making links HELP!!!

jonsof

i have a text area and i want someone being able to write links like in forums, when you write www.phpbuilder.com then it is translated into a link.

Is this possible?

planetsim

Yes its possible. You need to use regex.

I think there was something on making a url from a textbox become a link on these boards. But i cannot find the link to help you out.

cahva

This is taken straight from php.net:

$text='Hey I found a nice site. Its www.phpbuilder.com take a look.';


$vdom = "[:alnum:]";                // Valid domain chars
$vurl = $vdom."_~-";                // Valid subdomain and path chars
$vura = $vurl."A-?a-y!#$%&*+,;=@."; // Valid additional parameters (after '?') chars;
                               // insert other local characters if needed
$protocol = "[[:alpha:]]{3,10}://"; // Protocol exp
$server = "([$vurl]+[.])+[$vdom]+"; // Server name exp
$path = "(([$vurl]+([.][$vurl]+)*/)|([.]{1,2}/))*"; // Document path exp (/.../)
$name = "[$vurl]+([.][$vurl]+)*";   // Document name exp
$params = "[?][$vura]*";            // Additional parameters (for GET)

$text = ereg_replace("($protocol)?($server(/$path($name)?)?)", "<a href=\"http://\\2\">\\0</a>", $text); // URL into links

echo $text;

jonsof

Hmm.
Where did you find this snippet exactly?
It didn;t work a i expected, i cut and pasted as it is and "take a look" transformed to a link which points to "http://0". 🙁🙁

is there any other method, i have seen dialboxes for that reason or not?

jonsof

any other ideas?

daphreeek

$text = ereg_replace("([[:alnum:]]{2,6}://)([[:alnum:].-_])+([[:alnum:]]{2,6})+(/[[:alnum:]_-~\.])?","<a href=\"\\0\">\\0</a>", $text);

$text = ereg_replace ('[_a-zA-z0-9\-]+(\.[_a-zA-z0-9\-]+)*\@' . '[_a-zA-z0-9\-]+(\.[a-zA-z]{1,3})', '<a href="mailto:\\0">\\0</a>', $text);

They work well. The top does the links (only works if there is [url]http://[/url] or [url]ftp://[/url] or something://) and the bottom makes emails into links also.

Note though that the one for links needs a bit more added if you want variables passed after the ? 🙂

Hope that helps 🙂
- Matt

jonsof

But what in case i want to edit the post. I don't want any of my users to see the html code <a href="blah blah">blah blah</a>.

Would be wise for someone to use some type of points like this below

[-url-]link[-/url-] (the - is unneseccary!)

What is the code in this case?

daphreeek

$text = ereg_replace("\[url\](.*)\[/url\]","<a href=\"\\1\">\\1</a>", $text);
$text = ereg_replace("\[email\](.*)\[/email\]","<a href=\"mailto:\\1\">\\1</a>", $text);

They work 🙂 top=links, bottom=email. you can use both at once

Matt

jonsof

Originally posted by jonsof
But what in case i want to edit the post. I don't want any of my users to see the html code <a href="blah blah">blah blah</a>.

daphreeek

then do it when producing the page, not when saving the data.

eg: user enters into a form and that text is saved to a database as is. when editing that post, the exact text from the database is shown (thus no HTML link code). when showing the text (on a forum or web page) use the ereg_replace() commands to change the links to HTML dynamically.

There u go 🙂
- Matt

altexis

if you need to hide the link... here is an idea that might help:
include a javascript file inside your main html file
which is only going to print the <a> tag... something like document.write('<a href="myhiddenlink.html">click here</a>');

then put this javascript (.js) file into a directory that requires a password!

Don't know if this will work... but try it out 🙂

altexis

oh... one more sneaky idea 🙂😉
The superb Internet Exploder gets confused when it opens exactly the same page more than once....
If you do that and then try to "view source" Internet Exploder never shows you the source code....
so write your links in any way you like... then add a refresh meta tag only at the first show of your html page

The page will refresh once, the user will never see the source code....

Ehmm... of course the link will show at the status bar of the browser but then you can also add a javascript timer to scroll a message on the status bar and thus hide the link hehehe

jonsof

Originally posted by daphreeek
$text = ereg_replace("\[url\](.*)\[/url\]","<a href=\"\\1\">\\1</a>", $text);
$text = ereg_replace("\[email\](.*)\[/email\]","<a href=\"mailto:\\1\">\\1</a>", $text);
They work 🙂 top=links, bottom=email. you can use both at once

Matt [/B]

They didn;t work 🙁🙁

daphreeek

the first should work nicely 🙂 you mucst have [url]http://[/url] at da start of the link

The second didnt coz thsi board changes bits around - its easy enuff 2 rite ur own regular expressions - take a look at the php manual

Matt

jonsof

i wrote the following


<?
$text="my page [u r l]http://www.jonsof.tk[/u r l]";
$text = ereg_replace("[u r l](.*)[/u r l]","<a href=\"\1\">\1</a>", $text);
echo $text;?>

And the output is : my page []

Where is the problem? Could you explain why do you put the 1 in the html tag? Is a specific code?

jonsof

i used the code below

<?
$text="my page [u r l]http://www.jonsof.tk[/u r l]";
$text = preg_replace("/\[url\]([^\[\]]+)\[\/url\]/", "<a href=\"\\1\">\\1</a>", $text);
echo $text;?>

and worked! But could i write something like


[u r l]www.jonsof.tk[/u r l]

in order to output a working html tag without http?

daphreeek

the 1 in the code is actually \1 and stands for (inserts) the first item in brackets in ur regular expression.

eg:
(matt)(me)(blah)

to output matt \1
to output me \2
to output blah \3

to output all (mattmeblah) \0

thats how i understand it anyways 🙂 proove me rong if u must

Matt

jonsof

now the problem is i must always put [url]http://[/url] before the link, is it necessary because unless i put it then the link points somewhere in the local disk!