$isurl($1-).prop
.prop would be http ftp gopher and any other types of URLs. Also -http would see if it's anything other than http.
$isurl(
http://www.mirc.com).-http would return false
$isurl(
http://www.mirc.com).-ftp would return true.
$isurl(http://www.mirc.com,-ftp) would NOT work. Cause some may have comas in the possible URL causing error.
$isurl(
http://www.mirc.com) would return $true
$isurl(
http://wwmirc).-ftp would return true since it's anything but a FTP working URL
