Grab URL

Anon

I started with php for about 4 weeks ago and I still can't seem to figure out these damn regular expressions 🙁

What I want to do is grab urls from a file that match a certain start (for example, all urls starting with : http://www.host.com/something_more)

Suppose I would start off with this :

$file = fopen("urls.html","r");

Then how could/should I use an ereg to grab and view only the urls starting with "http://www.host.com/something_more" ?

Thx in advance 🙂

Dizzy

Anon

Isn't it easier to use the substr function?

if (substr($string, 1, 34) == 'http://www.host.com/something_more')) {
// found
} else {
// not found
}

Anon

Maybe, I don't know anything about that one, heh...

How can I echo the urls on the page then ?

Thx..

Anon

You'd just print them normally.

eg.

$url = "http://www.host.com/something_more/index.php";

if (substr($url, 1, 34) == 'http://www.host.com/something_more')) {
echo $url;
}

of you may want to put
echo '<A HREF="'.$url.'">'.$url.'</A>';
if you want to make it a link too.

Hope that helps,

Anon

Hmm, now I get a parse error 🙁

But does this really take all the links that match the starting of the url ?
and then view them all ?

it's all quiete vague for me at this point, hehe

I rly thought regex was needed ?

Anon

That example should take the string $url, and check if it begins with http://www[etc], and if it does, print it out. I'm not sure about teh parse error, what line was it? (I was just doin it off the top of my head, so it's probably a stupid little mistake somwhere).

Regex is powerful, but I don't think it's necessary for something that simple.

Anon

You'll want to loop through that, and use fgets to set $url to the next line in urls.html.

I'm assuming your urls.html is just one-line urls though. If it's a full page of html or something, and you're just wanting to find urls, then you'll need to search through it (and regex will probably be best there).

Anon

Exactly, hehe its a full html page ;-)

Anon

Well uhm, how could I create that regex ?

Anon

Uh oh, I was afraid you'd ask that...

I'm not very good with regex, especially in php. I use it in Perl a little, and it's supposed to be the same in php, but it's not!

Anyone good at regex reading this?!! HELP!

Anon

Can anybody please help me with this regex problem ?

Anon

Ok, how about:

$contents = fread($file, filesize("urls.html"));

preg_match("|http:\/\/www.host.com\/something_more(.*)[ \">]|i", $contents, $results)

and it should put the urls (minus the http://www.host.com/something_more, which you'll have to put back in), into the array $results ($results[0], $results[1] etc.)

If it doesn't work, let me know and I'll try and fix it.

Danny