3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $string = 'xxx bla *xxx bla bla **xxx bla bla ***xxx bla bla ****xxx'; $search = 'xxx'; $char = '*'; $string = preg_replace_callback( '/\b(' . preg_quote($char) . '*)(' . $search . ')\b/', function($matches) { global $char; if(strlen($matches[1]) % 2 === 0) { return $matches[1] . $char . $matches[2]; } else { return $matches[0]; } }, $string ); print $string;
based on 8dW4j
Output for 5.3.0 - 7.2.0
*xxx bla **xxx bla bla ***xxx bla bla ****xxx bla bla *****xxx
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/jpRpC 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/jpRpC on line 10
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/jpRpC on line 10
Process exited with code 255.