Regex to strip HTML comments - GoFuckYourself.com

redwhiteandblue · 11-24-2009, 06:19 AM

Trying to strip HTML comments from a web page, someone else must have done this.

I'm using

Code:

$page = preg_replace('/<!--(.|\s)*?-->/', '', $page

which works most of the time but sometimes causes an error. Is there a more reliable one?

miXXXture · 11-24-2009, 06:25 AM

http://php.net/manual/en/function.strip-tags.php

redwhiteandblue · 11-24-2009, 06:40 AM

Quote:

Originally Posted by miXXXture

http://php.net/manual/en/function.strip-tags.php

Nope, I don't want to strip all HTML tags - ONLY the HTML commented code ( and everything in between pairs of these).

fris · 11-24-2009, 07:06 AM

try 

instead

redwhiteandblue · 11-24-2009, 08:51 AM

Quote:

Originally Posted by fris

try 

instead

Tht's probably what I started with but surely will just catch everything between the first opening comment tag and the last closing one?

cyco_cc · 11-24-2009, 10:03 AM

Quote:

Originally Posted by redwhiteandblue

Tht's probably what I started with but surely will just catch everything between the first opening comment tag and the last closing one?

No, the '?' part makes it non-greedy so it will match the first closing.

Edit: When is your regex breaking? The // one?

Tom_PM · 11-24-2009, 10:07 AM

I was looking all through my old scripts for that to help you, but I think you've got it now.

redwhiteandblue · 11-24-2009, 11:04 AM

Quote:

Originally Posted by cyco_cc

Edit: When is your regex breaking? The // one?

Don't know, on most pages it happily strips out comments but on some it just returns null and I haven't figured out what the difference is with those pages yet.

EDIT just spotted this comment in the PHP user manual:

"As a pertinent note, there's an issue with this function where parsing any string longer than 94326 characters long will silently return null. So be careful where you use it at. "

Could be it.

11-24-2009, 06:19 AM	#1
redwhiteandblue Bollocks Industry Role: Join Date: Jun 2007 Location: Bollocks Posts: 2,792	Regex to strip HTML comments Trying to strip HTML comments from a web page, someone else must have done this. I'm using Code: $page = preg_replace('/<!--(.\|\s)*?-->/', '', $page which works most of the time but sometimes causes an error. Is there a more reliable one? __________________ Interserver unmanaged AMD Ryzen servers from $73.00

11-24-2009, 07:06 AM	#4
fris Too lazy to set a custom title Industry Role: Join Date: Aug 2002 Posts: 55,262	try <!--(.*?)--> instead __________________ Since 1999: 69 Adult Industry awards for Best Hosting Company and professional excellence. WP Stuff

11-24-2009, 10:07 AM	#7
Tom_PM Porn Meister Industry Role: Join Date: Feb 2005 Posts: 16,443	I was looking all through my old scripts for that to help you, but I think you've got it now. __________________ 43-922-863 Shut up and play your guitar.

11-24-2009, 06:25 AM	#2
miXXXture Confirmed User Industry Role: Join Date: Jul 2009 Posts: 217	http://php.net/manual/en/function.strip-tags.php