Question

I use this code to make plain texts hyperlinks.

 $text = eregi_replace('(((f|ht){1}tp://)[-a-zA-Z0-9@:%_\+.~#?&//=]+)', 
    '<a target="_blank" href="\\1">\\1</a>', $text); 
      $text = eregi_replace('(((f|ht){1}tps://)[-a-zA-Z0-9@:%_\+.~#?&//=]+)', 
    '<a target="_blank" href="\\1">\\1</a>', $text); 
  $text = eregi_replace('([[:space:]()[{}])(www.[-a-zA-Z0-9@:%_\+.~#?&//=]+)', 
    '\\1<a target="_blank" href="http://\\2">\\2</a>', $text); 
  $text = eregi_replace('([_\.0-9a-z-]+@([0-9a-z][0-9a-z-]+\.)+[a-z]{2,3})', 
    '<a target="_blank" href="mailto:\\1">\\1</a>', $text); 

But it doesnt work when text is http://www.domain.com or domain.com or subdomain.domain.com

How can i make it work with them ?

Thanks

Answer 1

There are heaps of duplicates of this question, which is the very fact that makes it more difficult to find the right one. Accept this list instead:

• How do I linkify urls in a string with php?
• regex to turn URLs into links without messing with existing links in the text
• PHP – Function To Find Links In Text
• Need a good regex to convert URLs to links but leave existing links alone

But since you already have something that you think works for you, there would be the option to just add the edge case. Finding sub.domain.com is not easy and likely leads to false positives. But converting them to http:// urls so the other rules pick them up would be possible by applying this first:

$text = preg_replace('#(?<!://)w+\.\w+\.(com|net|org|\w\w)\b\S*#', "http://$0", $text);
$text = preg_replace('#(?<!://)www\.\S+#', "http://$0", $text);

Instead of \S you could use your lengthy character class.