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

Description

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

Example

// w w w . ja  va 2  s . co  m
<?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("d"=>"red","b"=>"Basic","e"=>"blue");

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

The code above generates the following result.