string validating

hi all
i need to validate a string that must contain only characters, digits and
.. - _ characters

hi try this but don't work

if(!eregi("[a-z0-9_.-]",$str)) echo"error";

"Josh" <josh@despammed.com> schreef in bericht
news:bnto5m$15eu35$1@ID-203386.news.uni-berlin.de...
> hi all
> i need to validate a string that must contain only characters, digits and
> . - _ characters
>
> hi try this but don't work
>
> if(!eregi("[a-z0-9_.-]",$str)) echo"error";

Try : "[a-z0-9_.-]+" (for one or more occurances)


JW

*** Josh wrote/escribió (Fri, 31 Oct 2003 14:30:17 +0100):
> i need to validate a string that must contain only characters, digits and
> . - _ characters
>
> if(!eregi("[a-z0-9_.-]",$str)) echo"error";

[a-z0-9_\.-]+

Please note '.' is wildcard for any character, you have to escape it.


--
--
-- Álvaro G. Vicario - Burgos, Spain
--

"Alvaro G Vicario" <alvaro_QUITAR_REMOVE@telecomputeronline.com> schreef in
bericht news:dps8u5o3l42p$.100sl6dzo15ux.dlg@40tude.net...
>
> [a-z0-9_\.-]+
>
> Please note '.' is wildcard for any character, you have to escape it.
>

True, when the next character is a + or an *. As with the -, its use is
depending on its position within the character class.

JW

On 3-Nov-2003, "Janwillem Borleffs" <jw@jwscripts.com> wrote:

> "Alvaro G Vicario" <alvaro_QUITAR_REMOVE@telecomputeronline.com> schreef
> in
> bericht news:dps8u5o3l42p$.100sl6dzo15ux.dlg@40tude.net...
> >
> > [a-z0-9_\.-]+
> >
> > Please note '.' is wildcard for any character, you have to escape it.
> >
>
> True, when the next character is a + or an *. As with the -, its use is
> depending on its position within the character class.

Inside a character class a . matches only a period. Outside a character
class it matches any single character execpt newline. It may be modified by
+ or *, but they are not required. In the case above it matches only a
period with or without the backslash.

--
Tom Thackrey
www.creative-light.com
tom (at) creative (dash) light (dot) com
do NOT send email to jamesbutler@willglen.net (it's reserved for spammers)