span>$newstring<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>,<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal string single"</span><span class="re2">></span></span>'a'<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>,<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"literal number integer"</span><span class="re2">></span></span>1<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"punctuation"</span><span class="re2">></span></span>);<span class="sc3"><span class="re1"></span<span class="re2">></span></span></span> <span class="sc3"><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"comment single"</span><span class="re2">></span></span>// $pos = 7, not 0
<span class="sc3"><span class="re1"></span<span class="re2">></span></span><span class="re1"><span</span> <span class="re0">class</span>=<span class="st0">"comment preproc"</span><span class="re2">></span></span>?<span class="sc1">&gt;</span><span class="sc3"><span class="re1"></span<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></pre<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></div<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></div<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><div</span> <span class="re0">class</span>=<span class="st0">"section"</span> <span class="re0">id</span>=<span class="st0">"notes"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><h1<span class="re2">></span></span></span>Notes<span class="sc3"><span class="re1"></h1<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><div</span> <span class="re0">class</span>=<span class="st0">"note"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><p</span> <span class="re0">class</span>=<span class="st0">"first admonition-title"</span><span class="re2">></span></span>Note<span class="sc3"><span class="re1"></p<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><p</span> <span class="re0">class</span>=<span class="st0">"last"</span><span class="re2">></span></span>This function is binary-safe.<span class="sc3"><span class="re1"></p<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></div<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></div<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><div</span> <span class="re0">class</span>=<span class="st0">"section"</span> <span class="re0">id</span>=<span class="st0">"see-also"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><h1<span class="re2">></span></span></span>See also<span class="sc3"><span class="re1"></h1<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><ul</span> <span class="re0">class</span>=<span class="st0">"simple"</span><span class="re2">></span></span>
<span class="sc3"><span class="re1"><li<span class="re2">></span></span><span class="re1"><a</span> <span class="re0">class</span>=<span class="st0">"reference external"</span> <span class="re0">href</span>=<span class="st0">"function.stripos"</span><span class="re2">></span></span>FUNCTION:stripos<span class="sc3"><span class="re1"></a<span class="re2">></span></span><span class="re1"></li<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><li<span class="re2">></span></span><span class="re1"><a</span> <span class="re0">class</span>=<span class="st0">"reference external"</span> <span class="re0">href</span>=<span class="st0">"function.strrpos"</span><span class="re2">></span></span>FUNCTION:strrpos<span class="sc3"><span class="re1"></a<span class="re2">></span></span><span class="re1"></li<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><li<span class="re2">></span></span><span class="re1"><a</span> <span class="re0">class</span>=<span class="st0">"reference external"</span> <span class="re0">href</span>=<span class="st0">"function.strripos"</span><span class="re2">></span></span>FUNCTION:strripos<span class="sc3"><span class="re1"></a<span class="re2">></span></span><span class="re1"></li<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><li<span class="re2">></span></span><span class="re1"><a</span> <span class="re0">class</span>=<span class="st0">"reference external"</span> <span class="re0">href</span>=<span class="st0">"function.strstr"</span><span class="re2">></span></span>FUNCTION:strstr<span class="sc3"><span class="re1"></a<span class="re2">></span></span><span class="re1"></li<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><li<span class="re2">></span></span><span class="re1"><a</span> <span class="re0">class</span>=<span class="st0">"reference external"</span> <span class="re0">href</span>=<span class="st0">"function.strpbrk"</span><span class="re2">></span></span>FUNCTION:strpbrk<span class="sc3"><span class="re1"></a<span class="re2">></span></span><span class="re1"></li<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><li<span class="re2">></span></span><span class="re1"><a</span> <span class="re0">class</span>=<span class="st0">"reference external"</span> <span class="re0">href</span>=<span class="st0">"function.substr"</span><span class="re2">></span></span>FUNCTION:substr<span class="sc3"><span class="re1"></a<span class="re2">></span></span><span class="re1"></li<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"><li<span class="re2">></span></span><span class="re1"><a</span> <span class="re0">class</span>=<span class="st0">"reference external"</span> <span class="re0">href</span>=<span class="st0">"function.preg_match"</span><span class="re2">></span></span>FUNCTION:preg_match<span class="sc3"><span class="re1"></a<span class="re2">></span></span><span class="re1"></li<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></ul<span class="re2">></span></span></span>
<span class="sc-1"><!-- this here would be autogenerated from the file list, or in an include similar to global.ent: --></span>
<span class="sc3"><span class="re1"></div<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></div<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></body<span class="re2">></span></span></span>
<span class="sc3"><span class="re1"></html<span class="re2">></span></span></span>
 </pre></td></tr></tbody></table></div>
</div>
<div class="phork-meta">
<a href="https://p.cweiske.de/51/rev-raw/a35f5f61bc0f791b8fe6053e9421f2716510fa64/function.strpos.rst.html" style="float: right">view raw source</a>
<a href="https://p.cweiske.de/51#function.strpos.rst.html">function.strpos.rst.html</a>
</div>
</div>
</div>