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<?php function prune_leaves($array) { foreach($array as $k => $v) { if ($v === null) unset($array[$k]); if (is_array($v)) prune_leaves($v); } return $array; } $test1 = ['a' => 123, 'b' => ['c' => null]]; var_dump(prune_leaves($test1));
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { ["a"]=> int(123) ["b"]=> array(1) { ["c"]=> NULL } }

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