[Form] Fixed "label" option to accept the value "0"

Author: webmozart

src/Symfony/Component/Form/Extension/Core/Type/FieldType.php

@@ -52,7 +52,7 @@ public function buildForm(FormBuilder $builder, array $options)
             ->setAttribute('error_mapping', $options['error_mapping'])
             ->setAttribute('max_length', $options['max_length'])
             ->setAttribute('pattern', $options['pattern'])
-            ->setAttribute('label', $options['label'] ?: $this->humanize($builder->getName()))
+            ->setAttribute('label', strlen($options['label']) > 0 ? $options['label'] : $this->humanize($builder->getName()))
             ->setAttribute('attr', $options['attr'] ?: array())
             ->setAttribute('invalid_message', $options['invalid_message'])
             ->setAttribute('invalid_message_parameters', $options['invalid_message_parameters'])

tests/Symfony/Tests/Component/Form/Extension/Core/Type/FieldTypeTest.php

@@ -238,4 +238,12 @@ public function testAttributesException()
         $form = $this->factory->create('field', null, array('attr' => ''));
     }
 
+    // https://github.com/symfony/symfony/issues/6862
+    public function testPassZeroLabelToView()
+    {
+        $view = $this->factory->create('field', null, array('label' => 0))->createView();
+
+        $this->assertEquals('0', $view->get('label'));
+    }
+
 }