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Find the difference between array

Sometimes we need to find the difference between arrays
In php there is a inbuilt function to find the difference between array.

For example :

<?php
$a1=array(0=>"Apple",1=>"Honda",2=>"Scoda");

$a2=array(3=>"Scoda",4=>"Honda",5=>"Ford");

print_r(array_diff($a1,$a2));

?> 

The output of the code above will be: 

Array ( [0] => Apple ) 


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