[*] Installer: check if sessions path if writable

classes/ConfigurationTest.php

@@ -47,6 +47,7 @@ class ConfigurationTestCore
 			'upload' => false,
 			'gd' => false,
 			'mysql_support' => false,
+			'sessions' => false,
 			'config_dir' => 'config',
 			'cache_dir' => 'cache',
 			'sitemap' => 'sitemap.xml',
@@ -305,6 +306,13 @@ class ConfigurationTestCore
 		return function_exists('mcrypt_encrypt');
 	}
 
+	public static function test_sessions()
+	{
+		if (!$path = @ini_get('session.save_path'))
+			return true;
+
+		return ConfigurationTest::test_dir($path);
+	}
 	public static function test_dom()
 	{
 		return extension_loaded('Dom');

install-dev/controllers/http/system.php

@@ -74,6 +74,7 @@ class InstallControllerHttpSystem extends InstallControllerHttp
 		if (!isset($this->tests['optional']))
 			$this->tests['optional'] = $this->model_system->checkOptionalTests();
 
+		$session_path = @ini_get('session.save_path');
 		// Generate display array
 		$this->tests_render = array(
 			'required' => array(
@@ -86,6 +87,7 @@ class InstallControllerHttpSystem extends InstallControllerHttp
 						'system' => $this->l('Cannot create new files and folders'),
 						'gd' => $this->l('GD Library is not installed'),
 						'mysql_support' => $this->l('MySQL support is not activated'),
+						'sessions' => $this->l('Your PHP sessions path is not writable - check with your hosting provider:').' '.$session_path,
 					)
 				),
 				array(