]> git.mxchange.org Git - mailer.git/blobdiff - inc/extensions.php
Rewrite for fixing reported error message at ticket #56
[mailer.git] / inc / extensions.php
index 18650ab5e0c1af0660ba359ee3ff2d8bdb2380b8..62ab4f43018852eede4458dad60983498b366e17 100644 (file)
 
 // Some security stuff...
 if (!defined('__SECURITY')) {
-       $INC = substr(dirname(__FILE__), 0, strpos(dirname(__FILE__), "/inc") + 4) . "/security.php";
+       $INC = substr(dirname(__FILE__), 0, strpos(dirname(__FILE__), '/inc') + 4) . '/security.php';
        require($INC);
 }
 
 // Load the extension and maybe found language and function files.
-function LOAD_EXTENSION ($ext_name, $EXT_LOAD_MODE = "", $EXT_VER = "", $dry_run = false) {
+function LOAD_EXTENSION ($ext_name, $EXT_LOAD_MODE = '', $EXT_VER = '', $dry_run = false) {
        // Set current extension name
        EXT_SET_CURR_NAME($ext_name);
 
@@ -61,6 +61,8 @@ function LOAD_EXTENSION ($ext_name, $EXT_LOAD_MODE = "", $EXT_VER = "", $dry_run
        if ((isset($GLOBALS['ext_loaded']['ext'][$ext_name])) && (empty($EXT_LOAD_MODE))) {
                // Debug message
                DEBUG_LOG(__FUNCTION__, __LINE__, sprintf("Extension %s already loaded.", $ext_name));
+
+               // Abort here
                return false;
        } // END - if
 
@@ -69,44 +71,54 @@ function LOAD_EXTENSION ($ext_name, $EXT_LOAD_MODE = "", $EXT_VER = "", $dry_run
        $FQFN = constant('PATH') . $INC;
 
        // Is the extension file NOT there?
-       if (!INCLUDE_READABLE($INC)) {
+       if (!isIncludeReadable($INC)) {
                // Debug message
-               DEBUG_LOG(__FUNCTION__, __LINE__, sprintf("Extension %s not found.", $ext_name));
+               DEBUG_LOG(__FUNCTION__, __LINE__, sprintf("Extension %s not found or not readable.", $ext_name));
 
                // Abort here
                return false;
        } // END - if
 
        // Construct FQFN for language file
-       $langInclude = sprintf("inc/language/%s_%s.php", $ext_name, GET_LANGUAGE());
+       $langInclude = sprintf("inc/language/%s_%s.php", $ext_name, getLanguage());
 
        // Is this include there?
-       if ((FILE_READABLE($langInclude)) && (!isset($GLOBALS['ext_loaded']['lang'][$ext_name]))) {
+       if ((isFileReadable($langInclude)) && (!isset($GLOBALS['ext_loaded']['lang'][$ext_name]))) {
                // Then load it
                //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "--- Language loaded.");
                $GLOBALS['ext_loaded']['lang'][$ext_name] = true;
-               LOAD_INC_ONCE($langInclude);
-       } // END - if
+               loadIncludeOnce($langInclude);
+       } elseif (($ext_name != 'sql_patches') && (substr($ext_name, 0, 10) != 'admintheme')) {
+               // No language file is not so good...
+               DEBUG_LOG(__FUNCTION__, __LINE__, sprintf("WARNING: Extension %s has no language file or we cannot read from it. lang=%s",
+                       $ext_name, getLanguage()
+               ));
+       }
 
        // Construct FQFN for functions file
        $funcsInclude = sprintf("inc/libs/%s_functions.php", $ext_name);
 
        // Is this include there?
-       if ((FILE_READABLE($funcsInclude)) && (!isset($GLOBALS['ext_loaded']['funcs'][$ext_name]))) {
+       if ((isFileReadable($funcsInclude)) && (!isset($GLOBALS['ext_loaded']['funcs'][$ext_name]))) {
                // Then load it
                //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "--- Functions loaded.");
                $GLOBALS['ext_loaded']['funcs'][$ext_name] = true;
-               LOAD_INC_ONCE($funcsInclude);
+               loadIncludeOnce($funcsInclude);
+       } elseif (($ext_name != 'sql_patches') && (substr($ext_name, 0, 10) != 'admintheme')) {
+               // No functions file is not so good...
+               DEBUG_LOG(__FUNCTION__, __LINE__, sprintf("WARNING: Extension %s has no own functions file or we cannot read from it.",
+                       $ext_name
+               ));
        } // END - if
 
