PHP array_diff() Function Usage and Example

PHP Array Function Manual

Definition and Usage

array_diff()The function compares arrays and returns the difference between two arrays (only compares key-value). It will compare array1Compares one or more arrays and returns array1does not appear in any other array.

Syntax

array array_diff ( array $array1, array $array2　[, array $array3　...] );

Parameter

Return Value

PHP Array Functions array_diff()Returns an array that includes all the values that are in array1 but not in any other parameter array. Note that the key names are retained.

PHP version

This function was first introduced in PHP version4.0.1introduced.

Online Example

See the following example of the array_diff() function returning the difference between two arrays-

<?php
　　　$array1　= array("orange", "banana", "apple");
　　　$array2　= array("orange", "mango", "apple");
　　　print_r(array_diff($array1, $array2));
?>

Output Result:

Array　
(　
　　　　[1] => banana　
)

Online Example

　$array1Multiple matches are processed in the same way in the example below. See the following example−

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

Output Result:

Array　
(　
　　　　[1] => blue　
)

PHP Array Function Manual