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<?php $a = ['a' => ['f' => 1], 'b' => ['f' => 2], 'c' => ['f' => 3]]; foreach ($a as &$i) { $i['s'] = $i['f']; } var_dump($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) { ["f"]=> int(1) ["s"]=> int(1) } ["b"]=> array(2) { ["f"]=> int(2) ["s"]=> int(2) } ["c"]=> &array(2) { ["f"]=> int(3) ["s"]=> int(3) } }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/D7uTY 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/D7uTY on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/D7uTY on line 4
Process exited with code 255.