PHP array_diff() function

This function is used to get array differences. This function returns those values from the first array that are not present in other arrays. So by using this, we can compare one array elements from one or more arrays elements.

Syntax

array_diff($array1, $array2, $array3, ...);

In this, we can pass two or more arrays in parameters. But it always returns array values from the first parameter that are not present in any of the other arrays.

Example1

<?php
    $arr1 = array('pen', 'pencil', 'book', 'copy');
    $arr2 = array('book', 'copy');
    $get_diff = array_diff($arr1, $arr2);
    print_r($get_diff);
?>

Output :

Array ( [0] => pen [1] => pencil )

Example2

<?php
    $arr1 = array(1, 5, 7, 3 , 10);
    $arr2 = array(4, 5, 2, 5, 7, 89);
    $arr3 = array(5, 7, 4, 6, 8);
    $get_diff = array_diff($arr1, $arr2, $arr3);
    Print_r($get_diff);
?>

Output :