3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $arr = array(1, 2, 3, 4); foreach ($arr as &$value) { $value = $value * 2; } print_r(arr);
Output for 5.0.0 - 7.1.0
Notice: Use of undefined constant arr - assumed 'arr' in /in/6KqpF on line 6 arr
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '&', expecting T_VARIABLE or '$' in /in/6KqpF on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected '&', expecting T_VARIABLE or '$' in /in/6KqpF on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/6KqpF on line 3
Process exited with code 255.