bug #54759 [Filesystem] better distinguish URL schemes and Windows drive letters (xabbuh)

This PR was merged into the 5.4 branch.

Discussion
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[Filesystem] better distinguish URL schemes and Windows drive letters

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Issues        | Fix #45485
| License       | MIT

Commits
-------

f456e75ec8 better distinguish URL schemes and windows drive letters

Author: fabpot

Path.php

@@ -368,7 +368,7 @@ public static function isAbsolute(string $path): bool
         }
 
         // Strip scheme
-        if (false !== $schemeSeparatorPosition = strpos($path, '://')) {
+        if (false !== ($schemeSeparatorPosition = strpos($path, '://')) && 1 !== $schemeSeparatorPosition) {
             $path = substr($path, $schemeSeparatorPosition + 3);
         }
 

Tests/PathTest.php

@@ -375,6 +375,8 @@ public static function provideIsAbsolutePathTests(): \Generator
 
         yield ['C:/css/style.css', true];
         yield ['D:/', true];
+        yield ['C:///windows', true];
+        yield ['C://test', true];
 
         yield ['E:\\css\\style.css', true];
         yield ['F:\\', true];