use patterns found with ereg_replace

[hiasl]

Hi!

I use a ereg_replace to convert URLs in a press release into working links.

I use the following code:

echo ereg_replace("http://([^ ]*)", "<a href=\"http://\1\" target=\"_blank\">http://\1</a>", htmlentities($pm[text]));

That works!

Now it would be interesting to set the target of the <a> tag to "parent" if the URL points to a page within the same website and to set it to "blank" if the link goes somewhere else. I changed my code to:

echo ereg_replace("http://([^ ]*)", "<a href=\"http://\1\" target=\"".(strpos("www.pefc.", \1)?"parent":"blank")."\">http://\1</a>", htmlentities($faq[antwort]));

That doesn't work (which was easy to guess)

\1 contains the URL, however I didn't manage to use this in the strpos() function to detect the website's URL (which is www.pefc.).

Do the patterns found get written somewhere else (maybe into a real variable), which would be easy to access in strpos().

Thanks,
Matthias

[Anon]

You could get them elsewhere; chuck in another parameter to ereg_replace() and afterwards it'll contain an array of the parenthesied matches (with $array[1] corresponding to \1 and $array[0] to the whole matched string).

But I wonder if this could be done with a Perl-style executed replacement...Hmm...I'll get back to you on that.

[Anon]

Almost identical to your attempt (which is what made me think of the 'e' modifier). One gotcha was that the strpos() always evaluated either to false (no match) or 0 (match starting at 0th character) - which is equivalent to false. So the only time the test would succeed is when you don't want it to (some weird URL with "www.pefc." halfway through it or something). Hence the change to a substr() test.

echo preg_replace(
"|http://([^ ]*)|e",
"'<a href=\"http://\1\" target=\"'.((substr('\1',0,9)=='www.pefc.')?'parent':'blank').'\">http://\1</a>'",
htmlentities($faq[antwort]));

[Anon]

...and I am REALLY glad this forum didn't decide to escape every quote :-)

As a side note, if single-quotes weren't available, the replacement string would've been:

"\"<a href=\\"http://\1\\" target=\\"\" .((substr(\"\1\", 0, 9) == \"www.pefc.\") ? \"_parent\" : \"_blank\") .\"\\">http://\1</a>\""

[hiasl]

Thanks a lot!!

Matthias