3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function foo($m) { return md5($m[1]); } var_dump(preg_replace_callback('/A([^B]+)B/u','foo', "foo ApasswordB bar \xef\xb7\x90"));
Output for 4.3.0 - 5.3.23, 5.4.0 - 5.4.13, 5.4.41 - 5.4.45, 5.5.10 - 7.1.0
string(44) "foo 5f4dcc3b5aa765d61d8327deb882cf99 bar ﷐"
Output for 5.3.24 - 5.3.29, 5.4.14 - 5.4.40, 5.5.0 - 5.5.9
NULL