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如何学习PHP array_intersect()

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Release: 2016-06-13 09:29:38
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如何学习PHP array_intersect()

 定义和用法

array_intersect() 函数返回两个或多个数组的交集数组。

结果数组包含了所有在被比较数组中,也同时出现在所有其他参数数组中的值,键名保留不变。

注释:仅有值用于比较。

语法

array_intersect(array1,array2,array3...)

 

参数

描述

 

array1必需。与其他数组进行比较的第一个数组。

array2必需。与第一个数组进行比较的数组。

array3可选。与第一个数组进行比较的数组。可以有多个。

 

 

例子

"Cat",1=>"Dog",2=>"Horse"); $a2=array(3=>"Horse",4=>"Dog",5=>"Fish"); print_r(array_intersect($a1,$a2)); ?>

输出:

Array ( [1] => Dog [2] => Horse )

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