Description:
------------
parse_url() may return FALSE if the url cannot be parsed but doesn't indicate why it failed.

parse_url() internally calls php_url_parse_ex() which, from a quick look, has currently two cases it returns NULL (and thus parse_url() returns FALSE):

1) http://cvs.php.net/co.php/php-src/ext/standard/url.c?r=1.88#257
if (e-p > 5) { /* port cannot be longer then 5 characters */
[...]
return NULL

2) http://cvs.php.net/co.php/php-src/ext/standard/url.c?r=1.88#274
/* check if we have a valid host, if we don't reject the string as url */
[...]
return NULL;

An error code or string should be available for functions calling php_url_parse_ex() so a message to the user can be forwarded why it failed.


ps: the captcha is really really very unfriendly. This is my fifth try because all the time some of the character aren't even completely visible [cropped off] :-[