PHP array_udiff() Function

The array_udiff( ) function is an inbuilt function of PHP. The array_udiff( ) function is used to compute the difference of given arrays by using a callback function for data comparison. This function was introduced in PHP 5.1.0.

Syntax

Parameters

Return Values

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

Important note:

User-defined function must returns an integer <, =, or > than 0 if the first argument is <, =, or > than the second argument.

Example 1

Output:

 Array ( [a] => A [b] => HTML [c] =>javatpoint ) 

Example 2

Output:

 Array ( [c] => ruby ) 

Example 3

Output:

 Array ( [d] => Java [r] => HTML ) 

Example 4

Output:

 Array ( [a] =>bengaluru [b] =>chennai )