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                ## 數組運算符 | 例子| 名稱 |結果 | | --- | --- | --- | | $a + $b |聯合 | $a 和 $b 的聯合。 | | $a == $b | 相等 | 如果$a和$b具有相同的鍵/值對則為true| | $a===$b |全等 | 如果$a和$b具有相同的鍵/值并且順序和類型相同則為TRUE | |$a!=$b |不等 | 如果$a不等于$b則為TRUE | | $a<>$b |不等 | 如果$a不等于$b則為TRUE | | $a!==$b |不全等 | 如果$a不全等$b則為TRUE | + 運算符把右邊的數組元素附加到左邊的數組后面,兩個數組中都有的鍵名,則只用左邊數組中的,右邊的被忽略。 ~~~ <?php $a = array("a" => "apple", "b" => "banana"); $b = array("a" => "pear", "b" => "strawberry", "c" => "cherry"); $c = $a + $b; // Union of $a and $b echo "Union of \$a and \$b: \n"; var_dump($c); $c = $b + $a; // Union of $b and $a echo "Union of \$b and \$a: \n"; var_dump($c); ?> ~~~ 執行后,此腳本會顯示: >Union of $a and $b: array(3) { ["a"]=> string(5) "apple" ["b"]=> string(6) "banana" ["c"]=> string(6) "cherry" } Union of $b and $a: array(3) { ["a"]=> string(4) "pear" ["b"]=> string(10) "strawberry" ["c"]=> string(6) "cherry" } 數組中的單元如果具有相同的鍵名和值則比較時相等。 Example #1 比較數組 ~~~ <?php $a = array("apple", "banana"); $b = array(1 => "banana", "0" => "apple"); var_dump($a == $b); // bool(true) var_dump($a === $b); // bool(false) ?> ~~~ 參見數組類型和數組函數章節。
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