hi
Warning: call_user_func() expects parameter 1 to be a valid callback, no array or string given in /in/G2i2D on line 15
Warning: call_user_func() expects parameter 1 to be a valid callback, no array or string given in /in/G2i2D on line 18
Warning: call_user_func() expects parameter 1 to be a valid callback, no array or string given in /in/G2i2D on line 21

see http://3v4l.org/G2i2D#vphp7@20150101