PHP array function sequence array_intersect() returns the intersection array of two or more arrays_PHP tutorial

array_intersect() Definition and Usage

array_intersect() function returns the intersection array of two or more arrays.

The result array contains all values ​​in the compared array that also appear in all other parameter arrays, and the key names remain unchanged.

Note: Only values ​​are used for comparison.

Syntax
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。

Example

Copy code The code is as follows:

$a1=array (0=>"Cat",1=>"Dog",2=>"Horse");
$a2=array(3=>"Horse",4=>"Dog", 5=>"Fish");
print_r(array_intersect($a1,$a2));
?>

Output:

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

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