The "array_uintersect_uassoc()" function computes the intersection of arrays with additional index check, compares values and keys by user defined functions to give the intersecting elements.

    array_uintersect_uassoc(array1,array2,array3...,function1,function2)

In the above syntax "array1" and "array2" are compared for keys in "function1", for values in "function2" ,then returns an array of intersecting elements from "array1".

   <?php
   function funct1_key($x1,$x2) 
    {
     if ($x1===$x2)
	 {
	 return 0;
	 }
     return 1;
    }
   function funct2_value($x1,$x2) 
    {
     if ($x1===$x2)
	{
	return 0;
	}
    return 1;
    }
   $a=array("a"=>"Orange","b"=>"Guava","c"=>"Apple");
   $b=array("a"=>"Orange","b"=>"Guava","c"=>"Guava");
   print_r(array_udiff_uassoc($a,$b,"funct1_key","funct2_value"));
   ?>

     Array ( [a]=> Orange [b]=> Guava );

In the above example the values and keys of both array elements are compared for keys in "funct1_key", and for values in "funct2_values" the intersection of values from "$a" is returned in an array.