[TASK] Fix phpstan checkFunctionArgumentTypes errors in ext:core Link…

…Handling

This patch fixes incompatible type usage in function arguments
and is preparatory work for introducing native type hints and
strict mode in all core files.

Releases: master, 10.4
Resolves: #92256
Change-Id: Iffa47071ef75ff1453d76864acef853240da81df
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/65825
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>

typo3/sysext/core/Classes/LinkHandling/LegacyLinkNotationConverter.php

@@ -71,7 +71,7 @@ public function resolve(string $linkParameter): array
         // Resolve FAL-api "file:UID-of-sys_file-record" and "file:combined-identifier"
         if (stripos($linkParameter, 'file:') === 0) {
             $result = $this->getFileOrFolderObjectFromMixedIdentifier(substr($linkParameter, 5));
-        } elseif (GeneralUtility::validEmail(parse_url($linkParameter, PHP_URL_PATH))) {
+        } elseif (GeneralUtility::validEmail((string)parse_url($linkParameter, PHP_URL_PATH))) {
             $result['type'] = LinkService::TYPE_EMAIL;
             $result['email'] = $linkParameter;
         } elseif (strpos($linkParameter, 'tel:') === 0) {