5177 use dump() instead of print in examples

Author: Henry Snoek

components/class_loader/class_map_generator.rst

@@ -50,7 +50,7 @@ method::
 
     use Symfony\Component\ClassLoader\ClassMapGenerator;
 
-    print_r(ClassMapGenerator::createMap(__DIR__.'/library'));
+    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');
+    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 $domElement->nodeName;
+        dump($domElement->nodeName);
     }
 
 Specialized :class:`Symfony\\Component\\DomCrawler\\Link` and

components/finder.rst

@@ -30,14 +30,14 @@ directories::
     $finder->files()->in(__DIR__);
 
     foreach ($finder as $file) {
-        // Print the absolute path
-        print $file->getRealpath()."\n";
+        // Dump the absolute path
+        dump($file->getRealpath());
 
-        // Print the relative path to the file, omitting the filename
-        print $file->getRelativePath()."\n";
+        // Dump the relative path to the file, omitting the filename
+        dump($file->getRelativePath());
 
-        // Print the relative path to the file
-        print $file->getRelativePathname()."\n";
+        // Dump the relative path to the file
+        dump($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::