diff --git a/framework/base/Formatter.php b/framework/base/Formatter.php
index 836b8f04a3..78fdac8cc4 100644
--- a/framework/base/Formatter.php
+++ b/framework/base/Formatter.php
@@ -121,7 +121,7 @@ class Formatter extends Component
 			$params = [$value];
 		}
 		$method = 'as' . $format;
-		if (method_exists($this, $method)) {
+		if ($this->hasMethod($method)) {
 			return call_user_func_array([$this, $method], $params);
 		} else {
 			throw new InvalidParamException("Unknown type: $format");
diff --git a/framework/db/ActiveRelationTrait.php b/framework/db/ActiveRelationTrait.php
index 91df098959..ab06c1646e 100644
--- a/framework/db/ActiveRelationTrait.php
+++ b/framework/db/ActiveRelationTrait.php
@@ -136,13 +136,13 @@ trait ActiveRelationTrait
 	 * Finds the related records for the specified primary record.
 	 * This method is invoked when a relation of an ActiveRecord is being accessed in a lazy fashion.
 	 * @param string $name the relation name
-	 * @param ActiveRecordInterface $model the primary model
+	 * @param ActiveRecordInterface|BaseActiveRecord $model the primary model
 	 * @return mixed the related record(s)
 	 * @throws InvalidParamException if the relation is invalid
 	 */
 	public function findFor($name, $model)
 	{
-		if (method_exists($model, 'get' . $name)) {
+		if ($model->hasMethod('get' . $name)) {
 			$method = new \ReflectionMethod($model, 'get' . $name);
 			$realName = lcfirst(substr($method->getName(), 3));
 			if ($realName !== $name) {
diff --git a/framework/validators/Validator.php b/framework/validators/Validator.php
index 764de66ac7..fac370650b 100644
--- a/framework/validators/Validator.php
+++ b/framework/validators/Validator.php
@@ -136,7 +136,7 @@ class Validator extends Component
 	{
 		$params['attributes'] = $attributes;
 
-		if ($type instanceof \Closure || method_exists($object, $type)) {
+		if ($type instanceof \Closure || $object->hasMethod($type)) {
 			// method-based validator
 			$params['class'] = __NAMESPACE__ . '\InlineValidator';
 			$params['method'] = $type;