diff --git a/src/Symfony/Component/ClassLoader/ClassCollectionLoader.php b/src/Symfony/Component/ClassLoader/ClassCollectionLoader.php
index b2be33ad88ec1..406019b56554d 100644
--- a/src/Symfony/Component/ClassLoader/ClassCollectionLoader.php
+++ b/src/Symfony/Component/ClassLoader/ClassCollectionLoader.php
@@ -10,6 +10,7 @@
  */
 
 namespace Symfony\Component\ClassLoader;
+use Symfony\Component\Filesystem\Filesystem;
 
 /**
  * ClassCollectionLoader.
@@ -229,7 +230,8 @@ private static function compressCode($code)
      */
     private static function writeCacheFile($file, $content)
     {
-        $tmpFile = tempnam(dirname($file), basename($file));
+        $tmpFile = Filesystem::tempnam2(dirname($file), basename($file));
+
         if (false !== @file_put_contents($tmpFile, $content) && @rename($tmpFile, $file)) {
             @chmod($file, 0666 & ~umask());
 
diff --git a/src/Symfony/Component/ClassLoader/composer.json b/src/Symfony/Component/ClassLoader/composer.json
index 84ce6a0a633a7..6594457be4c3a 100644
--- a/src/Symfony/Component/ClassLoader/composer.json
+++ b/src/Symfony/Component/ClassLoader/composer.json
@@ -20,7 +20,8 @@
         "php": ">=5.3.3"
     },
     "require-dev": {
-        "symfony/finder": "~2.0"
+        "symfony/finder": "~2.0",
+        "symfony/filesystem": "~2.4"
     },
     "autoload": {
         "psr-0": { "Symfony\\Component\\ClassLoader\\": "" }
diff --git a/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php b/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php
index f9a1c2a2eb0dc..d2ec841a94270 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php
@@ -21,6 +21,7 @@
 use Symfony\Component\DependencyInjection\SimpleXMLElement;
 use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\Filesystem\Filesystem;
 
 /**
  * XmlFileLoader loads XML files service definitions.
@@ -309,7 +310,7 @@ public function validateSchema(\DOMDocument $dom)
         foreach ($schemaLocations as $namespace => $location) {
             $parts = explode('/', $location);
             if (0 === stripos($location, 'phar://')) {
-                $tmpfile = tempnam(sys_get_temp_dir(), 'sf2');
+                $tmpfile = Filesystem::tempnam2(sys_get_temp_dir(), 'sf2');
                 if ($tmpfile) {
                     copy($location, $tmpfile);
                     $tmpfiles[] = $tmpfile;
diff --git a/src/Symfony/Component/DependencyInjection/composer.json b/src/Symfony/Component/DependencyInjection/composer.json
index 2190101fa2c9f..73caaecff48b2 100644
--- a/src/Symfony/Component/DependencyInjection/composer.json
+++ b/src/Symfony/Component/DependencyInjection/composer.json
@@ -16,7 +16,8 @@
         }
     ],
     "require": {
-        "php": ">=5.3.3"
+        "php": ">=5.3.3",
+        "symfony/filesystem": "~2.4"
     },
     "require-dev": {
         "symfony/yaml": "~2.0",
diff --git a/src/Symfony/Component/Filesystem/Filesystem.php b/src/Symfony/Component/Filesystem/Filesystem.php
index 3b1c9bde65a92..adaa577934e46 100644
--- a/src/Symfony/Component/Filesystem/Filesystem.php
+++ b/src/Symfony/Component/Filesystem/Filesystem.php
@@ -448,7 +448,7 @@ public function dumpFile($filename, $content, $mode = 0666)
             throw new IOException(sprintf('Unable to write to the "%s" directory.', $dir), 0, null, $dir);
         }
 
-        $tmpFile = tempnam($dir, basename($filename));
+        $tmpFile = self::tempnam2($dir, basename($filename));
 
         if (false === @file_put_contents($tmpFile, $content)) {
             throw new IOException(sprintf('Failed to write file "%s".', $filename), 0, null, $filename);
@@ -471,4 +471,37 @@ private function toIterator($files)
 
