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run code in 150+ php & hhvm versions
Bugs & Features
<?php $r = range(1,10); array_walk(&$r, function(&$value, $key) { $double = $value*2; if ($double >= 12) { $value = $double; } else { unset($r[$key]); } }); var_dump($r);
Output for 5.4.0 - 5.4.28
Fatal error: Call-time pass-by-reference has been removed in /in/5JOdK on line 5
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Deprecated: Call-time pass-by-reference has been deprecated in /in/5JOdK on line 5 Notice: Undefined variable: r in /in/5JOdK on line 10 Notice: Undefined variable: r in /in/5JOdK on line 10 Notice: Undefined variable: r in /in/5JOdK on line 10 Notice: Undefined variable: r in /in/5JOdK on line 10 Notice: Undefined variable: r in /in/5JOdK on line 10 array(10) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(4) [4]=> int(5) [5]=> int(12) [6]=> int(14) [7]=> int(16) [8]=> int(18) [9]=> int(20) }