FormTypePlaceholder: fix issue with non array attr (function call) (#102)

* fix issue #101

* add issue_101 test

* fix function signature

Author: Christophe

src/Visitor/Php/Symfony/FormTypePlaceholder.php

@@ -49,7 +49,7 @@ public function enterNode(Node $node)
                 }
             } elseif ('placeholder' === $item->key->value) {
                 $placeholderNode = $item;
-            } elseif ('attr' === $item->key->value) {
+            } elseif ('attr' === $item->key->value && $item->value instanceof Node\Expr\Array_) {
                 foreach ($item->value->items as $attrValue) {
                     if ('placeholder' === $attrValue->key->value) {
                         $placeholderNode = $attrValue;

tests/Resources/Github/Issue_101.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Translation\Extractor\Tests\Resources\Php\Symfony;
+
+class NotAnArrayAttrType
+{
+    public function buildForm(FormBuilderInterface $builder, array $options)
+    {
+        $builder
+          ->add('field_with_function_as_attr_value', 'text', array(
+            'attr' => $this->getAttrFunction()
+          ));
+    }
+
+    public function getAttrFunction()
+    {
+        return array('maxlength' => 10);
+    }
+}