PHP Tutorial - PHP array_intersect_uassoc() Function

Definition

The array_intersect_uassoc() function compares the keys and values of two or more arrays, and returns the matches by using a user-defined key comparison function.

Syntax

PHP array_intersect_uassoc() Function has the following syntax.

array_intersect_uassoc(array1,array2,array3...,myfunction)

Parameter

Parameter	Is Required	Description
array1	Required.	Array to be compared with
array2	Required.	Array to be compared with array1
array3,...	Optional.	Array to be compared with array1
myfunction	Required.	Function used to do the comparison

myfunction defines a callable comparison function. The comparison function must return an integer <, =, or > than 0 if the first argument is <, =, or > than the second argument.

Example

Intersect associate array with user defined function


<?php/*from w  w w . ja v  a2s  .  c om*/
    function myfunction($a,$b){
        if ($a===$b){
          return 0;
        }
        return ($a>$b)?1:-1;
    }
    
    $a1=array("a"=>"A","b"=>"Bed","c"=>"Cat","j"=>"java2s.com");
    $a2=array("d"=>"Dog","b"=>"Bed","p"=>"PHP");
    
    $result=array_intersect_uassoc($a1,$a2,"myfunction");
    print_r($result);
?>

The code above generates the following result.