3v4l.org

run code in 300+ PHP versions simultaneously
<?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 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
array(2) { ["three"]=> float(33.333333333333336) ["five"]=> float(43.333333333333336) }
Output for 7.0.0 - 7.0.25, 7.1.0 - 7.1.33, 7.2.6 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
array(2) { ["three"]=> float(33.333333333333) ["five"]=> float(43.333333333333) }
preferences:
118.87 ms | 408 KiB | 5 Q