        // Extensions are not deprecated by default
-       EXT_SET_DEPRECATED("N");
+       EXT_SET_DEPRECATED('N');
 
        // Extensions are not always active by default
-       EXT_SET_ALWAYS_ACTIVE("N");
+       EXT_SET_ALWAYS_ACTIVE('N');
 
        // Extension update notes
-       EXT_SET_UPDATE_NOTES("");
+       EXT_SET_UPDATE_NOTES('');
 
        // Include the extension file
        //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "Extension loaded.");
@@ -164,8 +176,8 @@ function REGISTER_EXTENSION ($ext_name, $task_id, $dry_run = false, $logout = tr
                if (($task_id == 0) && (!$dry_run)) {
                        // Then request a bug report
                        debug_report_bug(sprintf("%s: task_id is still zero after DETERMINE_EXTENSION_TASK_ID(%s)",
-                               __FUNCTION__,
-                               EXT_GET_CURR_NAME()
+                       __FUNCTION__,
+                       EXT_GET_CURR_NAME()
                        ));
                } // END - if
        } // END - if
@@ -226,7 +238,7 @@ function REGISTER_EXTENSION ($ext_name, $task_id, $dry_run = false, $logout = tr
                                                // Try to register the extension
                                                //* DEBUG: */ print __FUNCTION__."[".__LINE__."]:currName=".EXT_GET_CURR_NAME().":ext_update=".$ext_update.",taskId=".$task."<br />\n";
                                                $test = REGISTER_EXTENSION($ext_update, $task, $dry_run, false);
-                                               //* DEBUG: */ print __FUNCTION__."[".__LINE__."]:currName=".EXT_GET_CURR_NAME().":"; var_dump($test);
+                                               //* DEBUG: */ print __FUNCTION__."[".__LINE__."]:currName=".EXT_GET_CURR_NAME().':'; var_dump($test);
                                        } // END - if
                                } elseif ($ext_ver != EXT_GET_VERSION()) {
                                        // Ok, update this extension now
@@ -258,9 +270,9 @@ function REGISTER_EXTENSION ($ext_name, $task_id, $dry_run = false, $logout = tr
                $EXT_LOAD_MODE = 'register';
 
                // Remains true if extension registration reports no failures
-               //* DEBUG: */ print __FUNCTION__."[".__LINE__."]:currName=".EXT_GET_CURR_NAME().":"; var_dump($test);
+               //* DEBUG: */ print __FUNCTION__."[".__LINE__."]:currName=".EXT_GET_CURR_NAME().':'; var_dump($test);
                $test = (($test === true) && (EXT_GET_REPORTS_FAILURE() === false));
-               //* DEBUG: */ print __FUNCTION__."[".__LINE__."]:currName=".EXT_GET_CURR_NAME().":"; var_dump($test);
+               //* DEBUG: */ print __FUNCTION__."[".__LINE__."]:currName=".EXT_GET_CURR_NAME().':'; var_dump($test);
 
                // Does everthing before wents ok?
                if ($test === true) {
@@ -275,9 +287,9 @@ function REGISTER_EXTENSION ($ext_name, $task_id, $dry_run = false, $logout = tr
                                runFilterChain('pre_extension_installed', array('dry_run' => $dry_run));
 
                                // Register extension
-                               //* DEBUG: */ print __FUNCTION__."[".__LINE__."]:insert=".EXT_GET_CURR_NAME()."/".EXT_GET_VERSION()." - INSERT!<br />\n";
+                               //* DEBUG: */ print __FUNCTION__."[".__LINE__."]:insert=".EXT_GET_CURR_NAME().'/'.EXT_GET_VERSION()." - INSERT!<br />\n";
                                SQL_QUERY_ESC("INSERT INTO `{!_MYSQL_PREFIX!}_extensions` (ext_name, ext_active, ext_version) VALUES ('%s','%s','%s')",
-                                       array(EXT_GET_CURR_NAME(), EXT_GET_ALWAYS_ACTIVE(), EXT_GET_VERSION()), __FUNCTION__, __LINE__);
+                               array(EXT_GET_CURR_NAME(), EXT_GET_ALWAYS_ACTIVE(), EXT_GET_VERSION()), __FUNCTION__, __LINE__);
 
