Regex help please!

[Matthew1980]

Hello all,

src="http://subsub.sub.sub.adomain.com/path/to/123456.text.gif"

I would like to know what the regex would be to capture the filename irrespective of what it is, but retrieve the file type so that I have a file name to work with. Then I can feed that into another function so that I can run a cron job and periodically 'check' this file.

If anyone has a better suggestion, please let me know.

Hope that makes sense.

Cheers,
MRb

[g1smd]

The filename will always be after the final slash.

The extension will always be after the final period.

There will be no need for any

(.*)

patterns at all; stuff like

(([^/]+/)*)

will strip the folder structure.

When you have found the filename and extension,

(([^.]+\.)+)([^./]+)

will split the filename and extension.

[timster]

Just to be sure we are on the same page, I am assuming you want to match the full filename and also the file extension from an image tag that points to a specific directory on a specific domain. Also note, this solution will only match the first image tag found in the supplied string.

preg_match(
'/src\=\"http\:\/\/subsub\.sub\.sub\.adomain\.com\/path\/to\/([\w\.]+\.(\w+))\"/',
$string,
$matches
);

$filename = $matches[1]; # Contents of the first backreference
$filetype = $matches[2]; # Contents of the second backreference

Note the parentheses:

([\w\.]+\.(\w+))

These identify “backreferences” which are returned by the matches array starting at index 1.