PHP array加法操作的解决办法

这篇文章主要为大家详细介绍了PHP array加法操作的简单示例，具有一定的参考价值，可以用来参考一下。

对此感兴趣的朋友，看看idc笔记做的技术笔记！

The + operator appends elements of remaining keys from the right handed array to the left handed, whereas duplicated keys are NOT overwritten.今天 再次看 php manual的时候，才知道

代码如下:

 
<?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); 
?> 

代码如下:

 
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" 
} 

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