php Match and replace

Question

Hi, I want to replace every link I find within a string, with a modified version of the string, say for example:

The quick brown fox jumped over the http://www.google.com/?v=abc and http://www.google.com/?v=x_y-z
I would replace (and modify) the links in this so it becomes: http://www.google.com/v/abc and http://www.google.com/v/x_y-z

I know how to find all the links using preg_match_all($pattern, $text, $out, PREG_SET_ORDER); and I can manipulate the strings using preg_split etc - This is done one at a time.

The outcome I'm looking for is:

The quick brown fox jumped over the http://www.google.com/v/abc and http://www.google.com/v/=x_y-z
However how could I match and replace all of them? Any help would be greatly appreciated.

Answer 1

Use preg_replace for that:

$str = preg_replace('/\?v=([^ ]*)/', '/v/$1', $str);

This assumes that you want to match everything after ?v= and put it after the /v/. If that's not the case, you'll have to be more specific about what the pattern is.

Answer 2

using the g (global) and i (case insensitive) flags should extend the search to everything.

$string = preg_replace('/\?v=([^\s]+)/gi','/v/$1', $string);

This assumes that there is some type of whitespace after your url.