Add check on libxml2 version (2.7 minimum)

check_setup.php

@@ -2,7 +2,6 @@
 
 // PHP 5.3 minimum
 if (version_compare(PHP_VERSION, '5.3.0', '<')) {
-
     die('This software require PHP 5.3.0 minimum');
 }
 
@@ -10,41 +9,39 @@ if (version_compare(PHP_VERSION, '5.3.0', '<')) {
 if (version_compare(PHP_VERSION, '5.4.0', '<')) {
 
     if (! ini_get('short_open_tag')) {
-
         die('This software require to have short tags enabled, check your php.ini => "short_open_tag = On"');
     }
 }
 
+// Old libxml2 version are not supported (Debian Lenny is too old)
+if (version_compare(LIBXML_DOTTED_VERSION, '2.7.0', '<')) {
+    die('This software require at least libxml2 version 2.7.0');
+}
+
 // Check XML functions
 if (! function_exists('simplexml_load_string')) {
-
     die('PHP extension required: SimpleXML');
 }
 
 if (! function_exists('xml_parser_create')) {
-
     die('PHP extension required: XML Parser');
 }
 
 if (! function_exists('dom_import_simplexml')) {
-
     die('PHP extension required: DOM');
 }
 
 // Check PDO Sqlite
 if (! extension_loaded('pdo_sqlite')) {
-
     die('PHP extension required: pdo_sqlite');
 }
 
 // Check for curl
 if (! function_exists('curl_init') && ! ini_get('allow_url_fopen')) {
-
     die('You must have "allow_url_fopen=On" or curl extension installed');
 }
 
 // Check if /data is writeable
 if (! is_writable('data')) {
-
     die('The directory "data" must be writeable by your web server user');
 }