vb.org Archive - Need a quick help regarding regular expression (P

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Jaffery

12-22-2009 06:08 PM

Need a quick help regarding regular expression (P

I need little help of any php programmer here for preg_replace.

What will be the regex to match following :

Code:

[img width=320 height=217]

Here value for width and height changes.

Actually I need it for cleaner.php , asking here as on vbulletin.com, there is not much help in this matter.

The Geek

12-22-2009 07:06 PM

Not 100% sure of what you're trying to do but this would grab the values from the above string:

\[img width=(\d*) height=(\d*)\]

so this:

PHP Code:


		
			
$subject = '[img width=320 height=217]';

$find = '/\[img width=(\d*) height=(\d*)\]/im';

$replace = 'width=\1 and height=\2';

$result = preg_replace($find, $replace , $subject);

would give you:

width=320 and height=217

Jaffery

12-23-2009 05:28 AM

Using cleaner.php, I need to change all instances of [img width=320 height=217] to [img] in my forum which I recently converted from smf to vb.

I will try it and let you know.

btw, just asking as I am still understanding regex, what does widht=\1 and height width=\2 stands for. ie. \1 and \2 , what they denote ?

Thanx :)

Update: Thanx buddy, it helped.

The Geek

12-23-2009 07:35 AM

Quote:

Originally Posted by Jaffery (Post 1936099)

in the regex I gave you, the first (\d*) goes into \1 and the second one goes into \2

Jaffery

12-28-2010 05:06 AM

I need little more help..

What would be regex to match following :
[youtube=425,350]

rather I need to convert :

Code:

[youtube=425,350]NN7XXCDqzVg[/youtube]

Code:

[video]http://www.youtube.com/watch?v=NN7XXCDqzVg[/video]

ForumsMods

12-28-2010 06:24 AM

Use the following regular expressions:

Code:

/\[youtube=(.*)\](.*)\[\/youtube\]/im

Jaffery

12-28-2010 07:54 AM

That would match whole following..

Code:

[youtube=425,350]NN7XXCDqzVg[/video]

However, I need to grab value which is in bold and then
Put it in :
[code][video]http://www.youtube.com/watch?v=NN7XXCDqzVg[/video]

I can do following:

PHP Code:


		
			
$subject = '[youtube=425,350]NN7XXCDqzVg[/youtube]';
$find = '/\[youtube=(\d*){3},(\d*){3}\][a-zA-Z-]*\[/youtube]/im';
$replace = '[video]http://www.youtube.com/watch?v=\3[/video]';
$result = preg_replace($find, $replace , $subject);

Now kindly advice if that is ok as I am still not confident in regex and had hardly used backreference before.

ForumsMods

12-28-2010 02:21 PM

Use this:

PHP Code:


		
			
$subject = '[youtube=425,350]NN7XXCDqzVg[/youtube]';
$find = '/\[youtube=(.*)\](.*)\[\/youtube\]/im';
$replace = '[video]http://www.youtube.com/watch?v=\2[/video]';
$result = preg_replace($find, $replace , $subject);

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