Making an active link in PHP -

i've created blog site php. there's section can make comment. wondering how make url active when post 1 in comment. i've noticed when make comment url in it, link not active or can't hover on it. there code make active?

you need convert part of string url link.

// regular expression filter $reg_exurl = "/(http|https|ftp|ftps)\:\/\/[a-za-z0-9\-\.]+\.[a-za-z]{2,3}(\/\s*)?/";  // text want filter urls $text = "the text want filter goes here. http://google.com";  // check if there url in text if(preg_match($reg_exurl, $text, $url))  {     // make urls hyper links     echo preg_replace($reg_exurl, "<a href="{$url[0]}">{$url[0]}</a> ", $text); } else {     // if no urls in text return text     echo $text; }