more postgres support

program/include/cache.inc

@@ -69,7 +69,7 @@ function rcube_write_cache($key, $data, $session_cache=FALSE)
   if ($CACHE_KEYS[$key])
     {
     $DB->query("UPDATE ".get_table_name('cache')."
-                SET    created=NOW(),
+                SET    created=now(),
                        data=?
                 WHERE  user_id=?
                 AND    cache_key=?",
@@ -82,7 +82,7 @@ function rcube_write_cache($key, $data, $session_cache=FALSE)
     {
     $DB->query("INSERT INTO ".get_table_name('cache')."
                 (created, user_id, session_id, cache_key, data)
-                VALUES (NOW(), ?, ?, ?, ?)",
+                VALUES (now(), ?, ?, ?, ?)",
                 $_SESSION['user_id'],
                 $session_cache ? $sess_id : 'NULL',
                 $key,

program/include/main.inc

@@ -299,7 +299,7 @@ function rcmail_login($user, $pass, $host=NULL)
       
     // update user's record
     $DB->query("UPDATE ".get_table_name('users')."
-                SET    last_login=NOW()
+                SET    last_login=now()
                 WHERE  user_id=?",
                 $user_id);
     }
@@ -336,7 +336,7 @@ function rcmail_create_user($user, $host)
   
   $DB->query("INSERT INTO ".get_table_name('users')."
               (created, last_login, username, mail_host, language)
-              VALUES (NOW(), NOW(), ?, ?, ?)",
+              VALUES (now(), now(), ?, ?, ?)",
               $user,
               $host,
 		      $_SESSION['user_lang']);

program/include/session.inc

@@ -70,7 +70,7 @@ function sess_write($key, $vars)
     session_decode($vars);
     $DB->query("UPDATE ".get_table_name('session')."
                 SET    vars=?,
-                       changed=NOW()
+                       changed=now()
                 WHERE  sess_id=?",
                 $vars,
                 $key);
@@ -79,7 +79,7 @@ function sess_write($key, $vars)
     {
     $DB->query("INSERT INTO ".get_table_name('session')."
                 (sess_id, vars, ip, created, changed)
-                VALUES (?, ?, ?, NOW(), NOW())",
+                VALUES (?, ?, ?, now(), now())",
                 $key,
                 $vars,
                 $_SERVER['REMOTE_ADDR']);
@@ -115,7 +115,7 @@ function sess_gc($maxlifetime)
   // get all expired sessions  
   $sql_result = $DB->query("SELECT sess_id
                             FROM ".get_table_name('session')."
-                            WHERE ".$DB->unixtimestamp('NOW()')."-".$DB->unixtimestamp('created')." > ?",
+                            WHERE ".$DB->unixtimestamp('now()')."-".$DB->unixtimestamp('created')." > ?",
                             $maxlifetime);
                                    
   $a_exp_sessions = array();