?
Solved

Explain this preg_replace

Posted on 2004-08-26
6
Medium Priority
?
465 Views
Last Modified: 2010-10-05
Thanks to Nomad :http://experts-exchange.com/Web/Web_Languages/PHP/Q_21101766.html

this code works well for bold.  Now I need it for italics...
I have attempted to figure it out, but I come here to the experts.
Could someone give me the down and dirty of this code.  I know php OK, but not all the rules.


$text = preg_replace('/\\[b:[0-9a-f]+\\](.*)\\[\\/b:[0-9a-f]+\\]/Usi', '<b>\\1</b>', $announcement);

this is the code now showing.


[i:33cc0ee790]Paranoia[/i:33cc0ee790])

thank s
Rockman
0
Comment
Question by:rockmansattic
[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
  • 3
  • 2
6 Comments
 
LVL 27

Expert Comment

by:Diablo84
ID: 11908659
just a simple moddification to

$text = preg_replace('/\\[i:[0-9a-f]+\\](.*)\\[\\/i:[0-9a-f]+\\]/Usi', '<i>\\1</i>', $announcement);

should work
0
 
LVL 27

Accepted Solution

by:
Diablo84 earned 1700 total points
ID: 11908827
sorry just re-read question

/ start of pattern

[i: matches the start of the string from your pattern [i:

[0-9a-f]+ accepts one or more characters limited to 0-9 and a through to f

] matchs the end part of [i; after the numbers ]

(.*) brackets signify a group which is referenced later, 0 or more of any character

thats the general structure of the pattern

notice when the tags are replaced with <i>\\1</i>  \\1 represents the group above, can also be done with $1

more info on pattern syntax here: http://www.php.net/manual/en/reference.pcre.pattern.syntax.php
0
 
LVL 2

Assisted Solution

by:Andy_Neodynium
Andy_Neodynium earned 300 total points
ID: 11911440
How about :

$text = preg_replace('/\[([bui]):[0-9a-f]+\\](.*)\[\/([bui]):[0-9a-f]+\]/Usi', '<$1>$2</$3>', $announcement);

For all your bold, underline and italic needs in one go.

Note that I only use one slash to escape things like the square brackets (\[ not \\[)
I suspect that the \\ is escaping the slash, and then the square bracket is being treated like a class.
0
WordPress Tutorial 4: Recommended Plugins

Now that you have WordPress installed, understand the interface, and know how to install new parts, let’s take a look at our recommended plugins.

 
LVL 2

Expert Comment

by:Andy_Neodynium
ID: 11911443
How I tested it:

<?
$text = "[i:33cc0ee790]Paranoia[/i:33cc0ee790]";

$text = preg_replace('/\[([bui]):[0-9a-f]+\\](.*)\[\/([bui]):[0-9a-f]+\]/Usi', '<$1>$2</$3>', $text);

//             $1 is the same as //1, but preferred according to the manual

echo $text;
?>
0
 
LVL 10

Author Comment

by:rockmansattic
ID: 11912045
Thank you both,
Diablo84 did answer my question, So thats why you got most pts.  Thanks
Also, Andy_Neodynium 's part about [bui] is new to me and I will use this piece of code.

Thank you.
rockman
0
 
LVL 27

Expert Comment

by:Diablo84
ID: 11912070
no problem :)

|)iablo
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

Developers of all skill levels should learn to use current best practices when developing websites. However many developers, new and old, fall into the trap of using deprecated features because this is what so many tutorials and books tell them to u…
This article discusses four methods for overlaying images in a container on a web page
The viewer will learn how to count occurrences of each item in an array.
The viewer will learn how to look for a specific file type in a local or remote server directory using PHP.
Suggested Courses

765 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