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Link: http://codepad.org/eC4FR2fq    [ raw code | output | fork ]

PHP, pasted on Mar 16: 
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<?php

$teachers=array(array('post_id' => "81",'video_id' => array("81","73")), array('post_id' => "81",'video_id' => array("81","73")));

print_r(array_unique($teachers));


Output: 
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Array
(
    [0] => Array
        (
            [post_id] => 81
            [video_id] => Array
                (
                    [0] => 81
                    [1] => 73
                )

        )

)


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