3v4l.org

run code in 300+ PHP versions simultaneously
<?php $text = null; $c = 1; $r = preg_replace_callback('/(<p( [^>]+)?>)/i', function ($res) { global $c; return '<p'.$res[2].' id="'.intval($c++).'">'; }, $text); $r = preg_replace('/(<p.*?)id="'.($c-1).'"(>)/i', '\1id="Last"\2', $r); $text = $r; echo $text;
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: preg_replace_callback(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /in/pP8OA on line 4

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page


preferences:
40.48 ms | 401 KiB | 8 Q