Substr of a regular expression

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May 9th, 2008, 02:40 AM

Jenkz

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Substr of a regular expression

I am currently using this code to auto link any http://www.hyperlinks.com/

PHP Code:


		
			
 $string = preg_replace("#(^|[\n ])([\w]+?://[\w\#$%&~/.\-;:=,?@\[\]+]*)#is", "\\1<a href=\"javascript:URLcheck('\\2');\">\\2</a>", $string);

I want to make sure the \\n component between the <a></a> tags is truncated to a maximum of 30 chars.

How can I use substr (or other) in this instance?

May 9th, 2008, 02:52 AM

requinix

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Yeah, but it takes a little bit more work.

Here's one way of doing it:

PHP Code:


		
			
 preg_replace('#(^|\s)(\w+://[\w\#$%&~/.\-;:=,?@\[\]+]*)#es', '"\1<a href=\"javascript:URLcheck(\'\2\');\">".substr("\2",0,30)."</a>"', $string);

The #e flag means the replacement text is actually PHP code to be evaluated.

(I made a small change or two to the expression)

And you should use the onclick event instead of sticking JavaScript in the href.

Code:

<a href="#" onclick="URLcheck('\2');">

Comments on this post

Jenkz agrees: Thanks requinix

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May 9th, 2008, 03:13 AM

Jenkz

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For reference, this is the code I am currently using.

PHP Code:


		
			
 $string = preg_replace('#(^|\s)(\w+://[\w\#$%&~/.\-;:=,?@\[\]+]*)#es', '"\1<a href=\"#_\" onclick=\"javascript:URLcheck(\'\2\');\">".substr("\2",0,30)."...".substr("\2",-30)."</a>"', $string);

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