php数组函数序列之array_intersect() 返回两个或多个数组的交集数组
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
复制代码 代码如下:
$a1=array(0=>"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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