FIX Convert slashes in paths when getting list of classes for file/fo…

…lder

This is to support the mechanism working on all operating systems where Windows may produce a mix of forward and backward slashes in some paths.
For working with the files it may not be a problem, but for exact string comparison the path delimiters need to be unified.

src/Core/ClassInfo.php

@@ -301,14 +301,14 @@ public static function classImplements($className, $interfaceName)
      */
     public static function classes_for_file($filePath)
     {
-        $absFilePath = Director::getAbsFile($filePath);
+        $absFilePath = Convert::slashes(Director::getAbsFile($filePath));
         $classManifest = ClassLoader::inst()->getManifest();
         $classes = $classManifest->getClasses();
         $classNames = $classManifest->getClassNames();
 
         $matchedClasses = [];
         foreach ($classes as $lowerClass => $compareFilePath) {
-            if (strcasecmp($absFilePath ?? '', $compareFilePath ?? '') === 0) {
+            if (strcasecmp($absFilePath, Convert::slashes($compareFilePath ?? '')) === 0) {
                 $matchedClasses[$lowerClass] = $classNames[$lowerClass];
             }
         }
@@ -324,14 +324,14 @@ public static function classes_for_file($filePath)
      */
     public static function classes_for_folder($folderPath)
     {
-        $absFolderPath = Director::getAbsFile($folderPath);
+        $absFolderPath = Convert::slashes(Director::getAbsFile($folderPath));
         $classManifest = ClassLoader::inst()->getManifest();
         $classes = $classManifest->getClasses();
         $classNames = $classManifest->getClassNames();
 
         $matchedClasses = [];
         foreach ($classes as $lowerClass => $compareFilePath) {
-            if (stripos($compareFilePath ?? '', $absFolderPath ?? '') === 0) {
+            if (stripos(Convert::slashes($compareFilePath ?? ''), $absFolderPath) === 0) {
                 $matchedClasses[$lowerClass] = $classNames[$lowerClass];
             }
         }