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<?php $basket = [ [ 'name' => 'apple', 'qty' => 5, ], [ 'name' => 'apple', 'qty' => 4, ], [ 'name' => 'pear', 'qty' => 4, ] ]; $x = array_reduce($basket,function($total_qty, $e){ return $total_qty += $e['qty']; }, 0); var_dump($x);
Output for 5.6.38, 7.1.0 - 7.1.23, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.21, 8.3.0 - 8.3.9
int(13)

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