3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array( 'a' => array('value' => 2), 'b' => array('value' => 4), 'c' => array('value' => 6) ); print_r($arr); foreach ($arr as &$a) { $a['value'] /= 2; } foreach ($arr as $a) { print_r($a); } unset($a); foreach ($arr as $a) { print_r($a); }
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [a] => Array ( [value] => 2 ) [b] => Array ( [value] => 4 ) [c] => Array ( [value] => 6 ) ) Array ( [value] => 1 ) Array ( [value] => 2 ) Array ( [value] => 2 ) Array ( [value] => 1 ) Array ( [value] => 2 ) Array ( [value] => 2 )
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '&', expecting T_VARIABLE or '$' in /in/UVa6l on line 11
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected '&', expecting T_VARIABLE or '$' in /in/UVa6l on line 11
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/UVa6l on line 11
Process exited with code 255.

preferences:
323.36 ms | 401 KiB | 460 Q