Reg. vyraz pre html adresu

$input = preg_replace("# http(s)?://([^, ]+) #"," <a href=\"http://$2\" target=\"_blank\">$2</a>", $input);
   $input = preg_replace("# www.([^, ]+) #"," <a href=\"http://$1\" target=\"_blank\">$1</a>", $input);

(http|https|ftp)\://([a-zA-Z0-9\.\-]+(\:[a-zA-Z0-9\.&%\$\-]+)*@)?((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|([a-zA-Z0-9\-]+\.)*[a-zA-Z0-9\-]+\.[a-zA-Z]{2,4})(\:[0-9]+)?(/[^/][a-zA-Z0-9\.\,\?\'\\/\+&%\$#\=~_\-@]*)*

$pattern = "/(http|https|ftp)\://([a-zA-Z0-9\.\-]+(\:[a-zA-Z0-9\.&%\$\-]+)*@)?((25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])|([a-zA-Z0-9\-]+\.)*[a-zA-Z0-9\-]+\.[a-zA-Z]{2,4})(\:[0-9]+)?(/[^/][a-zA-Z0-9\.\,\?\'\\/\+&%\$#\=~_\-@]*)*)";
$replace = "<a href='$0'>$0</a>";
$text = "bla bla bla odkaz bla bla bla";
$replaced = preg_replace($pattern, $replace, $text);

$input = preg_replace("#\shttp(s)?://([^,\s]+)\s#"," <a href=\"http://$2\" target=\"_blank\">$2</a> ", $input);
$input = preg_replace("#\swww.([^,\s]+)\s#"," <a href=\"http://$1\" target=\"_blank\">$1</a> ", $input);

bla bla www.nieco.sk

nieco

function make_clickable($text)
{
   $text = preg_replace('#(script|about|applet|activex|chrome):#is', "\\1:", $text);

   // pad it with a space so we can match things at the start of the 1st line.
   $ret = ' ' . $text;

   // matches an "xxxx://yyyy" URL at the start of a line, or after a space.
   // xxxx can only be alpha characters.
   // yyyy is anything up to the first space, newline, comma, double quote or <
   $ret = preg_replace("#(^|[\n ])([\w]+?://[\w\#$%&~/.\-;:=,?@\[\]+]*)#is", "\\1<a href=\"\\2\" target=\"_blank\">\\2</a>", $ret);

   // matches a "www|ftp.xxxx.yyyy[/zzzz]" kinda lazy URL thing
   // Must contain at least 2 dots. xxxx contains either alphanum, or "-"
   // zzzz is optional.. will contain everything up to the first space, newline,
   // comma, double quote or <.
   $ret = preg_replace("#(^|[\n ])((www|ftp)\.[\w\#$%&~/.\-;:=,?@\[\]+]*)#is", "\\1<a href=\"http://\\2\" target=\"_blank\">\\2</a>", $ret);

   // matches an email@domain type address at the start of a line, or after a space.
   // Note: Only the followed chars are valid; alphanums, "-", "_" and or ".".
   $ret = preg_replace("#(^|[\n ])([a-z0-9&\-_.]+?)@([\w\-]+\.([\w\-\.]+\.)*[\w]+)#i", "\\1<a href=\"mailto:\\2@\\3\">\\2@\\3</a>", $ret);

   // Remove our padding..
   $ret = substr($ret, 1);

   return($ret);
}