PHP addition operation example code in array_PHP tutorial

PHP 在数组中加法运算操作实例代码

2.         $a = array("a" => "apple", "b" => "banana");
3.         $b = array("a" => "pear", "b" => "strawberry", "c" => "cherry");
4.         $c = $a $b; // Union of $a and $b
5.         echo "Union of $a and $b: ";
6.         var_dump($c);
7.         $c = $b $a; // Union of $b and $a
8.         echo "Union of $b and $a: ";
9.         var_dump($c);
10. ?>
13.         array(3) {
14.         ["a"]=>
15.         string(5) "apple"
16.         ["b"]=>
17.         string(6) "banana"
18.         ["c"]=>
19.         string(6) "cherry"
20.         }
21.         Union of $b and $a:
22.         array(3) {
23.         ["a"]=>
24.         string(4) "pear"
25.         ["b"]=>
26.         string(10) "strawberry"
27.         ["c"]=>
28.         string(6) "cherry"
29.         }
30. ?>

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