URI.php error when passing parameter with : (colon)

[eluser]zivel[/eluser]
I have the same behavior. Is this a PHP Bug?
Because after some investigation I found out:

Code:

WORKS:
/object/:LOR:1
/object/LOR::1
/object/LOR:1:
/object/LOR:
/object/LO:RA3

and

Code:

DOES NOT WORK
/object/LOR:1
/object/LOR2:3
/object/LORA:3

any idea?
(here my testcode)

Code:

$url= array(
    "/object/:LOR:1"
    ,"/object/LOR::1"
    ,"/object/LOR:1:"
    ,"/object/LOR:"
    ,"/object/LO:RA3"
    ,"/object/LOR:1"
    ,"/object/LORA:3"
    ,"/object/LOR2:3");
foreach( $url as $v ){
  echo $v ." is: ";
  var_dump( parse_url( $v, PHP_URL_PATH ) );
}