Compare the values of two arrays, and return the differences in PHP

Description

The following code shows how to compare the values of two arrays, and return the differences.

Example

//  w w  w.  ja v  a  2 s.c  o m
<?php
    $a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
    $a2=array("e"=>"red","f"=>"green","g"=>"Groovy");

    $result=array_diff($a1,$a2);
    print_r($result);
?>

The code above generates the following result.