                                // Remove cache file(s) if extension is active
                                runFilterChain('post_extension_installed', array('ext_name' => EXT_GET_CURR_NAME(), 'task_id' => $task_id));
@@ -312,23 +324,23 @@ function REGISTER_EXTENSION ($ext_name, $task_id, $dry_run = false, $logout = tr
                        //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "".EXT_GET_CURR_NAME());
                        $ret = false;
                }
-       } elseif (($task_id > 0) && (EXT_GET_CURR_NAME() != "")) {
+       } elseif (($task_id > 0) && (EXT_GET_CURR_NAME() != '')) {
                //* DEBUG: */ print __FUNCTION__."[".__LINE__."]:currName=".EXT_GET_CURR_NAME()."<br />\n";
                // Remove task from system when id and extension's name is valid
-               SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM `{!_MYSQL_PREFIX!}_task_system` WHERE id=%s AND `status`='NEW' LIMIT 1",
-                       array(bigintval($task_id)), __FUNCTION__, __LINE__);
+               SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM `{!_MYSQL_PREFIX!}_task_system` WHERE `id`=%s AND `status`='NEW' LIMIT 1",
+               array(bigintval($task_id)), __FUNCTION__, __LINE__);
        }
 
        // Is this the sql_patches?
-       //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ":".EXT_GET_CURR_NAME()."/{$EXT_LOAD_MODE}");
+       //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ':'.EXT_GET_CURR_NAME()."/{$EXT_LOAD_MODE}");
        if ((EXT_GET_CURR_NAME() == 'sql_patches') && (($EXT_LOAD_MODE == 'register') || ($EXT_LOAD_MODE == 'remove')) && (!$dry_run) && ($test)) {
                //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ": LOAD!");
                if ($logout === true) {
                        // Then redirect to logout
-                       LOAD_URL("modules.php?module=admin&amp;logout=1&amp;".$EXT_LOAD_MODE."=sql_patches");
+                       redirectToUrl('modules.php?module=admin&amp;logout=1&amp;' . $EXT_LOAD_MODE . '=sql_patches');
                } else {
                        // Add temporary filter
-                       REGISTER_FILTER('shutdown', 'REDIRECT_TO_LOGOUT_SQL_PATCHES', true, true);
+                       registerFilter('shutdown', 'REDIRECT_TO_LOGOUT_SQL_PATCHES', true, true);
                        $GLOBALS['ext_load_mode'] = $EXT_LOAD_MODE;
                }
        } // END - if
@@ -349,7 +361,7 @@ function EXTENSION_RUN_SQLS ($ext_id, $load_mode) {
        $ext_name = GET_EXT_NAME($ext_id);
 
        // If it is not set then maybe there is no extension for that ID number
-       if ($ext_name == "") return false;
+       if ($ext_name == '') return false;
 
        // Set current SQL name
        EXT_SET_CURR_NAME($ext_name);
@@ -379,13 +391,13 @@ function EXTENSION_RUN_SQLS ($ext_id, $load_mode) {
                // Removal mode?
                if ($load_mode == 'remove') {
                        // Delete this extension (remember to remove it from your server *before* you click on welcome!
-                       SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM `{!_MYSQL_PREFIX!}_extensions` WHERE ext_name='%s' LIMIT 1",
+                       SQL_QUERY_ESC("DELETE LOW_PRIORITY FROM `{!_MYSQL_PREFIX!}_extensions` WHERE `ext_name`='%s' LIMIT 1",
                                array(EXT_GET_CURR_NAME()), __FUNCTION__, __LINE__);
                } // END - if
        } // END - if
 
        // Remove cache file(s) if extension is active
-       if (((EXT_IS_ACTIVE('cache')) || (GET_EXT_VERSION('cache') != "")) && (((SQL_AFFECTEDROWS() == 1)) || ($sqlRan === true) || ($load_mode == 'activate') || ($load_mode == 'deactivate'))) {
+       if (((EXT_IS_ACTIVE('cache')) || (GET_EXT_VERSION('cache') != '')) && (((SQL_AFFECTEDROWS() == 1)) || ($sqlRan === true) || ($load_mode == 'activate') || ($load_mode == 'deactivate'))) {
                // Run filters
                runFilterChain('post_extension_run_sql', EXT_GET_CURR_NAME());
        } // END - if
@@ -395,7 +407,7 @@ function EXTENSION_RUN_SQLS ($ext_id, $load_mode) {
        if ((EXT_GET_CURR_NAME() == 'sql_patches') && (($load_mode == 'register') || ($load_mode == 'remove'))) {
                // Then redirect to logout
                //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ": LOAD!");
-               LOAD_URL("modules.php?module=admin&amp;logout=1&amp;".$load_mode."=sql_patches");
+               redirectToUrl('modules.php?module=admin&amp;logout=1&amp;' . $load_mode . '=sql_patches');
        } // END - if
 }
 
