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@ 2014-03-03T12:37:56Z

<?php
$_POST['keywords']="sample products!@, products#$#, sample";
$keywords = preg_replace("/[^, \w]+/", '',($_POST['keywords']));
echo $keywords;

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preg_replace: documentation ( source)

preferences:dark modelive preview

34.01 ms | 402 KiB | 5 Q