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@ 2013-11-11T09:05:00Z

<?php
$array = array('vk_group' => NULL,'vk_group1' => 'http://vk.com/id43886762','vk_group2' => NULL);

var_dump(array_sum($array));

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
array_sum: documentation ( source)

preferences:dark modelive preview

34.83 ms | 402 KiB | 5 Q