@@ -405,7 +417,7 @@ function EXT_IS_ACTIVE ($ext_name) {
        if ((!isInstalled()) || (isInstalling()) || (empty($ext_name))) return false;
 
        // Not active is the default
-       $active = "N";
+       $active = 'N';
 
        // Check cache
        if (isset($GLOBALS['cache_array']['extensions']['ext_active'][$ext_name])) {
@@ -418,10 +430,10 @@ function EXT_IS_ACTIVE ($ext_name) {
        } elseif (isset($GLOBALS['ext_loaded'][$ext_name])) {
                // @TODO Extension is loaded, what next?
                app_die(__FUNCTION__, __LINE__, "LOADED:$ext_name");
-       } elseif (($ext_name == 'cache') || (GET_EXT_VERSION('cache') == "")) {
+       } elseif (($ext_name == 'cache') || (GET_EXT_VERSION('cache') == '')) {
                //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "DB! ext_name={$ext_name}");
                // Load from database
-               $result = SQL_QUERY_ESC("SELECT ext_active FROM `{!_MYSQL_PREFIX!}_extensions` WHERE ext_name='%s' LIMIT 1",
+               $result = SQL_QUERY_ESC("SELECT ext_active FROM `{!_MYSQL_PREFIX!}_extensions` WHERE `ext_name`='%s' LIMIT 1",
                        array($ext_name), __FUNCTION__, __LINE__);
 
                // Entry found?
@@ -439,7 +451,7 @@ function EXT_IS_ACTIVE ($ext_name) {
        } else {
                // Extension not active!
                //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "ext_name=".$ext_name.": Not active!");
-               $GLOBALS['cache_array']['extensions']['ext_active'][$ext_name] = "N";
+               $GLOBALS['cache_array']['extensions']['ext_active'][$ext_name] = 'N';
        }
 
        // Debug message
@@ -473,7 +485,7 @@ function GET_EXT_VERSION ($ext_name) {
                incrementConfigEntry('cache_hits');
        } elseif (!isCacheInstanceValid()) {
                // Load from database
-               $result = SQL_QUERY_ESC("SELECT ext_version FROM `{!_MYSQL_PREFIX!}_extensions` WHERE ext_name='%s' LIMIT 1",
+               $result = SQL_QUERY_ESC("SELECT ext_version FROM `{!_MYSQL_PREFIX!}_extensions` WHERE `ext_name`='%s' LIMIT 1",
                        array($ext_name), __FUNCTION__, __LINE__);
                //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, ": DB - ".SQL_NUMROWS($result)."");
 
@@ -481,7 +493,10 @@ function GET_EXT_VERSION ($ext_name) {
                if (SQL_NUMROWS($result) == 1) {
                        // Load entry
                        list($ext_ver) = SQL_FETCHROW($result);
-               } // END - if
+               } elseif (isDebugModeEnabled()) {
+                       // Not found!
+                       DEBUG_LOG(__FUNCTION__, __LINE__, sprintf(": Cannot find extension %s in database!", $ext_name));
+               }
 
                // Free result
                SQL_FREERESULT($result);
@@ -530,9 +545,9 @@ function EXTENSION_UPDATE ($ext_name, $ext_ver, $dry_run = false) {
                        // Load again...
                        LOAD_EXTENSION(EXT_GET_CURR_NAME(), 'update', $GLOBALS['cache_array']['update_ver'][EXT_GET_CURR_NAME()], $dry_run);
 
-                       if (EXT_GET_UPDATE_DEPENDS() != "") {
+                       if (EXT_GET_UPDATE_DEPENDS() != '') {
                                // Is the extension there?
-                               if (GET_EXT_VERSION(EXT_GET_UPDATE_DEPENDS()) != "") {
+                               if (GET_EXT_VERSION(EXT_GET_UPDATE_DEPENDS()) != '') {
                                        // Update another extension first!
                                        $test = EXTENSION_UPDATE(EXT_GET_UPDATE_DEPENDS(), GET_EXT_VERSION(EXT_GET_UPDATE_DEPENDS()), $dry_run);
                                } else {
@@ -562,11 +577,11 @@ function EXTENSION_UPDATE ($ext_name, $ext_ver, $dry_run = false) {
 
                if (!$dry_run) {
                        // Create task
-                       CREATE_EXTENSION_UPDATE_TASK(GET_CURRENT_ADMIN_ID(), EXT_GET_CURR_NAME(), $GLOBALS['cache_array']['update_ver'][EXT_GET_CURR_NAME()], SQL_ESCAPE(EXT_GET_NOTES(EXT_GET_NOTES())));
+                       CREATE_EXTENSION_UPDATE_TASK(getCurrentAdminId(), EXT_GET_CURR_NAME(), $GLOBALS['cache_array']['update_ver'][EXT_GET_CURR_NAME()], SQL_ESCAPE(EXT_GET_NOTES(EXT_GET_NOTES())));
 
