Remove URL's

[The Little Guy]

What is the best way to remove all different formats of URL's?

 

Currently I remove all tags, so I am left with just one or more URL's How do I remove them as well?

[effigy]

all different formats of URL's?

 

What do you mean by formats--protocols (http, https, ftp)?

[The Little Guy]

http

https

ftp

www

 

so... if I have one or more of the following:

 

visit: https://google.com and WIN!

visit: https://www.google.com and WIN!

visit: http://google.com and WIN!

visit: http://www.google.com and WIN!

visit: www.google.com and WIN!

visit: ftp://www.google.com and WIN!

visit: ftp://google.com and WIN!

 

or any other common urls, it would then format it like this:

 

visit: [ URL REMOVED ] and WIN!

[dsaba]

$pat ='~(?<=visit: )(?:http://|https://|ftp://)*(?:www)?[^\s]+(?= and Win!)~i';
$source = preg_replace($pat, '[url REMOVED]', $source);

[dsaba]

*this is better to match just the url with any text

~(??(?<=http://|ftp://|https://)(?:http://|ftp://|https://)|)www\.|http://|https://|ftp://)[^\s]+~

 

Tested:

http://nancywalshee03.freehostia.com/regextester/regex_tester.php?seeSaved=ev0obz7e

[effigy]

%

### Protocol or start.

(?:

(??:https?|ftp)://)

|

www\.

)

### Body.

\S+

### Avoid punctuation.

(?<!\p{P})

%x

[dsaba]

Effigy your regex will match:

www.lalallookiamnotareallink

http://again (look even SMF thinks these are links)

 

All urls have at least 1 '.' in them so I'd say:

~(??:(?:https?|ftp)://)|www\.)(?:\S+\.\S+)(?<!\p{P})~

 

I also don't see why you are using the x modifier because \S will not match white space anyways.

 

I couldn't figure out the meaning of the P unicode grapheme, could you a provide a link to a listing of these, or just tell what it is?

[dsaba]

*

~(??:(?:https?|ftp)://)|www\.)\S+(?<!\p{P})\.\S+(?<!\p{P})~

[Daniel0]

@dsaba: All URLs does not need at least one dot. E.g. from within my LAN my computer will be accessible by the name daniel-laptop. That means that http://daniel-laptop will be a valid URL from within my LAN seeing as my computer is running an httpd on port 80.

[effigy]

I also don't see why you are using the x modifier because \S will not match white space anyways.

 

To separate and comment the different parts.

 

I couldn't figure out the meaning of the P unicode grapheme, could you a provide a link to a listing of these, or just tell what it is?

 

Unicode Character Properties.

[dsaba]

I've been to this page but it does not specify what punctuation marks it matches exactly, unicode supports many many languages, and in different languages punctuation means different things and there exists punctuation marks outside the realm of english punctuation marks.

[effigy]

There's a basic showing here.

 

And this will show you as much as you want:

 

<meta charset="utf-8"/>
<pre>
<?php
### Up the range as much as you want.
### Unicode 5.0.0 contains 1,114,112 characters.
foreach (range(0, 127) as $code_point) {
	$utf = code2utf($code_point);
	if (preg_match('/\p{P}/u', $utf)) {
		printf('[%09s]: ', number_format($code_point));
		echo $utf, '<br/>';
	}
}

### Borrowed from http://us3.php.net/manual/en/function.utf8-encode.php#58461
function code2utf($num) {
   if($num<128)return chr($num);
   if($num<2048)return chr(($num>>6)+192).chr(($num&63)+128);
   if($num<65536)return chr(($num>>12)+224).chr((($num>>6)&63)+128).chr(($num&63)+128);
   if($num<2097152)return chr(($num>>18)+240).chr((($num>>12)&63)+128).chr((($num>>6)&63)+128) .chr(($num&63)+128);
   return '';
}
?>
</pre>

 

For example:

 

[000000033]: !

[000000034]: "

[000000035]: #

[000000037]: %

[000000038]: &

[000000039]: '

[000000040]: (

[000000041]: )

[000000042]: *

[000000044]: ,

[000000045]: -

[000000046]: .

[000000047]: /

[000000058]: :

[000000059]: ;

[000000063]: ?

[000000064]: @

[000000091]: [

[000000092]: \

[000000093]: ]

[000000095]: _

[000000123]: {

[000000125]: }