3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $buf; $buffer = preg_replace('#выав#si', 'dfs$13423', $buf, 1, $counter);
Output for 5.1.3 - 7.1.0
Notice: Undefined variable: buf in /in/nJ5Hs on line 3
Output for 5.1.0 - 5.1.2
Notice: Undefined variable: buf in /in/nJ5Hs on line 3 Notice: Undefined variable: counter in /in/nJ5Hs on line 3
Output for 5.0.4 - 5.0.5
Notice: Undefined variable: buf in /in/nJ5Hs on line 2 Notice: Undefined variable: buf in /in/nJ5Hs on line 3 Notice: Undefined variable: counter in /in/nJ5Hs on line 3 Warning: Wrong parameter count for preg_replace() in /in/nJ5Hs on line 3
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: buf in /in/nJ5Hs on line 2 Notice: Undefined variable: buf in /in/nJ5Hs on line 3 Notice: Undefined variable: counter in /in/nJ5Hs on line 3 Warning: Wrong parameter count for preg_replace() in /in/nJ5Hs on line 3