                        // Update extension's version
-                       SQL_QUERY_ESC("UPDATE `{!_MYSQL_PREFIX!}_extensions` SET ext_version='%s' WHERE ext_name='%s' LIMIT 1",
-                               array($GLOBALS['cache_array']['update_ver'][EXT_GET_CURR_NAME()], EXT_GET_CURR_NAME()), __FUNCTION__, __LINE__);
+                       SQL_QUERY_ESC("UPDATE `{!_MYSQL_PREFIX!}_extensions` SET ext_version='%s' WHERE `ext_name`='%s' LIMIT 1",
+                       array($GLOBALS['cache_array']['update_ver'][EXT_GET_CURR_NAME()], EXT_GET_CURR_NAME()), __FUNCTION__, __LINE__);
 
                        // Remove arrays
                        UNSET_SQLS();
@@ -579,7 +594,7 @@ function EXTENSION_UPDATE ($ext_name, $ext_ver, $dry_run = false) {
 }
 
 // Output verbose SQL table for extension
-function EXTENSION_VERBOSE_TABLE ($queries = array(), $title = "", $dashed = "", $switch = false, $width = "100%") {
+function EXTENSION_VERBOSE_TABLE ($queries = array(), $title = '', $dashed = '', $switch = false, $width = '100%') {
        // Empty title?
        if (empty($title)) {
                // Then fix it to default
@@ -653,8 +668,8 @@ function GET_EXT_NAME ($ext_id) {
                incrementConfigEntry('cache_hits');
        } elseif (!EXT_IS_ACTIVE('cache')) {
                // Load from database
-               $result = SQL_QUERY_ESC("SELECT ext_name FROM `{!_MYSQL_PREFIX!}_extensions` WHERE id=%s LIMIT 1",
-                       array(bigintval($ext_id)), __FUNCTION__, __LINE__);
+               $result = SQL_QUERY_ESC("SELECT ext_name FROM `{!_MYSQL_PREFIX!}_extensions` WHERE `id`=%s LIMIT 1",
+               array(bigintval($ext_id)), __FUNCTION__, __LINE__);
                list($ret) = SQL_FETCHROW($result);
                SQL_FREERESULT($result);
        }
@@ -673,8 +688,8 @@ function GET_EXT_ID ($ext_name) {
                incrementConfigEntry('cache_hits');
        } elseif (!EXT_IS_ACTIVE('cache')) {
                // Load from database
-               $result = SQL_QUERY_ESC("SELECT id FROM `{!_MYSQL_PREFIX!}_extensions` WHERE ext_name='%s' LIMIT 1",
-                       array($ext_name), __FUNCTION__, __LINE__);
+               $result = SQL_QUERY_ESC("SELECT `id` FROM `{!_MYSQL_PREFIX!}_extensions` WHERE `ext_name`='%s' LIMIT 1",
+               array($ext_name), __FUNCTION__, __LINE__);
                list($ret) = SQL_FETCHROW($result);
                SQL_FREERESULT($result);
        }
@@ -686,8 +701,8 @@ function GET_EXT_ID ($ext_name) {
 // Activate given extension
 function ACTIVATE_EXTENSION ($ext_name) {
        // Activate the extension
-       SQL_QUERY_ESC("UPDATE `{!_MYSQL_PREFIX!}_extensions` SET ext_active='Y' WHERE ext_name='%s' LIMIT 1",
-               array($ext_name), __FUNCTION__, __LINE__);
+       SQL_QUERY_ESC("UPDATE `{!_MYSQL_PREFIX!}_extensions` SET `ext_active`='Y' WHERE `ext_name`='%s' LIMIT 1",
+       array($ext_name), __FUNCTION__, __LINE__);
 
        // Extension has been activated?
        if (SQL_AFFECTEDROWS() == 1) {
@@ -699,8 +714,8 @@ function ACTIVATE_EXTENSION ($ext_name) {
 // Deactivate given extension
 function DEACTIVATE_EXTENSION($ext_name) {
        // Activate the extension
-       SQL_QUERY_ESC("UPDATE `{!_MYSQL_PREFIX!}_extensions` SET ext_active='N' WHERE ext_name='%s' LIMIT 1",
-               array($ext_name), __FUNCTION__, __LINE__);
+       SQL_QUERY_ESC("UPDATE `{!_MYSQL_PREFIX!}_extensions` SET `ext_active`='N' WHERE `ext_name`='%s' LIMIT 1",
+       array($ext_name), __FUNCTION__, __LINE__);
 
