3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array(2, 4, 8); doFoo($arr); echo '<pre>'; print_r($arr); function doFoo($array) { foreach ($array as &$foo) { $foo += 1; echo '<pre>' . &$foo . '</pre>'; } }
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.23
Parse error: syntax error, unexpected '&' in /in/7QpKW on line 11
Process exited with code 255.

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