<?php $values = '222-333-4545'; if (strlen($values) > 0 && !preg_match('/^[1]{0,1}-[0-9]{3}-[0-9]{3}-[0-9]{3,4}$/', $values)) { $err_msg[4] = ('Phone number must be in format xxx-nnn-nnnn.'); echo $err_msg[4]; }
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