3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function replace_unicode_escape_sequence($match) { echo $match return mb_convert_encoding(pack('H*', $match[1]), 'UTF-8', 'UCS-2BE'); } $str = "Bal\u00edky"; $str = preg_replace_callback('/\\\\u([0-9a-f]{4})/i', 'replace_unicode_escape_sequence', $str); echo $str;
Output for 5.4.0 - 5.4.30
Parse error: syntax error, unexpected 'return' (T_RETURN), expecting ',' or ';' in /in/rQ0on on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_RETURN, expecting ',' or ';' in /in/rQ0on on line 4
Process exited with code 255.