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<?php function append(array $init, array $add, $key = null) { $_init = $init; if (is_null($key)) $_init[] = $add; else $_init[$key] = $add; return array_merge($_init, $init); } $a = [ 'body' => [ 'test' => 'test', ], ]; $b = [ 'my_test' => [ 1, 4, 9, 92 ], ]; var_dump(append($a, $b, 'body'));
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { ["body"]=> array(1) { ["test"]=> string(4) "test" } }

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