3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array('franz', 'de leon', 'blah'); foreach ($a as $key => &$val) { if ($val === 'de leon') { unset($a[$key]); } $val .= 'shit'; } var_dump($a);
Output for 5.2.2 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array(2) { [0]=> string(9) "franzshit" [2]=> &string(8) "blahshit" }
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.1
array(2) { [0]=> string(9) "franzshit" [2]=> string(4) "blah" }
Output for 4.4.2 - 4.4.9
<br /> <b>Parse error</b>: syntax error, unexpected '&', expecting T_VARIABLE or '$' in <b>/in/W1ETn</b> on line <b>4</b><br />
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
<br /> <b>Parse error</b>: parse error, unexpected '&', expecting T_VARIABLE or '$' in <b>/in/W1ETn</b> on line <b>4</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.4
<br /> <b>Parse error</b>: parse error, expecting `T_VARIABLE' or `'$'' in <b>/in/W1ETn</b> on line <b>4</b><br />
Process exited with code 255.

preferences:
234.98 ms | 401 KiB | 371 Q