fixed broken links

docs/guide/output-formatter.md

@@ -87,7 +87,7 @@ The formatter class provides different methods for formatting date and time valu
 The date and time format for the [[yii\i18n\Formatter::asDate()|date]], [[yii\i18n\Formatter::asTime()|time]], and
 [[yii\i18n\Formatter::asDatetime()|datetime]] method can be specified globally by configuring the formatters
 properties [[yii\i18n\Formatter::$dateFormat|$dateFormat]], [[yii\i18n\Formatter::$timeFormat|$timeFormat]], and
-[[yii\i18n\Formatter::$datetimeFormat()|$datetimeFormat]].
+[[yii\i18n\Formatter::$datetimeFormat|$datetimeFormat]].
 
 By default the formatter uses a shortcut format that is interpreted differently according to the currently active locale
 so that dates and times are formatted in a way that is common for the users country and language.

docs/guide/start-databases.md

@@ -18,7 +18,7 @@ In particular, you should know how to create a database, and how to execute SQL
 
 
 Preparing the Database <a name="preparing-database"></a>
---------------------
+----------------------
 
 To begin, create a database named `yii2basic`, from which you will fetch data in your application.
 You may create an SQLite, MySQL, PostgreSQL, MSSQL or Oracle database, as Yii has built-in support for many database applications. For simplicity, MySQL will be assumed in the following description.

extensions/codeception/README.md

@@ -281,4 +281,4 @@ Then run command `php codecept.phar run --debug unit/SomeDebugTest` and you will
 
 ```
 
-For further instructions refer to the testing section in the [Yii Definitive Guide](https://github.com/yiisoft/yii2/blob/master/docs/guide/testing.md).
+For further instructions refer to the testing section in the [Yii Definitive Guide](https://github.com/yiisoft/yii2/blob/master/docs/guide/test-overview.md).

extensions/elasticsearch/README.md

@@ -59,7 +59,7 @@ TBD
 Using the ActiveRecord
 ----------------------
 
-For general information on how to use yii's ActiveRecord please refer to the [guide](https://github.com/yiisoft/yii2/blob/master/docs/guide/active-record.md).
+For general information on how to use yii's ActiveRecord please refer to the [guide](https://github.com/yiisoft/yii2/blob/master/docs/guide/db-active-record.md).
 
 For defining an elasticsearch ActiveRecord class your record class needs to extend from [[yii\elasticsearch\ActiveRecord]] and
 implement at least the [[yii\elasticsearch\ActiveRecord::attributes()|attributes()]] method to define the attributes of the record.

framework/db/Connection.php

@@ -15,11 +15,11 @@ use yii\base\NotSupportedException;
 use yii\caching\Cache;
 
 /**
- * Connection represents a connection to a database via [PDO](http://www.php.net/manual/en/ref.pdo.php).
+ * Connection represents a connection to a database via [PDO](php.net/manual/en/book.pdo.php).
  *
  * Connection works together with [[Command]], [[DataReader]] and [[Transaction]]
  * to provide data access to various DBMS in a common set of APIs. They are a thin wrapper
- * of the [[PDO PHP extension]](http://www.php.net/manual/en/ref.pdo.php).
+ * of the [[PDO PHP extension]](php.net/manual/en/book.pdo.php).
  *
  * Connection supports database replication and read-write splitting. In particular, a Connection component
  * can be configured with multiple [[masters]] and [[slaves]]. It will do load balancing and failover by choosing