Merge branch '3.4' into 4.4

* 3.4:
  [Intl] promote warnings to value errors on PHP 8
  Fix CS
  DateTime validator support for trailing data

Author: xabbuh

Constraints/DateTimeValidator.php

@@ -59,6 +59,12 @@ public function validate($value, Constraint $constraint)
             return;
         }
 
+        if ('+' === substr($constraint->format, -1)) {
+            $errors['warnings'] = array_filter($errors['warnings'], function ($warning) {
+                return 'Trailing data' !== $warning;
+            });
+        }
+
         foreach ($errors['warnings'] as $warning) {
             if ('The parsed date was invalid' === $warning) {
                 $this->context->buildViolation($constraint->message)

Tests/Constraints/DateTimeValidatorTest.php

@@ -136,4 +136,12 @@ public function getInvalidDateTimes()
             ['Y-m-d H:i:s', '2010-01-01 00:00:60', DateTime::INVALID_TIME_ERROR],
         ];
     }
+
+    public function testDateTimeWithTrailingData()
+    {
+        $this->validator->validate('1995-05-10 00:00:00', new DateTime([
+            'format' => 'Y-m-d+',
+        ]));
+        $this->assertNoViolation();
+    }
 }