3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [ 'a', 'b', 'c' ]; foreach(&z($a) as &$x) { $x .= 'q'; } print_r($a); function &z($a) { return $a; }
Output for 5.4.0 - 5.4.30
Parse error: syntax error, unexpected '&' in /in/vbEDp on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected '[' in /in/vbEDp on line 3
Process exited with code 255.
preferences:
182.48 ms | 1395 KiB | 67 Q