diff --git a/admin/tool/dbtransfer/cli/migrate.php b/admin/tool/dbtransfer/cli/migrate.php
index 545be35857a..35b3be7c1be 100644
--- a/admin/tool/dbtransfer/cli/migrate.php
+++ b/admin/tool/dbtransfer/cli/migrate.php
@@ -90,7 +90,7 @@ $drivers = tool_dbtransfer_get_drivers();
 
 if (!isset($options['dbtype'])) {
     $choose = array();
-    foreach ($drivers as $driver=>$name) {
+    foreach ($drivers as $driver => $name) {
         list($dbtype, $dblibrary) = explode('/', $driver);
         $choose[$dbtype] = $dbtype;
     }
@@ -100,7 +100,7 @@ if (!isset($options['dbtype'])) {
 }
 
 $choose = array();
-foreach ($drivers as $driver=>$name) {
+foreach ($drivers as $driver => $name) {
     list($dbtype, $dblibrary) = explode('/', $driver);
     if ($dbtype === $options['dbtype']) {
         $choose[$dblibrary] = $dblibrary;
@@ -108,7 +108,7 @@ foreach ($drivers as $driver=>$name) {
 }
 if (!isset($options['dblibrary']) or !isset($choose[$options['dblibrary']])) {
     $optionsstr = implode(', ', $choose);
-    cli_heading('Database library'." ($optionsstr)"); // note: no need to localise unless we add real PDO drivers
+    cli_heading('Database library'." ($optionsstr)"); // Note: no need to localise unless we add real PDO drivers.
     $options['dblibrary'] = cli_input(get_string('clitypevalue', 'admin'), '', $choose, true);
 }
 
@@ -149,7 +149,8 @@ if ($CFG->ostype !== 'WINDOWS') {
     }
 }
 
-$a = (object)array('dbtypefrom'=>$CFG->dbtype, 'dbtype'=>$options['dbtype'], 'dbname'=>$options['dbname'], 'dbhost'=>$options['dbhost']);
+$a = (object)array('dbtypefrom' => $CFG->dbtype, 'dbtype' => $options['dbtype'],
+    'dbname' => $options['dbname'], 'dbhost' => $options['dbhost']);
 cli_heading(get_string('transferringdbto', 'tool_dbtransfer', $a));
 
 // Try target DB connection.
@@ -164,7 +165,8 @@ if ($options['dbsocket']) {
     $dboptions['dbsocket'] = $options['dbsocket'];
 }
 try {
-    $targetdb->connect($options['dbhost'], $options['dbuser'], $options['dbpass'], $options['dbname'], $options['prefix'], $dboptions);
+    $targetdb->connect($options['dbhost'], $options['dbuser'], $options['dbpass'], $options['dbname'],
+        $options['prefix'], $dboptions);
     if ($targetdb->get_tables()) {
         $problem .= get_string('targetdatabasenotempty', 'tool_dbtransfer');
     }
diff --git a/admin/tool/dbtransfer/database_export_form.php b/admin/tool/dbtransfer/database_export_form.php
index 50646ad484a..1fb8b9c2ee3 100644
--- a/admin/tool/dbtransfer/database_export_form.php
+++ b/admin/tool/dbtransfer/database_export_form.php
@@ -29,10 +29,16 @@ require_once($CFG->libdir.'/formslib.php');
 
 /**
  * Definition of db export settings form.
+ *
+ * @package    tool_dbtransfer
+ * @copyright  2008 Petr Skoda {@link http://skodak.org/}
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class database_export_form extends moodleform {
-
-    function definition() {
+    /**
+     * Define the export form.
+     */
+    public function definition() {
         $mform = $this->_form;
 
         $mform->addElement('header', 'database', get_string('dbexport', 'tool_dbtransfer'));
diff --git a/admin/tool/dbtransfer/database_transfer_form.php b/admin/tool/dbtransfer/database_transfer_form.php
index 9f89b50f1c1..d8a9923a017 100644
--- a/admin/tool/dbtransfer/database_transfer_form.php
+++ b/admin/tool/dbtransfer/database_transfer_form.php
@@ -30,6 +30,9 @@ require_once(__DIR__.'/locallib.php');
 
 /**
  * Definition of db transfer settings form.
+ *
+ * @copyright  2008 Petr Skoda {@link http://skodak.org/}
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class database_transfer_form extends moodleform {
 
diff --git a/admin/tool/dbtransfer/dbexport.php b/admin/tool/dbtransfer/dbexport.php
index 2672cfd5834..f55b29d0312 100644
--- a/admin/tool/dbtransfer/dbexport.php
+++ b/admin/tool/dbtransfer/dbexport.php
@@ -40,6 +40,6 @@ if ($data = $form->get_data()) {
 }
 
 echo $OUTPUT->header();
-// TODO: add some more info here
+// TODO: add some more info here.
 $form->display();
 echo $OUTPUT->footer();
diff --git a/admin/tool/dbtransfer/locallib.php b/admin/tool/dbtransfer/locallib.php
index 6a553eb51d9..8b0b0622f54 100644
--- a/admin/tool/dbtransfer/locallib.php
+++ b/admin/tool/dbtransfer/locallib.php
@@ -52,7 +52,7 @@ require_once($CFG->libdir.'/dtllib.php');
 function tool_dbtransfer_export_xml_database($description, $mdb) {
     @set_time_limit(0);
 
-    session_get_instance()->write_close(); // release session
+    session_get_instance()->write_close(); // Release session.
 
     header('Content-Type: application/xhtml+xml; charset=utf-8');
     header('Content-Disposition: attachment; filename=database.xml');
@@ -65,7 +65,7 @@ function tool_dbtransfer_export_xml_database($description, $mdb) {
     $var = new file_xml_database_exporter('php://output', $mdb);
     $var->export_database($description);
 
-    // no more output
+    // No more output.
     die;
 }
 
@@ -79,7 +79,7 @@ function tool_dbtransfer_export_xml_database($description, $mdb) {
 function tool_dbtransfer_transfer_database(moodle_database $sourcedb, moodle_database $targetdb, progress_trace $feedback = null) {
     @set_time_limit(0);
 
-    session_get_instance()->write_close(); // release session
+    session_get_instance()->write_close(); // Release session.
 
     $var = new database_mover($sourcedb, $targetdb, true, $feedback);
     $var->export_database(null);
@@ -106,9 +106,9 @@ function tool_dbtransfer_rebuild_target_log_actions(moodle_database $target, pro
         $DB->delete_records('log_display', array('component'=>'moodle'));
         log_update_descriptions('moodle');
         $plugintypes = get_plugin_types();
-        foreach ($plugintypes as $type=>$location) {
+        foreach ($plugintypes as $type => $location) {
             $plugs = get_plugin_list($type);
-            foreach ($plugs as $plug=>$fullplug) {
+            foreach ($plugs as $plug => $fullplug) {
                 $component = $type.'_'.$plug;
                 $DB->delete_records('log_display', array('component'=>$component));
                 log_update_descriptions($component);
diff --git a/admin/tool/dbtransfer/settings.php b/admin/tool/dbtransfer/settings.php
index a1390ef6375..47175423670 100644
--- a/admin/tool/dbtransfer/settings.php
+++ b/admin/tool/dbtransfer/settings.php
@@ -25,7 +25,9 @@
 defined('MOODLE_INTERNAL') || die;
 
 if ($hassiteconfig) {
-    $ADMIN->add('experimental', new admin_externalpage('tooldbtransfer', get_string('dbtransfer', 'tool_dbtransfer'), $CFG->wwwroot.'/'.$CFG->admin.'/tool/dbtransfer/index.php', 'moodle/site:config', false));
+    $ADMIN->add('experimental', new admin_externalpage('tooldbtransfer', get_string('dbtransfer', 'tool_dbtransfer'),
+        $CFG->wwwroot.'/'.$CFG->admin.'/tool/dbtransfer/index.php', 'moodle/site:config', false));
     // DB export/import is not ready yet - keep it hidden for now.
-    $ADMIN->add('experimental', new admin_externalpage('tooldbexport', get_string('dbexport', 'tool_dbtransfer'), $CFG->wwwroot.'/'.$CFG->admin.'/tool/dbtransfer/dbexport.php', 'moodle/site:config', true));
+    $ADMIN->add('experimental', new admin_externalpage('tooldbexport', get_string('dbexport', 'tool_dbtransfer'),
+        $CFG->wwwroot.'/'.$CFG->admin.'/tool/dbtransfer/dbexport.php', 'moodle/site:config', true));
 }
diff --git a/admin/tool/dbtransfer/version.php b/admin/tool/dbtransfer/version.php
index 53113be9a04..59bafe585cf 100644
--- a/admin/tool/dbtransfer/version.php
+++ b/admin/tool/dbtransfer/version.php
@@ -24,6 +24,6 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$plugin->version   = 2012062200; // The current plugin version (Date: YYYYMMDDXX)
-$plugin->requires  = 2012061700; // Requires this Moodle version
-$plugin->component = 'tool_dbtransfer'; // Full name of the plugin (used for diagnostics)
+$plugin->version   = 2012062200; // The current plugin version (Date: YYYYMMDDXX).
+$plugin->requires  = 2012061700; // Requires this Moodle version.
+$plugin->component = 'tool_dbtransfer'; // Full name of the plugin (used for diagnostics).