Anvery simple and easy to use function to test if a string contains only letters and numbers. By : mrbiiggy <?php /* lnonly stands for letters & numbers only.. this is just a little quick function to test if a string contains only letters and numbers... the only alternative function to this i've found must be built into php when compiling.. i like this a lot better and its comes in handy when checking entries on forms.. -mrb */ function lnonly($string) { $eregi = eregi_replace("([A-Z0-9]+)","",$string); if(empty($eregi)){ return true; } return false; } // example usage: /* if(letters($yourstring)) { echo "String Accepted"; } else { echo "String Rejected: <b>Bad Characters</b>"; } */ ?> | DISCLAIMER: The content provided in this article is not warranted or guaranteed by Developer Shed, Inc. The content provided is intended for entertainment and/or educational purposes in order to introduce to the reader key ideas, concepts, and/or product reviews. As such it is incumbent upon the reader to employ real-world tactics for security and implementation of best practices. We are not liable for any negative consequences that may result from implementing any information covered in our articles or tutorials. If this is a hardware review, it is not recommended to open and/or modify your hardware. |
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