Solved

preg replace for links

Posted on 2009-05-08
2
461 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 500 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

Secure Your WordPress Site: 5 Essential Approaches

WordPress is the web's most popular CMS, but its dominance also makes it a target for attackers. Our eBook will show you how to:

Prevent costly exploits of core and plugin vulnerabilities
Repel automated attacks
Lock down your dashboard, secure your code, and protect your users

Question has a verified solution.

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

Popularity Can Be Measured Sometimes we deal with questions of popularity, and we need a way to collect opinions from our clients.  This article shows a simple teaching example of how we might elect a favorite color by letting our clients vote for …
Many old projects have bad code, but the budget doesn't exist to rewrite the codebase. You can update this code to be safer by introducing contemporary input validation, sanitation, and safer database queries.
The viewer will learn how to look for a specific file type in a local or remote server directory using PHP.
This tutorial will teach you the core code needed to finalize the addition of a watermark to your image. The viewer will use a small PHP class to learn and create a watermark.

705 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