note 56620 deleted from function.ereg by tularis

Note Submitter: eregitate ---- It was really hard for me to get the next checker!!! I think the information displayed here is really scarce. I had to get a PHP book to get the following information: to indicate the start of a string : ^, nothing comes before it you'll need to escape the following characters (with a backslash \ ) : . \ ! + * ? [ ] ^ $ ( ) = ! < > | and : the characters above each have a special meaning, that's why you need to escape them to include them in a string. * means : match this pattern 0 or more times ? means : match this pattern exactly 1 time + means : match this pattern 1 or more times and $ means the definite end of a string, nothing may come afterward. With this information I could finaly check a complete string containing only a few allowed character types : ereg("^([-a-zA-Z0-9_\.\!@#\$&\*\+\=\|])*$" , $var) some of the other tips here let other character through like < and >, which I did not want to get past my check! Hope this helps out.