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<?php $arr = array( Array('weight' => '317.51474856007','reps' => '10'), Array('weight' => 50,'reps' => 10), Array('reps' => 10), Array('reps' => 10) ); //$count = array(); array_walk_recursive($arr, function($v, $k)use(&$count){if(array_key_exists($k, $count))$count[$k]++;else $count[$k]=1;}); print_r($count);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, null given in /in/bllb1:10 Stack trace: #0 [internal function]: {closure}('317.51474856007', 'weight') #1 /in/bllb1(10): array_walk_recursive(Array, Object(Closure)) #2 {main} thrown in /in/bllb1 on line 10
Process exited with code 255.

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