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<?php $arr = array( Array('weight' => '317.51474856007','reps' => '10'), Array('weight' => 50,'reps' => 10), Array('reps' => 10), Array('reps' => 10) ); array_walk_recursive($arr, function($v, $k)use(&$count){if(array_key_exists($k, $count))$count[$k]++;else $count[$k]=1;}, $count=array()); print_r($count);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [weight] => 2 [reps] => 4 )

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