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run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = [ 'a' => ['first' => 1], 'b' => ['first' => 2], 'c' => ['first' => 3], ]; foreach ($a as &$i) { $i['second'] = $i['first']; } foreach ($a as &$i) {} var_dump($a);
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(3) { ["a"]=> array(2) { ["first"]=> int(1) ["second"]=> int(1) } ["b"]=> array(2) { ["first"]=> int(2) ["second"]=> int(2) } ["c"]=> &array(2) { ["first"]=> int(3) ["second"]=> int(3) } }
Output for 5.2.3 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/Mvbs0 on line 4
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.2
<br /> <b>Parse error</b>: syntax error, unexpected '[' in <b>/in/Mvbs0</b> on line <b>4</b><br />
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
<br /> <b>Parse error</b>: parse error, unexpected '[' in <b>/in/Mvbs0</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 in <b>/in/Mvbs0</b> on line <b>4</b><br />
Process exited with code 255.