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<?php $collection = array( Array ( 'one' => 10, 'two' => 20, 'three' => 50, 'four' => 80, 'five' => 100 ), Array ( 'three' => 20, 'five' => 20, 'six' => 100, 'seven' => 10 ), Array ( 'one' => 30, 'three' => 30, 'five' => 10, 'eight' => 10 )); Foreach($collection[0] as $key => $val){ $array = array_column($collection, $key); If(count($array) == count($collection)){ $avg[$key] = array_sum($array)/count($array); } } Var_dump($avg);
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { ["three"]=> float(33.333333333333336) ["five"]=> float(43.333333333333336) }

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