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run code in 200+ php & hhvm versions
Bugs & Features
<?php $oldArray = [["2"],["2","3","4"],["8","9"],["7","4"]]; $newArray = array_unique(call_user_func_array('array_merge', $oldArray)); sort($newArray); var_dump($newArray);
Output for 5.4.0 - 7.2.0
array(6) { [0]=> string(1) "2" [1]=> string(1) "3" [2]=> string(1) "4" [3]=> string(1) "7" [4]=> string(1) "8" [5]=> string(1) "9" }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/WlsbR 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/WlsbR on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/WlsbR on line 3
Process exited with code 255.