PHP array_intersect() Function with Example

array_intersect() work is utilized to locate the coordinated components from at least two components. Capacity “array_intersect()”

thinks about the estimations of the primary cluster with different exhibits and returns coordinated components.

Syntax:

 array_intersect(array1, array2, [array3,...]);

Example:

 Input:
    $arr1 = array("Hello", "Hi", "Okay", "Bye!");
    $arr2 = array("Okay", "Hello", "Bye", "Hi");

    Function calling: 
    array_intersect($arr1, $arr2);

    Output:
    Array
    (
        [0] => Hello
        [1] => Hi
        [2] => Okay
    )

PHP code 1: Comparing two string arrays

<?php
    //input array1    
    $arr1 = array("Hello", "Hi", "Okay", "Bye!");
    //input array2
    $arr2 = array("Okay", "Hello", "Bye", "Hi");
    
    //finding matched elements
    $ans = array_intersect($arr1, $arr2);
    
    print_r ($ans);
?>

Output

Array
(
    [0] => Hello
    [1] => Hi
    [2] => Okay
)

PHP code 2:Comparing three arrays with strings & numbers

<?php
    //input array1    
    $arr1 = array(10, 20, 30, "Hello", 40, "Hi", 50);
    //input array2
    $arr2 = array(50, 60, "Hello", 70, 80);
    //input array3
    $arr3 = array(10, 20, "Hello", 50, "Hi", 30);
    
    //finding matched elements
    $ans = array_intersect($arr1, $arr2, $arr3);
    
    print_r ($ans);
?>

Output

Array
(
    [3] => Hello
    [6] => 50
)