minor #12372 [Yaml] don't override internal PHP constants (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
----------

[Yaml] don't override internal PHP constants

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #11783
| License       | MIT
| Doc PR        |

Commits
-------

376cc03 don't override internal PHP constants

src/Symfony/Bridge/Twig/Extension/CodeExtension.php

@@ -11,10 +11,6 @@
 
 namespace Symfony\Bridge\Twig\Extension;
 
-if (!defined('ENT_SUBSTITUTE')) {
-    define('ENT_SUBSTITUTE', 8);
-}
-
 /**
  * Twig extension relate to PHP code and used by the profiler and the default exception templates.
  *
@@ -176,7 +172,13 @@ class CodeExtension extends \Twig_Extension
         $text = "$text at line $line";
 
         if (false !== $link = $this->getFileLink($file, $line)) {
-            return sprintf('<a href="%s" title="Click to open this file" class="file_link">%s</a>', htmlspecialchars($link, ENT_QUOTES | ENT_SUBSTITUTE, $this->charset), $text);
+            if (version_compare(PHP_VERSION, '5.4.0', '>=')) {
+                $flags = ENT_QUOTES | ENT_SUBSTITUTE;
+            } else {
+                $flags = ENT_QUOTES;
+            }
+
+            return sprintf('<a href="%s" title="Click to open this file" class="file_link">%s</a>', htmlspecialchars($link, $flags, $this->charset), $text);
         }
 
         return $text;

src/Symfony/Bundle/FrameworkBundle/Templating/Helper/CodeHelper.php

@@ -13,10 +13,6 @@ namespace Symfony\Bundle\FrameworkBundle\Templating\Helper;
 
 use Symfony\Component\Templating\Helper\Helper;
 
-if (!defined('ENT_SUBSTITUTE')) {
-    define('ENT_SUBSTITUTE', 8);
-}
-
 /**
  * CodeHelper.
  *
@@ -170,7 +166,13 @@ class CodeHelper extends Helper
         }
 
         if (false !== $link = $this->getFileLink($file, $line)) {
-            return sprintf('<a href="%s" title="Click to open this file" class="file_link">%s</a>', htmlspecialchars($link, ENT_QUOTES | ENT_SUBSTITUTE, $this->charset), $text);
+            if (version_compare(PHP_VERSION, '5.4.0', '>=')) {
+                $flags = ENT_QUOTES | ENT_SUBSTITUTE;
+            } else {
+                $flags = ENT_QUOTES;
+            }
+
+            return sprintf('<a href="%s" title="Click to open this file" class="file_link">%s</a>', htmlspecialchars($link, $flags, $this->charset), $text);
         }
 
         return $text;

src/Symfony/Component/ClassLoader/ClassMapGenerator.php

@@ -11,8 +11,10 @@
 
 namespace Symfony\Component\ClassLoader;
 
-if (!defined('T_TRAIT')) {
+if (version_compare(PHP_VERSION, '5.4.0', '>=')) {
-    define('T_TRAIT', 0);
+    define('SYMFONY_TRAIT', T_TRAIT);
+} else {
+    define('SYMFONY_TRAIT', 0);
 }
 
 /**
@@ -113,7 +115,7 @@ class ClassMapGenerator
                     break;
                 case T_CLASS:
                 case T_INTERFACE:
-                case T_TRAIT:
+                case SYMFONY_TRAIT:
                     // Find the classname
                     while (($t = $tokens[++$i]) && is_array($t)) {
                         if (T_STRING === $t[0]) {

src/Symfony/Component/Console/Input/InputDefinition.php

@@ -11,11 +11,6 @@
 
 namespace Symfony\Component\Console\Input;
 
-if (!defined('JSON_UNESCAPED_UNICODE')) {
-    define('JSON_UNESCAPED_SLASHES', 64);
-    define('JSON_UNESCAPED_UNICODE', 256);
-}
-
 use Symfony\Component\Console\Descriptor\TextDescriptor;
 use Symfony\Component\Console\Descriptor\XmlDescriptor;
 

src/Symfony/Component/Debug/ExceptionHandler.php

@@ -14,10 +14,6 @@ namespace Symfony\Component\Debug;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Debug\Exception\FlattenException;
 
-if (!defined('ENT_SUBSTITUTE')) {
-    define('ENT_SUBSTITUTE', 8);
-}
-
 /**
  * ExceptionHandler converts an exception to a Response object.
  *
@@ -292,6 +288,11 @@ EOF;
      */
     private function formatArgs(array $args)
     {
+        if (version_compare(PHP_VERSION, '5.4.0', '>=')) {
+            $flags = ENT_QUOTES | ENT_SUBSTITUTE;
+        } else {
+            $flags = ENT_QUOTES;
+        }
         $result = array();
         foreach ($args as $key => $item) {
             if ('object' === $item[0]) {
@@ -299,7 +300,7 @@ EOF;
             } elseif ('array' === $item[0]) {
                 $formattedValue = sprintf("<em>array</em>(%s)", is_array($item[1]) ? $this->formatArgs($item[1]) : $item[1]);
             } elseif ('string' === $item[0]) {
-                $formattedValue = sprintf("'%s'", htmlspecialchars($item[1], ENT_QUOTES | ENT_SUBSTITUTE, $this->charset));
+                $formattedValue = sprintf("'%s'", htmlspecialchars($item[1], $flags, $this->charset));
             } elseif ('null' === $item[0]) {
                 $formattedValue = '<em>null</em>';
             } elseif ('boolean' === $item[0]) {
@@ -307,7 +308,7 @@ EOF;
             } elseif ('resource' === $item[0]) {
                 $formattedValue = '<em>resource</em>';
             } else {
-                $formattedValue = str_replace("\n", '', var_export(htmlspecialchars((string) $item[1], ENT_QUOTES | ENT_SUBSTITUTE, $this->charset), true));
+                $formattedValue = str_replace("\n", '', var_export(htmlspecialchars((string) $item[1], $flags, $this->charset), true));
             }
 
