preg_replace to remove all words beginning with http:// and ending with a space

Question

Hi,

i got an idea to remove all links from a string with PHP.

i need a preg_replace to remove and strip all words beginning with :

http:// or https:// or www. or www3. or ftp://

and ending with a white space.

example : hello http://dsqdsq.com/fdsfsd?fsdflsd enjoy !

it's will be : hello enjoy !

Thanks

Answer 1

$string = 'hello http://dsqdsq.com/fdsfsd?fsdflsd enjoy !';
$stripped_string = preg_replace('; ((ftp|https?)://|www3?\.).+? ;', ' ', $string);

Update: Here is with \b instead of spaces, which will work better. Big thanks to cletus!

$string = 'hello http://dsqdsq.com/fdsfsd?fsdflsd enjoy !';
$stripped_string = preg_replace(';\b((ftp|https?)://|www3?\.).+?\b;', ' ', $string);

Answer 2

something like this? just off the top of my head without checking

/(http:\/\/(.*?)\s)/i

Answer 3

I would do it this way:

$output = preg_replace('!\b((https?|ftp)://)?www3?\..*?\b!', '', $input);

which:

• Starts at a word boundary (\b);
• Optionally begins with http://, https:// or ftp://; and
• Has a domain name beginning with www. or www3.

That and all text up to the next word boundary is then deleted.

Note: Using \b is generally superior than checking for spaces. \b is a zero-width (meaning it consumes no part of the input) that matches the beginning of the string, the end of the string, the transition from a word to a non-word character or the transition from a non-word to a word character.

Answer 4

hmm.. try

$pattern=array(
        '`((?:https?|ftp)://\S+[[:alnum:]]/?)`si',
        '`((?<!//)(www\.\S+[[:alnum:]]/?))`si'
        );
$output = "http://$1";
$input = // set some url here;
preg_replace($pattern,$output,$input);