Just some help related to preg_replace()

[matthewlesh]

i know this is kinda dume but i am a newbie and working on a username validating system...

 

and it needs to do the following things...

 

Only allow lowercase letters

Allow numbers

Allow "_" and "$"

 

and not allow anything else...

 

and if it does not go by this print an error out.

 

Please help:D

[neel_basu]

First of all you should post it in regex forum

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Your subject is "Just some help related to preg_replace()"

But there is nothing about replacing in your Question

Its all about ereg() and preg_match()

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Use this regex with ereg() or preg_match()

[0-9_\$]+

[Psycho]

<?php

if (ereg("^[a-z0-9_\$]+$", $username)) {
echo "Valid";
} else {
echo "Not Valid";
}

?>