3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $str = '<a href="hello">world</a><div>wow <div>such depth</div> with another <a href="foo">link</a></div> <h1>and other html stuff</h1>'; $id = 1; print $str; print "<hr>"; $new_str = preg_replace_callback("/(<a|<div)/", function($match) use (&$id) { switch ($match[1]) { case '<div': $result = '<div id="b_'.$id.'"'; break; case '<a': $result = '<!-- UNIT'.$id.' --><a id="a_'.$id.'"'; break; default: $result = ""; break; } $id++; return $result; }, $str); print $new_str;
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
<a href="hello">world</a><div>wow <div>such depth</div> with another <a href="foo">link</a></div> <h1>and other html stuff</h1><hr><!-- UNIT1 --><a id="a_1" href="hello">world</a><div id="b_2">wow <div id="b_3">such depth</div> with another <!-- UNIT4 --><a id="a_4" href="foo">link</a></div> <h1>and other html stuff</h1>
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/I7Skk on line 10
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/I7Skk on line 10
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/I7Skk on line 10
Process exited with code 255.