[*] BO : the option for accented URLs is now available in the backend

classes/Tools.php

@@ -978,11 +978,11 @@ class ToolsCore
 		if ($allow_accented_chars === null)
 			$allow_accented_chars = Configuration::get('PS_ALLOW_ACCENTED_CHARS_URL');
 
+		$str = trim($str);
+
 		if (function_exists('mb_strtolower'))
 			$str = mb_strtolower($str, 'utf-8');
-
+		elseif (!$allow_accented_chars)
-		$str = trim($str);
-		if (!function_exists('mb_strtolower') || !$allow_accented_chars)
 			$str = Tools::replaceAccentedChars($str);
 
 		// Remove all non-whitelist chars.
@@ -990,7 +990,7 @@ class ToolsCore
 			$str = preg_replace('/[^a-zA-Z0-9\s\'\:\/\[\]-\pL]/u', '', $str);	
 		else
 			$str = preg_replace('/[^a-zA-Z0-9\s\'\:\/\[\]-]/','', $str);
-		
+
 		$str = preg_replace('/[\s\'\:\/\[\]-]+/', ' ', $str);
 		$str = str_replace(array(' ', '/'), '-', $str);
 

controllers/admin/AdminMetaController.php

@@ -64,6 +64,13 @@ class AdminMetaControllerCore extends AdminController
 				'type' => 'rewriting_settings',
 				'mod_rewrite' => $mod_rewrite
 			),
+			'PS_ALLOW_ACCENTED_CHARS_URL' => array(
+				'title' => $this->l('Accented URL'),
+				'desc' => $this->l('Enable if you want to allow accented characters in your friendly URLs.'),
+				'validation' => 'isBool',
+				'cast' => 'intval',
+				'type' => 'bool'
+			),
 			'PS_CANONICAL_REDIRECT' => array(
 				'title' => $this->l('Automatically redirect to the canonical URL.'),
 				'desc' => $this->l('Recommended, but your theme must be compliant.'),