        // Extension has been activated?
        if (SQL_AFFECTEDROWS() == 1) {
@@ -711,10 +726,10 @@ function DEACTIVATE_EXTENSION($ext_name) {
                CREATE_EXTENSION_DEACTIVATION_TASK($ext_name);
 
                // Notify the admin
-               SEND_ADMIN_NOTIFICATION(
-                       getMessage('ADMIN_SUBJECT_EXTENSION_DEACTIVATED'),
-                       "admin_ext_deactivated",
-                       array('ext_name' => $ext_name)
+               sendAdminNotification(
+               getMessage('ADMIN_SUBJECT_EXTENSION_DEACTIVATED'),
+                       'admin_ext_deactivated',
+               array('ext_name' => $ext_name)
                );
        } // END - if
 }
@@ -725,8 +740,8 @@ function EXT_VERSION_IS_OLDER ($ext_name, $ext_ver) {
        $currVersion = GET_EXT_VERSION($ext_name);
 
        // Remove all dots from both versions
-       $currVersion = str_replace(".", '', $currVersion);
-       $ext_ver = str_replace(".", '', $ext_ver);
+       $currVersion = str_replace('.', '', $currVersion);
+       $ext_ver = str_replace('.', '', $ext_ver);
 
        // Now compare both and return the result
        return ($currVersion < $ext_ver);
@@ -735,15 +750,15 @@ function EXT_VERSION_IS_OLDER ($ext_name, $ext_ver) {
 // Creates a new task for updated extension
 function CREATE_EXTENSION_UPDATE_TASK ($admin_id, $ext_name, $ext_ver, $notes) {
        // Create subject line
-       $subject = "[UPDATE-".$ext_name."-".$ext_ver.":] {--ADMIN_UPDATE_EXT_SUBJ--}";
+       $subject = '[UPDATE-'.$ext_name.'-'.$ext_ver.':] {--ADMIN_UPDATE_EXT_SUBJ--}';
 
        // Is the extension there?
-       if (GET_EXT_VERSION($ext_name) != "") {
+       if (GET_EXT_VERSION($ext_name) != '') {
                // Check if task is not there
                if (DETERMINE_TASK_ID_BY_SUBJECT($subject) == 0) {
                        // Task not created so it's a brand-new extension which we need to register and create a task for!
                        SQL_QUERY_ESC("INSERT INTO `{!_MYSQL_PREFIX!}_task_system` (assigned_admin, userid, status, task_type, subject, text, task_created) VALUES ('%s','0','NEW','EXTENSION_UPDATE','%s','%s', UNIX_TIMESTAMP())",
-                               array($admin_id, $subject, $notes), __FUNCTION__, __LINE__);
+                       array($admin_id, $subject, $notes), __FUNCTION__, __LINE__);
                } // END - if
        } // END - if
 }
@@ -751,21 +766,21 @@ function CREATE_EXTENSION_UPDATE_TASK ($admin_id, $ext_name, $ext_ver, $notes) {
 // Creates a new task for newly installed extension
 function CREATE_NEW_EXTENSION_TASK ($admin_id, $subject, $ext) {
        // Not installed and do we have created a task for the admin?
-       if ((DETERMINE_TASK_ID_BY_SUBJECT($subject) == 0) && (GET_EXT_VERSION($ext) == "")) {
+       if ((DETERMINE_TASK_ID_BY_SUBJECT($subject) == 0) && (GET_EXT_VERSION($ext) == '')) {
                // Template file
                $tpl = sprintf("%stemplates/%s/html/ext/ext_%s.tpl",
-                       constant('PATH'),
-                       GET_LANGUAGE(),
-                       $ext
+               constant('PATH'),
+               getLanguage(),
+               $ext
                );
 
                // Set default message if ext-foo is missing
                $msg = sprintf(getMessage('ADMIN_EXT_TEXT_FILE_MISSING'), $ext);
 
