Replace URLs in text with HTML links

Question

Here is a design though: For example is I put a link such as

http://example.com

in textarea. How do I get PHP t

Answer 1

If you want to trust the IANA you can get your current list of offcially supported TLDs in use there like:

  $validTLDs = 
explode("\n", file_get_contents('http://data.iana.org/TLD/tlds-alpha-by-domain.txt')); //get the official list of valid tlds
  array_shift($validTLDs); //throw away first line containing meta data
  array_pop($validTLDs); //throw away last element which is empty

Makes Søren Løvborg's solution #2 a bit less verbose and spares you the hassle of updating the list, nowadays new tlds are thrown out so carelessly ;)