php7.4 mixed

lib/Db/ReaderEntity.php

@@ -24,7 +24,7 @@ abstract class ReaderEntity extends Entity {
 	 *
 	 * @return string|array
 	 */
-	public function conditional_json_decode(string $el): mixed {
+	public function conditional_json_decode(string $el) {
 		/** @var array $result */
 		$result = json_decode($el);
 		if (json_last_error() === JSON_ERROR_NONE) {

lib/Hooks.php

@@ -79,7 +79,10 @@ class Hooks {
 		$queryBuilder->executeStatement();
 	}
 
-	private static function isJson(mixed $string): bool {
+	/**
+	 * @param mixed $string
+	 */
+	private static function isJson($string): bool {
 		return is_string($string) && is_array(json_decode($string, true)) && json_last_error() == JSON_ERROR_NONE;
 	}
 }