Hi all,
I want a regular expression process such that,
no characters except for the followings will not be allowed.
0-9 a-z A-Z   ~ @ # $ %  ( ) _  - +  =  [ ]  { }  < ? >
I create a web site with membership. I have a problem. Some body uses a username GUEST and someother get's the same username (in fact not the same, but displays as a same username, because,
second username  is GUESTx   where x replace with the code ALT+231
so  I want to give a sequence of characters to the user, such that user cannot use except for this crahcters.
I wrote all the characters above...
best regards...
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