         return $files;
     }
+
+    /** adapted from: http://www.deltascripts.com/board/viewtopic.php?id=7843 */
+    public static function tempnam2($dir, $prefix, $postfix='')
+    {
+        if (!getenv('DISABLE_FUNCTIONS')) {
+            return tempnam($dir, $prefix);
+        }
+
+        if ($dir[strlen($dir) - 1] == '/') {
+            $trailing_slash = "";
+        } else {
+            $trailing_slash = "/";
+        }
+
+        /* The PHP function is_dir returns true on files that have no extension.
+        The file type function will tell you correctly what the file is */
+        if (!is_dir(realpath($dir)) || filetype(realpath($dir)) != "dir") {
+            // The specified dir is not actually a dir
+            return false;
+        }
+        if (!is_writable($dir)) {
+            // The directory will not let us create a file there
+            return false;
+        }
+
+        do {
+            $seed = substr(md5(microtime().posix_getpid()), 0, 8);
+            $filename = $dir.$trailing_slash.$prefix.$seed.$postfix;
+        } while (file_exists($filename));
+        touch($filename);
+
+        return $filename;
+    }
 }
diff --git a/src/Symfony/Component/HttpKernel/CacheWarmer/CacheWarmer.php b/src/Symfony/Component/HttpKernel/CacheWarmer/CacheWarmer.php
index 948b3ffd141c1..5efa1959c681c 100644
--- a/src/Symfony/Component/HttpKernel/CacheWarmer/CacheWarmer.php
+++ b/src/Symfony/Component/HttpKernel/CacheWarmer/CacheWarmer.php
@@ -10,6 +10,7 @@
  */
 
 namespace Symfony\Component\HttpKernel\CacheWarmer;
+use Symfony\Component\Filesystem\Filesystem;
 
 /**
  * Abstract cache warmer that knows how to write a file to the cache.
@@ -20,7 +21,7 @@ abstract class CacheWarmer implements CacheWarmerInterface
 {
     protected function writeCacheFile($file, $content)
     {
-        $tmpFile = tempnam(dirname($file), basename($file));
+        $tmpFile = Filesystem::tempnam2(dirname($file), basename($file));
         if (false !== @file_put_contents($tmpFile, $content) && @rename($tmpFile, $file)) {
             @chmod($file, 0666 & ~umask());
 
diff --git a/src/Symfony/Component/HttpKernel/HttpCache/Store.php b/src/Symfony/Component/HttpKernel/HttpCache/Store.php
index 1d55ab4118f2a..0a2c50d8e5e19 100644
--- a/src/Symfony/Component/HttpKernel/HttpCache/Store.php
+++ b/src/Symfony/Component/HttpKernel/HttpCache/Store.php
@@ -14,6 +14,7 @@
 
 namespace Symfony\Component\HttpKernel\HttpCache;
 
+use Symfony\Component\Filesystem\Filesystem;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 
@@ -343,7 +344,7 @@ private function save($key, $data)
             return false;
         }
 
-        $tmpFile = tempnam(dirname($path), basename($path));
+        $tmpFile = Filesystem::tempnam2(dirname($path), basename($path));
         if (false === $fp = @fopen($tmpFile, 'wb')) {
             return false;
         }
diff --git a/src/Symfony/Component/HttpKernel/composer.json b/src/Symfony/Component/HttpKernel/composer.json
index 3854dd389d1de..c0ef0eade0af3 100644
--- a/src/Symfony/Component/HttpKernel/composer.json
+++ b/src/Symfony/Component/HttpKernel/composer.json
@@ -32,7 +32,8 @@
         "symfony/process": "~2.0",
         "symfony/routing": "~2.2",
         "symfony/stopwatch": "~2.2",
-        "symfony/templating": "~2.2"
+        "symfony/templating": "~2.2",
+        "symfony/filesystem": "~2.4"
     },
     "suggest": {
         "symfony/browser-kit": "",
diff --git a/src/Symfony/Component/Translation/Loader/XliffFileLoader.php b/src/Symfony/Component/Translation/Loader/XliffFileLoader.php
index 0cafc043ac904..2ab8a76ca0414 100644
--- a/src/Symfony/Component/Translation/Loader/XliffFileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/XliffFileLoader.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Translation\Loader;
 
+use Symfony\Component\Filesystem\Filesystem;
 use Symfony\Component\Translation\MessageCatalogue;
 use Symfony\Component\Translation\Exception\InvalidResourceException;
 use Symfony\Component\Translation\Exception\NotFoundResourceException;
@@ -111,7 +112,7 @@ private function parseFile($file)
         $location = str_replace('\\', '/', __DIR__).'/schema/dic/xliff-core/xml.xsd';
         $parts = explode('/', $location);
         if (0 === stripos($location, 'phar://')) {
-            $tmpfile = tempnam(sys_get_temp_dir(), 'sf2');
+            $tmpfile = Filesystem::tempnam2(sys_get_temp_dir(), 'sf2');
             if ($tmpfile) {
                 copy($location, $tmpfile);
                 $parts = explode('/', str_replace('\\', '/', $tmpfile));
diff --git a/src/Symfony/Component/Translation/composer.json b/src/Symfony/Component/Translation/composer.json
index 37fef30451385..eb4af845f410f 100644
--- a/src/Symfony/Component/Translation/composer.json
+++ b/src/Symfony/Component/Translation/composer.json
@@ -20,7 +20,8 @@
     },
     "require-dev": {
         "symfony/config": "~2.0",
-        "symfony/yaml": "~2.2"
+        "symfony/yaml": "~2.2",
+        "symfony/filesystem": "~2.4"
     },
     "suggest": {
         "symfony/config": "",