Compare values of two arrays with user-defined function to compare values and return the matches in PHP

Description

The following code shows how to compare values of two arrays with user-defined function to compare values and return the matches.

Example

// ww w. j ava  2s .  c om
<?php
function myfunction($a,$b){
   if ($a===$b){
      return 0;
   }
   return ($a>$b)?1:-1;
}

$a1=array("a"=>"red","b"=>"green","c"=>"blue");
$a2=array("a"=>"blue","b"=>"Black","e"=>"blue");

$result=array_uintersect($a1,$a2,"myfunction");
print_r($result);
?>

The code above generates the following result.