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@ 2014-03-01T11:41:30Z

<?php
echo preg_match('@^(?!<)\w(?!(,|\.))@','test,');
echo preg_match('@^(?!<)\w(?!(,|\.))@','test');

Output
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preg_match: documentation ( source)

preferences:dark modelive preview

38.86 ms | 402 KiB | 5 Q