Topic awaiting preservation: regexp help please. (Page 1 of 1)

how do i get the extension of a file which i have saved as string. so:

"blabla.html" returns "html"
"pic.jpg" returns "jpg"

edit: im talking php.



[This message has been edited by GRUMBLE (edited 10-13-2002).]

No need for regular expressions...

$filename = "image.gif";
$ext = strtolower(substr(strrchr($filename, "."), 1));

hooray! it works!

thanks max!

another string related question.

say i get my uri with $REQUEST_URI:

"/blabla/prototyp/de/heiho.php?xy=z"

and i wanna check if the string "/de/" is somewhere in that big string how do i do that?

thanks.

I'd probably use dirname() and then explode() it and check through the array but I'm sure mr.maX has a much more efficient way of doing it (I would have suggested exploded the file name too and checking for $filename_bits[1])

___________________
Emps

FAQs: Emperor

it worked! thanks!

OK cool - if people are going to be doing a lot splitting and playing with URLs they might be interested in this function:
http://www.php.net/parse-url

___________________
Emps

FAQs: Emperor

wow. that's interesting too.
but i only need one small part of the url:

.../xyz/de/content/...

i need to check if its "de" or "en" in there.
the explode works fine for me.

thanks!

GRUMBLE: I'm glad it helped

I threw a few more solutions at him over ICQ so I'll pass them on (the one's above seem fine for this problem but some may one day wander in looking for a variation on a theme):

Regular expressions:

Something like this would also work:

if (preg_match ("/\bde\b/i", $url_path)) {



   }

mod_rewwrite:

clean up the URLs and use something like this:

<BLOCKQUOTE><FONT face="Verdana, Arial">code:</font><HR><pre>
/([0-9]+)/(de

The following code is much more effective than using explode()...

$pos = strpos(getenv('REQUEST_URI'), '/de/');
if ($pos === false) { // <-- three '=' signs
&nbsp;&nbsp;&nbsp;&nbsp;// '/de/' doesn't exist
}

BTW You can easily modify if statement by adding '!' (not) operator if you want to check if '/de/' exists...