minor #5451 [#5388] change echo and print in examples (snoek09)

This PR was merged into the 2.3 branch.

Discussion
----------

[#5388] change echo and print in examples

This is a split of #5388 for the 2.3 branch.

Original description:

 > | Q             | A
 > | ------------- | ---
 > | Doc fix?      | yes
 > | New docs?     | no
 > | Applies to    | all
 > | Fixed tickets | #5177
 >
 > Original PR and discussion in #5285
 >
 > Change echo/print in examples to use:
 >
 > - `var_dump()` in components docs
 > - `dump()` in framework docs

Commits
-------

37db975 5177 use var_dump() in components
9fa1c11 5177 use var_dump() in components
c2acbee 5177 add die() after dump()
78c9b7c 5177 use dump() instead of print in examples
10898c9 5177 use dump() instead of echo in examples

Author: wouterj

book/doctrine.rst

@@ -1204,7 +1204,8 @@ to the given ``Category`` object via their ``category_id`` value.
         $category = $product->getCategory();
 
         // prints "Proxies\AppBundleEntityCategoryProxy"
-        echo get_class($category);
+        dump(get_class($category));
+        die();
 
     This proxy object extends the true ``Category`` object, and looks and
     acts exactly like it. The difference is that, by using a proxy object,

book/translation.rst

@@ -12,11 +12,13 @@ wrapping each with a function capable of translating the text (or "message")
 into the language of the user::
 
     // text will *always* print out in English
-    echo 'Hello World';
+    dump('Hello World');
+    die();
 
     // text can be translated into the end-user's language or
     // default to English
-    echo $translator->trans('Hello World');
+    dump($translator->trans('Hello World'));
+    die();
 
 .. note::
 

components/class_loader/class_map_generator.rst

@@ -50,7 +50,7 @@ method::
 
     use Symfony\Component\ClassLoader\ClassMapGenerator;
 
-    print_r(ClassMapGenerator::createMap(__DIR__.'/library'));
+    var_dump(ClassMapGenerator::createMap(__DIR__.'/library'));
 
 Given the files and class from the table above, you should see an output like
 this:

components/css_selector.rst

@@ -51,7 +51,7 @@ equivalents::
 
     use Symfony\Component\CssSelector\CssSelector;
 
-    print CssSelector::toXPath('div.item > h4 > a');
+    var_dump(CssSelector::toXPath('div.item > h4 > a'));
 
 This gives the following output:
 

components/dom_crawler.rst

@@ -47,7 +47,7 @@ traverse easily::
     $crawler = new Crawler($html);
 
     foreach ($crawler as $domElement) {
-        print $domElement->nodeName;
+        var_dump($domElement->nodeName);
     }
 
 Specialized :class:`Symfony\\Component\\DomCrawler\\Link` and

components/event_dispatcher/generic_event.rst

@@ -75,7 +75,7 @@ the event arguments::
     );
     $dispatcher->dispatch('foo', $event);
 
-    echo $event['counter'];
+    var_dump($event['counter']);
 
     class FooListener
     {
@@ -96,7 +96,7 @@ Filtering data::
     $event = new GenericEvent($subject, array('data' => 'Foo'));
     $dispatcher->dispatch('foo', $event);
 
-    echo $event['data'];
+    var_dump($event['data']);
 
     class FooListener
     {
@@ -105,3 +105,4 @@ Filtering data::
             $event['data'] = strtolower($event['data']);
         }
     }
+

components/event_dispatcher/introduction.rst

@@ -635,7 +635,7 @@ part of the listener's processing logic::
     {
         public function myEventListener(Event $event)
         {
-            echo $event->getName();
+            // ... do something with the event name
         }
     }
 

components/finder.rst

@@ -30,14 +30,14 @@ directories::
     $finder->files()->in(__DIR__);
 
     foreach ($finder as $file) {
-        // Print the absolute path
-        print $file->getRealpath()."\n";
+        // Dump the absolute path
+        var_dump($file->getRealpath());
 
-        // Print the relative path to the file, omitting the filename
-        print $file->getRelativePath()."\n";
+        // Dump the relative path to the file, omitting the filename
+        var_dump($file->getRelativePath());
 
-        // Print the relative path to the file
-        print $file->getRelativePathname()."\n";
+        // Dump the relative path to the file
+        var_dump($file->getRelativePathname());
     }
 
 The ``$file`` is an instance of :class:`Symfony\\Component\\Finder\\SplFileInfo`
@@ -121,9 +121,7 @@ And it also works with user-defined streams::
     $finder = new Finder();
     $finder->name('photos*')->size('< 100K')->date('since 1 hour ago');
     foreach ($finder->in('s3://bucket-name') as $file) {
-        // ... do something
-
-        print $file->getFilename()."\n";
+        // ... do something with the file
     }
 
 .. note::

components/form/introduction.rst

@@ -396,9 +396,9 @@ is created from the form factory.
             ->add('dueDate', 'date')
             ->getForm();
 
-        echo $twig->render('new.html.twig', array(
+        var_dump($twig->render('new.html.twig', array(
             'form' => $form->createView(),
-        ));
+        )));
 
     .. code-block:: php-symfony
 

components/http_foundation/introduction.rst

@@ -415,10 +415,10 @@ represented by a PHP callable instead of a string::
 
     $response = new StreamedResponse();
     $response->setCallback(function () {
-        echo 'Hello World';
+        var_dump('Hello World');
         flush();
         sleep(2);
-        echo 'Hello World';
+        var_dump('Hello World');
         flush();
     });
     $response->send();