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<?php $a = [['id' => 1, 'foo' => 'bar']]; $b = [['id' => 3, 'foo' => 'nevim'], ['id' => 1, 'foo' => 'bar'], ['id' => 2, 'foo' => 'baz']]; var_dump(array_merge($a, $b));
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { [0]=> array(2) { ["id"]=> int(1) ["foo"]=> string(3) "bar" } [1]=> array(2) { ["id"]=> int(3) ["foo"]=> string(5) "nevim" } [2]=> array(2) { ["id"]=> int(1) ["foo"]=> string(3) "bar" } [3]=> array(2) { ["id"]=> int(2) ["foo"]=> string(3) "baz" } }

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