/**
* Calculate unique version hash for all plugins and core.
* @static
* @return string sha1 hash
*/
public static function get_version_hash()
{
global $CFG;
if (self::$versionhash) {
return self::$versionhash;
}
$versions = array();
// main version first
$version = null;
include $CFG->dirroot . '/version.php';
$versions['core'] = $version;
// modules
$mods = get_plugin_list('mod');
ksort($mods);
foreach ($mods as $mod => $fullmod) {
$module = new stdClass();
$module->version = null;
include $fullmod . '/version.php';
$versions[$mod] = $module->version;
}
// now the rest of plugins
$plugintypes = get_plugin_types();
unset($plugintypes['mod']);
ksort($plugintypes);
foreach ($plugintypes as $type => $unused) {
$plugs = get_plugin_list($type);
ksort($plugs);
foreach ($plugs as $plug => $fullplug) {
$plugin = new stdClass();
$plugin->version = null;
@(include $fullplug . '/version.php');
$versions[$plug] = $plugin->version;
}
}
self::$versionhash = sha1(serialize($versions));
return self::$versionhash;
}