             $result[] = is_int($key) ? $formattedValue : sprintf("'%s' => %s", $key, $formattedValue);

src/Symfony/Component/HttpKernel/Fragment/HIncludeFragmentRenderer.php

@@ -11,10 +11,6 @@
 
 namespace Symfony\Component\HttpKernel\Fragment;
 
-if (!defined('ENT_SUBSTITUTE')) {
-    define('ENT_SUBSTITUTE', 8);
-}
-
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Templating\EngineInterface;
@@ -111,11 +107,16 @@ class HIncludeFragmentRenderer extends RoutableFragmentRenderer
         }
         $renderedAttributes = '';
         if (count($attributes) > 0) {
+            if (version_compare(PHP_VERSION, '5.4.0', '>=')) {
+                $flags = ENT_QUOTES | ENT_SUBSTITUTE;
+            } else {
+                $flags = ENT_QUOTES;
+            }
             foreach ($attributes as $attribute => $value) {
                 $renderedAttributes .= sprintf(
                     ' %s="%s"',
-                    htmlspecialchars($attribute, ENT_QUOTES | ENT_SUBSTITUTE, $this->charset, false),
+                    htmlspecialchars($attribute, $flags, $this->charset, false),
-                    htmlspecialchars($value, ENT_QUOTES | ENT_SUBSTITUTE, $this->charset, false)
+                    htmlspecialchars($value, $flags, $this->charset, false)
                 );
             }
         }

src/Symfony/Component/Templating/PhpEngine.php

@@ -17,10 +17,6 @@ use Symfony\Component\Templating\Storage\StringStorage;
 use Symfony\Component\Templating\Helper\HelperInterface;
 use Symfony\Component\Templating\Loader\LoaderInterface;
 
-if (!defined('ENT_SUBSTITUTE')) {
-    define('ENT_SUBSTITUTE', 8);
-}
-
 /**
  * PhpEngine is an engine able to render PHP templates.
  *
@@ -466,6 +462,11 @@ class PhpEngine implements EngineInterface, \ArrayAccess
     protected function initializeEscapers()
     {
         $that = $this;
+        if (version_compare(PHP_VERSION, '5.4.0', '>=')) {
+            $flags = ENT_QUOTES | ENT_SUBSTITUTE;
+        } else {
+            $flags = ENT_QUOTES;
+        }
 
         $this->escapers = array(
             'html' =>
@@ -476,10 +477,10 @@ class PhpEngine implements EngineInterface, \ArrayAccess
                  *
                  * @return string the escaped value
                  */
-                function ($value) use ($that) {
+                function ($value) use ($that, $flags) {
                     // Numbers and Boolean values get turned into strings which can cause problems
                     // with type comparisons (e.g. === or is_int() etc).
-                    return is_string($value) ? htmlspecialchars($value, ENT_QUOTES | ENT_SUBSTITUTE, $that->getCharset(), false) : $value;
+                    return is_string($value) ? htmlspecialchars($value, $flags, $that->getCharset(), false) : $value;
                 },
 
             'js' =>

src/Symfony/Component/Yaml/Exception/ParseException.php

@@ -11,11 +11,6 @@
 
 namespace Symfony\Component\Yaml\Exception;
 
-if (!defined('JSON_UNESCAPED_UNICODE')) {
-    define('JSON_UNESCAPED_SLASHES', 64);
-    define('JSON_UNESCAPED_UNICODE', 256);
-}
-
 /**
  * Exception class thrown when an error occurs during parsing.
  *
@@ -130,7 +125,12 @@ class ParseException extends RuntimeException
         }
 
         if (null !== $this->parsedFile) {
-            $this->message .= sprintf(' in %s', json_encode($this->parsedFile, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE));
+            if (version_compare(PHP_VERSION, '5.4.0', '>=')) {
+                $jsonOptions = JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE;
+            } else {
+                $jsonOptions = 0;
+            }
+            $this->message .= sprintf(' in %s', json_encode($this->parsedFile, $jsonOptions));
         }
 
         if ($this->parsedLine >= 0) {

src/Symfony/Component/Yaml/Tests/ParseExceptionTest.php

@@ -27,4 +27,16 @@ class ParseExceptionTest extends \PHPUnit_Framework_TestCase
 
         $this->assertEquals($message, $exception->getMessage());
     }
+
+    public function testGetMessageWithUnicodeInFilename()
+    {
+        $exception = new ParseException('Error message', 42, 'foo: bar', 'äöü.yml');
+        if (version_compare(PHP_VERSION, '5.4.0', '>=')) {
+            $message = 'Error message in "äöü.yml" at line 42 (near "foo: bar")';
+        } else {
+            $message = 'Error message in "\u00e4\u00f6\u00fc.yml" at line 42 (near "foo: bar")';
+        }
+
+        $this->assertEquals($message, $exception->getMessage());
+    }
 }