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<div class="section" id="client">
<h1>Client</h1>
<ul class="simple">
<li>send pingback for given URL to remote URL</li>
<li>use HTTP_Request2, since it allows to use curl if available and others if not</li>
</ul>
<pre class="literal-block">
$pc = new Pingback_Client();
$pc->send($myUrl, $targetUrl);
</pre>
<p>TODO: error handling. exceptions? simply true/false with $pc->getError()?</p>
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<div class="section" id="server">
<h1>Server</h1>
<ul class="simple">
<li>register custom handler</li>
<li>register custom validator</li>
<li>provide basic backlinking validator</li>
</ul>
<pre class="literal-block">
$ps = new Pingback_Server();
$ps->registerHandler(array($datastore, 'storePingback'));
$ps->registerValidator(array($pingbackValidator, 'checkBlogAge'));
$ps->registerValidator(array($pingbackValidator, 'checkFriendliness'));
$ps->run();
</pre>
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<div class="section" id="my-solution">
<h1>My Solution</h1>
<p><a class="reference external" href="https://github.com/pear2/Services_Linkback">https://github.com/pear2/Services_Linkback</a></p>
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<div class="section" id="existing-libraries">
<h1>Existing libraries</h1>
<ul class="simple">
<li><a class="reference external" href="http://pear.php.net/package/Services_Pingback">http://pear.php.net/package/Services_Pingback</a><ul>
<li>bad: uses outdated libraries (HTTP_Request v1, XML_RPC v1, Net_URL v1), not E_STRICT compliant</li>
</ul>
</li>
<li><a class="reference external" href="https://github.com/tedeh/pingback-php">https://github.com/tedeh/pingback-php</a><ul>
<li>bad: "Client" (Utility) has no state thus has to re-fetch the remote files again and again (isPingbackEnabled, getPingbackServerURL, isBacklinking)</li>
<li>you have to extend the server to properly use it</li>
<li>no examples</li>
</ul>
</li>
<li><a class="reference external" href="https://github.com/driedfruit/php-pingback">https://github.com/driedfruit/php-pingback</a><ul>
<li>bad: bunch of functions</li>
</ul>
</li>
<li>Zend Framework 1 has nothing<ul>
<li>there was a proposal, Zend_Service_Linkback, but it was not finished/included: <a class="reference external" href="http://framework.zend.com/wiki/pages/viewpage.action?pageId=13107298">http://framework.zend.com/wiki/pages/viewpage.action?pageId=13107298</a></li>
<li><a class="reference external" href="http://www.zendframeworkmagazin.de/zf/blog/pingback-mit-dem-zend-framework-1">http://www.zendframeworkmagazin.de/zf/blog/pingback-mit-dem-zend-framework-1</a></li>
</ul>
</li>
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