?
Solved

preg replace for links

Posted on 2009-05-08
2
Medium Priority
?
462 Views
Last Modified: 2012-08-14
hello there,
I have a little function for links to replace them from a string and its working fine..
I would like to add something so that if there is an image inside the link to ignore the replace
for example this code does this




$post = preg_replace('/\[url="?([^\]"]+)[\]"].*/i', '$1', $post);
 
[URL="http://google1.com"]google is a search engine[/URL]
[URL=http://google2.com]google is a search engine[/URL]
[URL=http://googleimg.com][IMG]http://google.com/logo.jpg[/IMG][/URL]
 
into
 
http://google1.com
http://google2.com
http://googleimg.com
 
 
im trying to do something so if there is [img] tags inside the [url] to NOT do a replace...
how can I do that?

Open in new window

0
Comment
Question by:XK8ER
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
2 Comments
 
LVL 8

Expert Comment

by:fcardinaux
ID: 24342537
Is $post a text where there can be any number of links ?

If not, if each $post only consists in one link, you can do this:

<?php
 
$posts = array(
    '[URL="http://google1.com"]google is a search engine[/URL]',
    '[URL=http://google2.com]google is a search engine[/URL]',
    '[URL=http://googleimg.com][IMG]http://google.com/logo.jpg[/IMG][/URL]');
 
foreach ($posts as $post) {
    
    if (false === stripos($post, '[img]')) {
        $post = preg_replace('/\[url="?([^\]"]+)[\]"].*/i', '$1', $post);
    }
    
    echo "$post<br>\n";
}
 
?>

Open in new window

0
 
LVL 8

Accepted Solution

by:
fcardinaux earned 2000 total points
ID: 24342626
In the other situation, you need to start by transforming the image links into a different, unmatchable pattern, then to replace the URLs, and finally to transform the image links back to their original pattern.
<?php
 
$post = <<<ENDOFPOST
Everybody knows that [URL="http://google.com"]google dot com[/URL] is a search engine, and 
that [URL=http://yahoo.com]yahoo dot com[/URL] is a search engine as well. Here is google's
logo: [URL=http://googleimg.com][IMG]http://google.com/logo.jpg[/IMG][/URL]. Enjoy!
ENDOFPOST;
 
$post = preg_replace('/\[url="?([^\]"]+)"?\]\[img\]([^\[]*)\[\/img\]\[\/url\]/i', '{~I~$1~M~$2~G~}', $post);
$post = preg_replace('/\[url="?([^\]"]+)"?\][^\[]*\[\/url\]/i', '$1', $post);
$post = preg_replace('/\{~I~([^~]*)~M~([^~]*)~G~\}/i', '[URL="$1"][IMG]$2[/IMG][/URL]', $post);
    
echo "$post<br>\n";
 
?>

Open in new window

0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I imagine that there are some, like me, who require a way of getting currency exchange rates for implementation in web project from time to time, so I thought I would share a solution that I have developed for this purpose. It turns out that Yaho…
There are times when I have encountered the need to decompress a response from a PHP request. This is how it's done, but you must have control of the request and you can set the Accept-Encoding header.
The viewer will learn how to count occurrences of each item in an array.
The viewer will learn how to create and use a small PHP class to apply a watermark to an image. This video shows the viewer the setup for the PHP watermark as well as important coding language. Continue to Part 2 to learn the core code used in creat…
Suggested Courses

762 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question