                // Load text for task if found
-               if (FILE_READABLE($tpl)) {
+               if (isFileReadable($tpl)) {
                        // Load extension's own text template (HTML!)
-                       $msg = LOAD_TEMPLATE("ext_" . $ext, true);
+                       $msg = LOAD_TEMPLATE('ext_' . $ext, true);
                } else {
                        // Write this in debug.log as well
                        DEBUG_LOG(__FUNCTION__, __LINE__, $msg);
@@ -774,11 +789,11 @@ function CREATE_NEW_EXTENSION_TASK ($admin_id, $subject, $ext) {
                // Task not created so it's a brand-new extension which we need to register and create a task for!
                SQL_QUERY_ESC("INSERT INTO `{!_MYSQL_PREFIX!}_task_system` (assigned_admin, userid, status, task_type, subject, text, task_created)
 VALUES (%s, 0, 'NEW', 'EXTENSION', '%s', '%s', UNIX_TIMESTAMP())",
-                       array(
-                               $admin_id,
-                               $subject,
-                               smartAddSlashes($msg),
-                       ),  __FUNCTION__, __LINE__, true, false, false
+               array(
+               $admin_id,
+               $subject,
+               smartAddSlashes($msg),
+               ),  __FUNCTION__, __LINE__, true, false, false
                );
        } // END - if
 }
@@ -789,14 +804,14 @@ function CREATE_EXTENSION_DEACTIVATION_TASK ($ext) {
        $subject = sprintf("[%s:] %s", $ext, getMessage('TASK_SUBJ_EXTENSION_DEACTIVATED'));
 
        // Not installed and do we have created a task for the admin?
-       if ((DETERMINE_TASK_ID_BY_SUBJECT($subject) == 0) && (GET_EXT_VERSION($ext) != "")) {
+       if ((DETERMINE_TASK_ID_BY_SUBJECT($subject) == 0) && (GET_EXT_VERSION($ext) != '')) {
                // Task not created so add it
                SQL_QUERY_ESC("INSERT INTO `{!_MYSQL_PREFIX!}_task_system` (assigned_admin, userid, status, task_type, subject, text, task_created)
 VALUES (0, 0, 'NEW', 'EXTENSION_DEACTIVATION', '%s', '%s', UNIX_TIMESTAMP())",
-                       array(
-                               $subject,
-                               SQL_ESCAPE(LOAD_TEMPLATE("task_ext_deactivated", true, $ext)),
-                       ),  __FUNCTION__, __LINE__, true, false
+               array(
+               $subject,
+               SQL_ESCAPE(LOAD_TEMPLATE('task_ext_deactivated', true, $ext)),
+               ),  __FUNCTION__, __LINE__, true, false
                );
        } // END - if
 }
@@ -824,7 +839,7 @@ function MODULE_HAS_MENU ($mod, $forceDb = false) {
        } elseif ((GET_EXT_VERSION('sql_patches') >= '0.3.6') && ((!EXT_IS_ACTIVE('cache')) || ($forceDb === true))) {
                // Check database for entry
                $result = SQL_QUERY_ESC("SELECT has_menu FROM `{!_MYSQL_PREFIX!}_mod_reg` WHERE `module`='%s' LIMIT 1",
-                       array($mod), __FUNCTION__, __LINE__);
+               array($mod), __FUNCTION__, __LINE__);
 
                // Entry found?
                if (SQL_NUMROWS($result) == 1) {
@@ -840,13 +855,13 @@ function MODULE_HAS_MENU ($mod, $forceDb = false) {
 
                // Free memory
                SQL_FREERESULT($result);
-       } elseif (GET_EXT_VERSION('sql_patches') == "") {
+       } elseif (GET_EXT_VERSION('sql_patches') == '') {
                // No sql_patches installed, so maybe in admin area or no admin registered?
                $ret = (((IS_ADMIN()) || (!isAdminRegistered())) && ($mod == 'admin')); // Then there is a menu!
        }
 
        // Return status
-       //* DEBUG: */ print __FUNCTION__."[".__LINE__."]:currName=".EXT_GET_CURR_NAME().":"; var_dump($ret);
+       //* DEBUG: */ print __FUNCTION__."[".__LINE__."]:currName=".EXT_GET_CURR_NAME().':'; var_dump($ret);
        return $ret;
 }
 
@@ -856,8 +871,8 @@ function DETERMINE_EXTENSION_TASK_ID ($ext_name) {
        $task_id = 0;
 
        // Search for extension task's id
-       $result = SQL_QUERY_ESC("SELECT id FROM `{!_MYSQL_PREFIX!}_task_system` WHERE task_type='EXTENSION' AND subject='[%s:]' LIMIT 1",
-               array($ext_name), __FUNCTION__, __LINE__);
+       $result = SQL_QUERY_ESC("SELECT `id` FROM `{!_MYSQL_PREFIX!}_task_system` WHERE task_type='EXTENSION' AND subject='[%s:]' LIMIT 1",
+       array($ext_name), __FUNCTION__, __LINE__);
 
