DependencyChecker: fixed compatibility with PHP 8 [Closes #247]

Author: dg

src/DI/DependencyChecker.php

@@ -132,14 +132,15 @@ class_uses($name),
 }
 foreach ($class->getMethods(ReflectionMethod::IS_PUBLIC) as $method) {
 if ($method->getDeclaringClass() == $class) { // intentionally ==
+$type = $method->getReturnType();
 $hash[] = [
 $name,
 $method->name,
 $method->getDocComment(),
 self::hashParameters($method),
-$method->hasReturnType()
-? [$method->getReturnType()->getName(), $method->getReturnType()->allowsNull()]
-: null,
+PHP_VERSION_ID < 80000
+? ($type ? [$type->getName(), $type->allowsNull()] : null)
+: (string) $type,
 ];
 }
 }
@@ -158,14 +159,15 @@ class_uses($name),
 $method = new \ReflectionFunction($name);
 $uses = null;
 }
+$type = $method->getReturnType();
 $hash[] = [
 $name,
 $uses,
 $method->getDocComment(),
 self::hashParameters($method),
-$method->hasReturnType()
-? [$method->getReturnType()->getName(), $method->getReturnType()->allowsNull()]
-: null,
+PHP_VERSION_ID < 80000
+? ($type ? [$type->getName(), $type->allowsNull()] : null)
+: (string) $type,
 ];
 }
 
@@ -179,8 +181,9 @@ private static function hashParameters(\ReflectionFunctionAbstract $method): arr
 foreach ($method->getParameters() as $param) {
 $res[] = [
 $param->name,
-Reflection::getParameterType($param),
-$param->allowsNull(),
+PHP_VERSION_ID < 80000
+? [Reflection::getParameterType($param), $param->allowsNull()]
+: (string) $param->getType(),
 $param->isVariadic(),
 $param->isDefaultValueAvailable()
 ? [Reflection::getParameterDefaultValue($param)]