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<?php $arr = [ [ [4,4,6,8,7,4,3], [4,4,6,8,7,4,3], ], [ [4,4,6,8,7,4,3], [43,6,8,31,2,1], ], [4,5,6,8] ]; function sumRecursive($carry, $item) { if(is_array($item)){ return array_reduce($item, 'sumRecursive', $carry); } return $carry+$item ; } $sum = sumRecursive(0, $arr); var_dump($sum);
Output for git.master, git.master_jit, rfc.property-hooks
int(222)

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