PHP - Function array_udiff()

Syntax

array_udiff( $array1, $array2 [, $array3 ..., $data_compare_func] );

Definition and Usage

It computes the difference of arrays by using a callback function for data comparison and returns an array containing all the values from array1 that are not present in any of the other arguments.

Parameters

Return Values

It returns an array containing all the values from array1 that are not present in any of the other arguments.

Example

Try out following example −

<?php
   function call_back_function($v1,$v2) {
      if ($v1 === $v2) {
         return 0;
      }
      return 1;
   }
   $array1 = array("a"=>"orange","b"=>"mango","c"=>"banana");
   $array2 = array("a"=>"orange","b"=>"mango","c"=>"apple");
   
   print_r(array_udiff_assoc($array1,$array2,"call_back_function"));
?> 

This will produce the following result −

Array ( [c] => banana )