fix: restore compatibility with PHP 7.4, fix phpstan errors

Author: Art4

.docker/PHP-Dockerfile

@@ -1,4 +1,4 @@
-FROM php:8.3-fpm
+FROM php:7.4-fpm
 
 RUN apt-get update
 RUN apt-get --yes --no-install-recommends install \
@@ -32,7 +32,7 @@ RUN docker-php-ext-install -j$(nproc) \
 COPY build/php/opcache.ini /usr/local/etc/php/conf.d/
 COPY build/php/custom.ini /usr/local/etc/php/conf.d/
 
-RUN pecl install xdebug-3.4.0 && docker-php-ext-enable xdebug
+RUN pecl install xdebug-3.1.6 && docker-php-ext-enable xdebug
 
 RUN php --version
 

src/Redmine/Client/NativeCurlClient.php

@@ -324,7 +324,7 @@ private function runRequest(string $method, string $path, string $body = '', str
      *
      * BC for PHP 7.4: Do not add the return type because CurlHandle was introduced in PHP 8.0
      *
-     * @return \CurlHandle a cURL handle on success, <b>FALSE</b> on errors
+     * @return mixed a cURL handle on success, <b>FALSE</b> on errors
      */
     private function createCurl(string $method, string $path, string $body = '', string $contentType = '')
     {

tests/Behat/Bootstrap/FeatureContext.php

@@ -74,7 +74,10 @@ public static function clean(AfterSuiteScope $scope): void
 
     private Response $lastResponse;
 
-    private mixed $lastReturn;
+    /**
+     * @var mixed
+     */
+    private $lastReturn;
 
     /**
      * @var array<mixed>
@@ -112,7 +115,7 @@ private function getNativeCurlClient(): NativeCurlClient
         return $this->client;
     }
 
-    private function registerClientResponse(mixed $lastReturn, Response $lastResponse): void
+    private function registerClientResponse($lastReturn, Response $lastResponse): void
     {
         unset($this->lastReturnAsArray);
         $this->lastReturn = $lastReturn;
@@ -371,7 +374,7 @@ private function getLastReturnAsArray(): array
     /**
      * Get item from an array by key supporting "dot" notation.
      */
-    private function getItemFromArray(array $array, $key): mixed
+    private function getItemFromArray(array $array, $key)
     {
         if ($key === null) {
             return $array;

tests/RedmineExtension/RedmineInstance.php

@@ -226,6 +226,7 @@ private function saveMigratedDatabase(): void
     private function restoreFromMigratedDatabase(): void
     {
         $workingDB = new SQLite3($this->dataPath . $this->workingDB);
+        $workingDB->busyTimeout(1000);
 
         $migratedDB = new SQLite3($this->dataPath . $this->migratedDB);