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I have two arrays. I'd like to merge them into one, but remove the redundant values. How can I do this?

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Use array_unique function .

Example 

<?php $input = array("a" => "green", "red", "b" => "green", "blue", "red"); $result = array_unique($input); print_r($result); ?>

Output: 

Array ( [a] => green [0] => red [1] => blue )
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but this is only for single dimensional array... if multi dimensional array what we do..

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