        // Entry found?
        if (SQL_NUMROWS($result) == 1) {
@@ -878,8 +893,8 @@ function DETERMINE_TASK_ID_BY_SUBJECT ($subject) {
        $task_id = 0;
 
        // Search for task id
-       $result = SQL_QUERY_ESC("SELECT id FROM `{!_MYSQL_PREFIX!}_task_system` WHERE subject LIKE '%s%%' LIMIT 1",
-               array($subject), __FUNCTION__, __LINE__);
+       $result = SQL_QUERY_ESC("SELECT `id` FROM `{!_MYSQL_PREFIX!}_task_system` WHERE subject LIKE '%s%%' LIMIT 1",
+       array($subject), __FUNCTION__, __LINE__);
 
        // Entry found?
        if (SQL_NUMROWS($result) == 1) {
@@ -901,7 +916,6 @@ function ADD_EXTENSION_NOTES ($ver) {
 
        // Is do we have verbose output enabled?
        if ((getConfig('verbose_sql') == 'Y') || (!EXT_IS_ACTIVE('sql_patches'))) {
-
                // Update notes found?
                if (EXT_GET_UPDATE_NOTES() != '') {
                        // Update notes found
@@ -911,7 +925,7 @@ function ADD_EXTENSION_NOTES ($ver) {
                        );
 
                        // Reset them
-                       EXT_SET_UPDATE_NOTES("");
+                       EXT_SET_UPDATE_NOTES('');
                } elseif (($ver == '0.0') || ($ver == '0.0.0')) {
                        // Initial release
                        $content = array(
@@ -1007,7 +1021,7 @@ function EXT_ADD_UPDATE_DEPENDS ($updateDepends) {
 
        // Is it not yet added?
        if (!in_array($updateDepends, $GLOBALS['ext_running_updates'])) {
-               //* DEBUG */ DEBUG_LOG(__FUNCTION__, __LINE__, "currName=".EXT_GET_CURR_NAME()."/".$updateDepends);
+               //* DEBUG */ DEBUG_LOG(__FUNCTION__, __LINE__, "currName=".EXT_GET_CURR_NAME().'/'.$updateDepends);
                // Add it to the list of extension update depencies map
                $GLOBALS['ext_update_depends'][EXT_GET_CURR_NAME()][] = (string) $updateDepends;
 
@@ -1104,7 +1118,7 @@ function EXT_GET_UPDATE_ITERATOR () {
        if (!isset($GLOBALS['ext_depend_iterator'][EXT_GET_CURR_NAME()])) EXT_INIT_UPDATE_ITERATOR();
 
        // Return it
-       //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "currName=".EXT_GET_CURR_NAME()."/".$GLOBALS['ext_depend_iterator'][EXT_GET_CURR_NAME()]);
+       //* DEBUG: */ DEBUG_LOG(__FUNCTION__, __LINE__, "currName=".EXT_GET_CURR_NAME().'/'.$GLOBALS['ext_depend_iterator'][EXT_GET_CURR_NAME()]);
        return $GLOBALS['ext_depend_iterator'][EXT_GET_CURR_NAME()];
 }
 
@@ -1193,7 +1207,7 @@ function GET_EXT_SQLS () {
        if (!isset($GLOBALS['ext_sqls'][EXT_GET_CURR_NAME()])) {
                // Not found, should not happen
                debug_report_bug(sprintf("ext_sqls is empty, current extension: %s",
-                       EXT_GET_CURR_NAME()
+               EXT_GET_CURR_NAME()
                ));
        } // END - if
 
@@ -1236,5 +1250,26 @@ function EXT_GET_REMOVAL_LIST () {
        return $GLOBALS['ext_update_remove'];
 }
 
+// Redirects if the provided extension is not installed
+function redirectOnUninstalledExtension ($ext_name) {
+       // So is the extension there?
+       if ((!isExtensionInstalled($ext_name)) || (!EXT_IS_ACTIVE($ext_name))) {
+               // Redirect to index
+               redirectToUrl('modules.php?module=index&amp;msg=' . getCode('EXTENSION_PROBLEM') . '&amp;ext=' . $ext_name);
+       } // END - if
+}
+
+// Determines wether the given extension is installed
+function isExtensionInstalled ($ext_name) {
+       // Default is not installed
+       $isInstalled = false;
+
+       // Check cache ext_version
+       $isInstalled = isset($GLOBALS['cache_array']['extensions']['ext_version'][$ext_name]);
+
+       // Return status
+       return $isInstalled;
+}
+
 //
 ?>