$_pageOfContent = qq~
Hello my name is so and so, and I really recommend this website because I think it has some really cool ideas, you can find it at the website located on http://www.mydom.com and also on this other one here http://www.yourdom.com.

Thank you much,
Me~;

$_pageOfContent = make_URL_href($_pageOfContent);
# Now $_pageOfContent will have this content:
#Hello my name is so and so, and I really recommend this #website because I think it has some really cool ideas, #you can find it at the website located on
#<a href="http://www.mydom.com">http://www.mydom.com</a> #and also on this other one here
#<a href="http://www.yourdom.com">http://www.yourdom.com</a>.
#
#Thank you much,
#Me
#?

sub make_URL_href($){
    my( $url ) = @_;
    if( $url !~
        s{^(http:[-\w/#~:.+=&%@!]+)(\?.*)$}{<a href="$1$2">$1</a>}i ){
        $url = "<a href=\"$url\">$url</a>";
    }
    return $url;
}