array_diff_uassoc() function in php

array_diff_uassoc() function of PHP is used to calculate the difference of two or more associative arrays by using a user define function. It is an inbuilt function of PHP.

Syntax:

Here

1. $arr1 is the array which values is compared to others.
2. $arr2,$arr3 and $arrN are the arrays which values is compared to first array and the different values of first array is return as resulting array.
3. function is a user define function. We calculate the result with the help of this function

Example 1:

<?php
function user_function($x,$y)
{
if ($x===$y)
  {
  return 0;
  }
  return ($x>$y)?1:-1;
}
$arr1=array("fruit1"=>"mango","fruit2"=>"banana","fruit3"=>"pear");
$arr2=array("fruit4"=>"orange","fruit1"=>"mango","fruit3"=>"grapes");
$result=array_diff_uassoc($arr1,$arr2,"user_function");
print_r($result);
?>

Output: