Add @param ['additional_data'] Additional data to be included in checksum

1 files changed, 3 insertions, 1 deletions

diff --git a/itjs.class b/itjs.class
index 85d5d11..174feab 100644
--- a/itjs.class
+++ b/itjs.class
@@ -189,6 +189,8 @@ static function strip($code)
 /**
  * Compute checksum for list of files
  * @param $fnlist Either comma separated UNTRUSTED url (will check itjs/ and lib.search.ch/itjs/) or array of TRUSTED filenames
+ * @param $p['short_expire']     Check filemtime and generate short expires for new files
+ * @param $p['additional_data']  Additional data to be included in checksum
  * @return Checksum for given files
  */
 static function checksum($fnlist, $p = array())
@@ -199,7 +201,7 @@ static function checksum($fnlist, $p = array())
 	foreach (is_array($fnlist) ? $fnlist : itjs::filenames($fnlist) as $filename)
 		$filenames[] = !file_exists($filename) && file_exists($t = it::replace(array('^/www/[^/]*' => "/www/lib.search.ch"), $filename)) ? $t : $filename;
 
-	$key = "itjs_" . md5(join("", it::map('"$v" . @filemtime("$v")', $filenames)));
+	$key = "itjs_" . md5(join("", it::map('"$v" . @filemtime("$v")', $filenames)) . '|' . json_encode($p['additional_data']));
 
 	if ($filenames && $p['short_expire'] && (time() - max(@array_map('filemtime', $filenames)) < 60))
 		return "-"; # trigger short expire, our file may not yet be up to date on other slaves