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<?php $array = array( 0 => array( 0 => 'My Property', 1 => array( 0 => 'Tiles Market', 1 => 'My Floor' ) ) ); var_dump($array); $result = call_user_func_array('array_merge', $array); var_dump($result); $result = call_user_func_array('array_merge', $result);
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { [0]=> array(2) { [0]=> string(11) "My Property" [1]=> array(2) { [0]=> string(12) "Tiles Market" [1]=> string(8) "My Floor" } } } array(2) { [0]=> string(11) "My Property" [1]=> array(2) { [0]=> string(12) "Tiles Market" [1]=> string(8) "My Floor" } } Fatal error: Uncaught TypeError: array_merge(): Argument #1 must be of type array, string given in /in/h3bWH:14 Stack trace: #0 /in/h3bWH(14): array_merge('My Property', Array) #1 {main} thrown in /in/h3bWH on line 14
Process exited with code 255.

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