Problem with preg_match

[fartsniff]

hello all,
here is a preg_match routine that i am using. basically, $image is set in
some
code above, and it can be either st-1.gif or sb-1.gif (actually it randomly
picks
them from about 100 gifs).

then it processes them based off of which image type it selected, either the
st- 's or
the sb- 's.

problem is, the preg_match that i have seems to only see the 's' then
assumes that it
"matched". if i leave the code in the order you see below, any "s" gif
matches as "sb-",
if i rearrange the code so that the preg_match "st-" is first, then any "s"
gif file matches
as "st-".

if (preg_match('`^[sb-]+.*(gif|jpg)$`' ,$image)) {
blah blah blah
}
elseif (preg_match('`^[st-]+.*(gif|jpg)$`' ,$image)) {
blah blah blah
}

[Ian.H [dS]]

Re: Problem with preg_match

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Whilst lounging around on Sat, 5 Jul 2003 23:44:34 -0800, "fartsniff"
<fart@sniff.com > amazingly managed to produce the following with
their Etch-A-Sketch:
[color=blue]
> hello all,
> here is a preg_match routine that i am using. basically, $image is
> set in some
> code above, and it can be either st-1.gif or sb-1.gif (actually it
> randomly picks
> them from about 100 gifs).
>
> then it processes them based off of which image type it selected,
> either the st- 's or
> the sb- 's.
>
> problem is, the preg_match that i have seems to only see the 's'
> then assumes that it
> "matched". if i leave the code in the order you see below, any "s"
> gif matches as "sb-",
> if i rearrange the code so that the preg_match "st-" is first, then
> any "s" gif file matches
> as "st-".[/color]


The regex is constructed wrongly =)

[color=blue]
>
> if (preg_match('`^[sb-]+.*(gif|jpg)$`' ,$image)) {[/color]
^^^^^^


This allows an 's', 'b' and / or '-' char to be used once or more,
hence it detects the 's' and returns true.

[color=blue]
> blah blah blah
> }
> elseif (preg_match('`^[st-]+.*(gif|jpg)$`' ,$image)) {
> blah blah blah
> }
>[/color]


Same as above for this regex match.

Try:


if (preg_match("#^ sb-([0-9]+)\.(gif|jpg)$# ", $image)) {


and likewise for your 'st-' requirement.

A program which might help you with RegEx patterns that comes highly
recommended:


The RegEx Coach

http://weitz.de/regex-coach/

HTH.



Regards,

Ian

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--
Ian.H [Design & Development]
digiServ Network - Web solutions
www.digiserv.net | irc.digiserv.ne t | forum.digiserv. net
Programming, Web design, development & hosting.

[fartsniff]

Re: Problem with preg_match

many thanks - your tip works great, the tool was a little difficult to
use but i found another one, regexdesigner.n et.

and i forgot, all but one are in this format, st-1, bm-1, etc.
the other is like this gc-ch-1 and using that tool i came up
with this:

elseif (preg_match("#^ gc-([a-z]+)-([0-9]+)\.(gif|jpg)$# ", $image)) {

thanks for getting me started. it would a ton easier if the "color coding"
of dreamweaver mx "separated" the regex expressions ;)

"Ian.H [dS]" <ian@WINDOZEdig iserv.net> wrote in message
news:3kofgv869n uh01ipjut75dk0g s4a5b7ed9@4ax.c om...[color=blue]
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Whilst lounging around on Sat, 5 Jul 2003 23:44:34 -0800, "fartsniff"
> <fart@sniff.com > amazingly managed to produce the following with
> their Etch-A-Sketch:
>[color=green]
> > hello all,
> > here is a preg_match routine that i am using. basically, $image is
> > set in some
> > code above, and it can be either st-1.gif or sb-1.gif (actually it
> > randomly picks
> > them from about 100 gifs).
> >
> > then it processes them based off of which image type it selected,
> > either the st- 's or
> > the sb- 's.
> >
> > problem is, the preg_match that i have seems to only see the 's'
> > then assumes that it
> > "matched". if i leave the code in the order you see below, any "s"
> > gif matches as "sb-",
> > if i rearrange the code so that the preg_match "st-" is first, then
> > any "s" gif file matches
> > as "st-".[/color]
>
>
> The regex is constructed wrongly =)
>
>[color=green]
> >
> > if (preg_match('`^[sb-]+.*(gif|jpg)$`' ,$image)) {[/color]
> ^^^^^^
>
>
> This allows an 's', 'b' and / or '-' char to be used once or more,
> hence it detects the 's' and returns true.
>
>[color=green]
> > blah blah blah
> > }
> > elseif (preg_match('`^[st-]+.*(gif|jpg)$`' ,$image)) {
> > blah blah blah
> > }
> >[/color]
>
>
> Same as above for this regex match.
>
> Try:
>
>
> if (preg_match("#^ sb-([0-9]+)\.(gif|jpg)$# ", $image)) {
>
>
> and likewise for your 'st-' requirement.
>
> A program which might help you with RegEx patterns that comes highly
> recommended:
>
>
> The RegEx Coach
> http://weitz.de/regex-coach/
>
>
>
> HTH.
>
>
>
> Regards,
>
> Ian
>
> -----BEGIN PGP SIGNATURE-----
> Version: PGP 8.0
>
> iQA/AwUBPwfjimfqtj2 51CDhEQLjwgCcCR NaQ9XGFuXZQ9aGj ygeAomsqS4An0+o
> 2gx4CHDuXRlUF0J leB5eyq54
> =4c0j
> -----END PGP SIGNATURE-----
>
> --
> Ian.H [Design & Development]
> digiServ Network - Web solutions
> www.digiserv.net | irc.digiserv.ne t | forum.digiserv. net
> Programming, Web design, development & hosting.[/color]