Description:
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doc said https://www.php.net/manual/en/function.parse-url
> Partial URLs are also accepted, parse_url() tries its best to parse them correctly.

Like this "https://bugs.php.net///////report.php" is a valid URL. So I add "//" instead of "/" for relative url and function return wrong result.

This happen with wrong user input in browser address bar and using  parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);



Test script:
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// Working for absolute url
$url = 'http://username:password@hostname:9090//path?arg=value#anchor';
var_dump(parse_url($url, PHP_URL_PATH));
result: string(6) "//path"

Add: But it should return "/path" instead of "//path"?


// Failed for relative url
$url = '//path?arg=value#anchor';
var_dump(parse_url($url, PHP_URL_PATH));
result: NULL

Should be "//path" or better "/path" but not NULL.