Compare the keys of two indexed arrays, and return the differences in PHP
Description
The following code shows how to compare the keys of two indexed arrays, and return the differences.
Example
/*from w w w . j a va 2s . c o m*/
<?php
$a1=array("red","green","blue","yellow");
$a2=array("red","green","blue");
$result=array_diff_key($a1,$a2);
print_r($result);
?>
The code above generates the following result.