PHP array_diff() Function

The array_diff() function is an inbuilt function in PHP that compares two or more arrays and returns the differences, considering values only (not keys). This function was introduced in PHP 4.0.

Syntax


array array_diff ( array $array1 , array $array2 [, array $... ] );

Parameters

Parameter Description Is Compulsory
array1 The first array to compare. Compulsory
array2 The array to compare against. Compulsory
... Additional arrays to compare against. Optional

Return Values

The array_diff() function returns an array containing all the values from array1 that are not present in any of the other arrays.

PHP Example


<?php  
$array1 = array("red", "green", "blue", "yellow");  
$array2 = array("red", "blue", "pink");  
print_r(array_diff($array1, $array2));  
?>

Output

Array
(
[1] => green
[3] => yellow
)

PHP Example


<?php  
$array1 = array("apple", "banana", "cherry", "date");  
$array2 = array("banana", "date", "fig");  
$array3 = array("apple", "fig");  
print_r(array_diff($array1, $array2, $array3));  
?>

Output

Array
(
[2] => cherry
)