$a = [1,2];        $b = [1,'2'];        var_dump($a == $b); // true        var_dump($a === $b); // false        $c = ['ab'=>'ab',1,2];        $d = ['ab'=>'ab',1,2];        var_dump($c == $d); // true        var_dump($c === $d); // true        $e = ['ab'=>'ab',1,2,['b'=>'b']];        $f = ['ab'=>'ab',1,2,['b'=>'b']];        var_dump($e == $f); // true        var_dump($e === $f); // true        $g = ['ab'=>['c'=>'c','d'=>['e'=>'e']],1,2,['b'=>'b']];        $h = ['ab'=>['c'=>'c','d'=>['e'=>'e']],1,2,['b'=>'b']];        var_dump($g == $h); // true        var_dump($g === $h); // true        $m = new static();        $n = new static();        var_dump($m == $n); // true        var_dump($m === $n); // false        exit;