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php实现两个数组相加的方法_PHP

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Release: 2016-05-31 13:16:58
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本文实例讲述了php实现两个数组相加的方法。分享给大家供大家参考。具体如下:

实例1:

<&#63;php
$arr1 = array("a"=>"朝阳区","b"=>"海淀区");
$arr2 = array("h"=>"西城区","a"=>"东城区","b"=>"丰台区");
$arr = $arr1 + $arr2;
echo "<pre class="brush:php;toolbar:false">";
print_r($arr);
&#63;>
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输出结果如下:

Array
(
  [a] => 朝阳区
  [b] => 海淀区
  [h] => 西城区
)
Copy after login

改变相加的顺序,实例2:

<&#63;php
$arr1 = array("a"=>"朝阳区","b"=>"海淀区");
$arr2 = array("h"=>"西城区","a"=>"东城区","b"=>"丰台区");
$arr = $arr2 + $arr1;
echo "<pre class="brush:php;toolbar:false">";
print_r($arr);
&#63;>
Copy after login

输出结果如下:

Array
(
  [h] => 西城区
  [a] => 东城区
  [b] => 丰台区
)
Copy after login

从上面两个实例比较,可以看出:

(1)相加是后面一个数组,加入到前面一个数组中;
(2)键名相同时,不会被覆盖。

希望本文所述对大家的php程序设计有所帮助。

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