From: moodler <moodler>
Date: Sat, 23 Aug 2003 12:22:27 +0000 (+0000)
Subject: Added a new function to make a unique ID code, to be used in quiz
X-Git-Url: http://git.mjollnir.org/gw?a=commitdiff_plain;h=280faf9ff7f73a65d4c6b9382cb7fdc0955ad8a1;p=moodle.git

Added a new function to make a unique ID code, to be used in quiz
questions and elsewhere

It's based on the hostname, time, random string and a supplied version string.
These are packed using '+ separators so they can easily be unpacked if
necessary.

function make_unique_id_code($version=1)
---

diff --git a/lib/moodlelib.php b/lib/moodlelib.php
index 19f764ed71..b626f2916a 100644
--- a/lib/moodlelib.php
+++ b/lib/moodlelib.php
@@ -1685,6 +1685,27 @@ function make_grades_menu($gradingtype) {
     return $grades;
 }
 
+function make_unique_id_code($version=1) {
+
+    $hostname = "unknownhost";
+    if (!empty($_SERVER["HTTP_HOST"])) {
+        $hostname = $_SERVER["HTTP_HOST"];
+    } else if (!empty($_ENV["HTTP_HOST"])) {
+        $hostname = $_ENV["HTTP_HOST"];
+    } else if (!empty($_SERVER["SERVER_NAME"])) {
+        $hostname = $_SERVER["SERVER_NAME"];
+    } else if (!empty($_ENV["SERVER_NAME"])) {
+        $hostname = $_ENV["SERVER_NAME"];
+    }
+
+    $date = date("ymdHis");
+
+    $random =  random_string(6);
+
+    return "$hostname+$date+$random+$version";
+    
+}
+
 
 // vim:autoindent:expandtab:shiftwidth=4:tabstop=4:tw=140:
 ?>