3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $i = 1; $a = [1,2,$i,4,5]; $iter = new ArrayIterator($a); foreach($iter as &$v) { $v = 1; } var_dump($a); var_dump($iter);
Output for 5.4.0 - 5.6.28, 7.0.0 - 7.1.0
array(5) { [0]=> int(1) [1]=> int(2) [2]=> int(1) [3]=> int(4) [4]=> int(5) } object(ArrayIterator)#1 (1) { ["storage":"ArrayIterator":private]=> array(5) { [0]=> int(1) [1]=> int(1) [2]=> int(1) [3]=> int(1) [4]=> &int(1) } }
Output for hhvm-3.12.0
Fatal error: Uncaught Error: An iterator cannot be used with foreach by reference in /in/r6D2S:9 Stack trace: #0 {main}
Process exited with code 255.
Output for hhvm-3.10.0
Fatal error: An iterator cannot be used with foreach by reference in /in/r6D2S on line 9
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/r6D2S on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/r6D2S on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/r6D2S on line 4
Process exited with code 255.