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"apple", "b" => "banana"); $y = array("c" => "orange", "d" => "peach"); $z = $x + $y; // $x 与 $y 的联合 var_dump($z); echo "
"; var_dump($x == $y); echo "
"; var_dump($x === $y); echo "
"; var_dump($x != $y); echo "
"; var_dump($x <> $y); echo "
"; var_dump($x !== $y); ?>