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run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = ['a'=>1,'b'=>2,'c'=>3]; var_dump(array_reduce($a, function($result, $item){ $key = key($result) == 'a' ? 'a' : 'aa'; $result[$key] = $item; return $result; }));
Output for 5.4.0 - 7.1.0
Warning: key() expects parameter 1 to be array, null given in /in/rN3WP on line 5 array(1) { ["aa"]=> int(3) }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/rN3WP on line 3
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/rN3WP on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/rN3WP on line 3
Process exited with code 255.