RegEx...

AdamBrill

I am trying to search through a string, find [link][/link] and turn it into a link. So if the string is:

This is a link: [link]http://www.yahoo.com[/link]

It would turn it into this:

This is a link: <a href="http://www.yahoo.com">http://www.yahoo.com</a>

How can this be done? I have this:

$string = ereg_replace ("[link](.*)[\/link]", "<a href=\"\"></a>", $string);

but I don't know how to get what was between the [link] tags and put it back into the string. Any help would be greatly appreciated. 🙂

dalecosp

Here's a quick-n-dirty from the user-contrib notes on substr() :

Example:
$haystack = 'please<a href="/manual/add-note.php">click here</a>';

$start = '<a href="';
$end = '">';
$found = get_string($haystack, $start, $end);
echo $found;

...might do it for ya...thanks to the dude from camelquotes...

Blob

So you'd do...

$link = "[link]www.site.com[/link]"
$startlink = "[link]"
$endlink = "[/link]"
$url = get_string($link, $startlink, $endlink); // Found the link.

$link = ereg_replace ("\[link\](.*)\[\/link\]", "<a href=\"$url\"></a>", $link);

AdamBrill

Is get_string a command? When I run the PHP, it is telling me that there isn't such a command. And php.net doesn't have it listed either...

ednark

be careful about greed in regular expressions

link[/link]

might skip over several "[/link]" strings and only stop on the last one... hence not giving you what you want

im not so familiar with the ereg syntax but be sure to check about this

planetsim

Never used REgex with ereg_replace before so anyways give this a try.

$string = ereg_replace ("[link](.*?)[\/link]", "<a href=\"//2\">//2</a>", $string);

dalecosp

Sorry Adam....I read the whole thing, but apparently didn't c&p it all...

Here's the entire post:

This returns the string between 2 delimiters:

Example:
$haystack = 'please<a href="/manual/add-note.php">click here</a>';

$start = '<a href="';
$end = '">';
$found = get_string($haystack, $start, $end);
echo $found;

prints:
/manual/add-note.php

NOTE -- NO ERROR CHECKING IS DONE!

function get_string($h, $s, $e)
{
$sp = strpos($h, $s, 0) + strlen($s);

$ep = strpos($h, $e, 0);
return substr($h, $sp, $ep-$sp);

}

Quick and dirty... Very dirty!