Initial commit.

lib/php/monica/timezone.inc.php

@@ -0,0 +1,32 @@
+<?php
+// File name:	timezone.inc.php
+// Description:	PHP subroutines to deal with time zone information
+// Date:	2004-04-05
+// Author:	imacat <imacat@pristine.com.tw>
+// Copyright:	Copyright (C) 2004-2007 Pristine Communications
+
+// timezone_iso: Return the timezone in ISO 8601 format
+function timezone_iso()
+{
+    // Cache the result
+    static $cache;
+    // Return the cache
+    if (isset($cache)) {
+        return $cache;
+    }
+    
+    // Calculate the time zone string
+    $tzsec = date("Z");
+    $tzsign = ($tzsec >= 0? "+": "-");
+    $tzsec = abs($tzsec);
+    $tzmin = floor($tzsec / 60);
+    $tzsec = $tzsec % 60;
+    $tzhr = floor($tzmin / 60);
+    $tzmin = $tzmin % 60;
+    $tz = sprintf("%s%02d:%02d", $tzsign, $tzhr, $tzmin);
+    // Cache it
+    $cache = $tz;
+    return $tz;
+}
+
+?>