How to learn PHP array

Definitions and usage

The Array_intersect () function returns an array of intersections of two or more arrays.

The resulting array contains all the values that are in the array of comparisons and all other parameter arrays, and the key name remains unchanged.

Note: Only values are used for comparisons.

Grammar

Array_intersect (Array1,array2,array3 ...)

Parameters

Describe

Array1 required. The first array to compare with the other arrays.

Array2 required. The array to compare with the first array.

Array3 Optional. The array to compare with the first array. can have multiple.

Example

<?php $a 1=array (0=> "Cat",1=> "Dog",2=> "horse"); $a 2=array (3=> "horse",4=> "Dog",5=> "Fish"); Print_r (Array_intersect ($a 1, $a 2));?>

Output:

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