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<?php $arr = array(); $arr[] = array(1 => array(2 => 2, 3 => array(4 => 4, 5 => 5)), 6 => 6); function showArray(&$arr) { echo('<pre>'.print_r($arr,true).'</pre>'); } array_walk_recursive($arr, 'showArrow');
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: array_walk_recursive(): Argument #2 ($callback) must be a valid callback, function "showArrow" not found or invalid function name in /in/qgRtk:9 Stack trace: #0 /in/qgRtk(9): array_walk_recursive(Array, 'showArrow') #1 {main} thrown in /in/qgRtk on line 9
Process exited with code 255.

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