[SOLVED] how does this site recognize websites?

[dadamssg]

when i type in a site...

 

http://www.google.com

 

it makes it a link? anyone point me in the right direction on how to do this?

[jackpf]

preg_match() and preg_replace() most probably.

[Maq]

If it matches a regex for a site, then surround it by   tags, if not, don't.

 

Do you need help with the regex?

[dadamssg]

yeah..more than that if youre willing to help though.i just don't really know how to write regex and then how to use preg_replace or whatever i need  :-\

[Maq]

yeah..more than that if youre willing to help though.i just don't really know how to write regex and then how to use preg_replace or whatever i need  :-\

 

k, moving to regex for further help.

[jackpf]

Probably something similiar to this

$url = preg_replace('/http\:\/\/(.*?)/i', '<a href="http://$1">$1</a>', $url);

[dadamssg]

so that will run through the content of my variable...its gonna be a long string of text and what-not. and if it sees http:// it will make it a link?

[jackpf]

Theoretically yes. I haven't tested it though. But it is something along the lines of that.

[allenskd]

although i'm not that experienced in regex, here an example that you can play with:

<?php
$test = 'http://google.com';
$url = preg_replace('#(?:http:[\/]{2})([a-z0-9-_]+)(.[a-z]{2,})#ui', '<a href="http://$1$2">$1</a>', $test);
echo $url;

 

sadly, it will ignore further extension of the link (eg. http://google.com/i/want/a/cookie , it will only stop at google.com)

 

Then again, you might want to be careful when creating this. For example in jackpf's post, you can add quotes, ampersand, and other symbols that can harm your site, since its doing a no-holds barred any characters may enter

[premiso]

<?php
function convertLinks($text) {
        $in=array(
        '`((?:https?|ftp)://\S+[[:alnum:]]/?)`si',
        '`((?<!//)(www\.\S+[[:alnum:]]/?))`si'
        );
        $out=array(
        '<a href="$1" >$1</a> ',
        '<a href="http://$1" >$1</a>'
        );
        return preg_replace($in,$out,$text);
    }

$string = "This is some text http://www.google.com and www.google.com and http://google.com but google.com does not work as clickable.";
$string = convertLinks($string);
echo $string;
?>

 

Should work. It is nearly impossible to do the google.com without the www. or http:// so yea. Hopefully that works for you.

 

EDIT:

As an fyi, I did not write that, I found it in the comments at preg_replace I just removed certain portions and renamed it.

[dadamssg]

sweet thanks...but this wouldn't make www.blahblah.com a link would it? it will have to have the http:// right?

[dadamssg]

just kidding...i looked at into it more...thanks a LOT premiso, really appreciate it