twinkle twinkle little star php array function sequence array_intersect returns the intersection array of two or more arrays

array_intersect() Definition and Usage
array_intersect() function returns the intersection array of two or more arrays.
The result array contains all values ​​that are in the compared array and 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...)

Parameters	Description
array1	Required. The first array to compare with other arrays.
array2	Required. The array to compare to the first array.
array3	Optional. The array to compare to the first array. There can be multiple.

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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