Yii 2.0.9 发布了，Yii是一个高性能的PHP5的web应用程序开发框架。通过一个简单的命令行工具 yiic 可以快速创建一个web应用程序的代码框架，开发者可以在生成的代码框架基础上添加业务逻辑，以快速完成应用程序的开发。

本次发布累计60多项改进，其中包括增加一些新功能和问题修复。主要性能改进：

• Message translation performance was increased for database backend by examining queries and adding proper indexes.

• Oracle database schema was improved to be read faster.

一些增强：

• Enh #10422: Added null method on yii\db\ColumnSchemaBuilder to explicitly set column nullability (nevermnd)

• Enh #11168: yii\helpers\BaseHtml now uses abstracted booleanInput() and activeBooleanInput() methods to render radio(), checkbox(), activeRadio() and activeCheckbox() (cesarnicola)

• Enh #11195: Added ability to append custom string to schema builder column definition (df2, samdark)

• Enh #11212: Added headers to PO file in yii\i18n\GettextPoFile::save() (stevekr)

• Enh #11414: Files specified as null in yii\web\AssetBundle won't be registered (Razzwan)

• Enh #11428: Speedup SQL query in yii\db\oci\Schema::findColumns() (SSiwek)

• Enh #11432: Added HTTP status 421 "Misdirected Request" to list of statuses in yii\web\Response (dasmfm)

• Enh #11438: Configurable yii\helpers\Markdown default flavor (mdmunir)

• Enh #11462: Added support of filtering rules to yii\log\Target::$logVar (HaruAtari)

• Enh #11462: Added \yii\helpers\BaseArrayHelper::filter() method (HaruAtari)

• Enh #11484: Speed up yii\db\oci\Schema::loadTableSchema() for Oracle DBMS (SSiwek)

• Enh #11490: Added yii\data\ArrayDataProvider::$modelClass property to specify a model used to provide column labels even when data array is empty (PowerGamer1)

• Enh #11591: Added support for wildcards for only and except at yii\base\ActionFilter (klimov-paul)

• Enh #11679: Extracted CheckAccessInterface from ManagerInterface (SamMousa, samdark, mdomba)

• Enh #11725: Added indexes on message tables (OndrejVasicek)

• Enh #11729: Added yii\grid\CheckboxColumn::$cssClass property to specify a class added to checkbox input (thiagotalma)

• Enh #11808: _table and _column suffixes are now required when generating migration (rob006)

• Enh #11850: Introduced yii\widgets\Pjax::$submitEvent to be able to customize event triggering PJAX form submit (Bvanleeuwen)

• Enh #11857: yii\filters\AccessRule::$verbs can now be configured in upper and lowercase (DrDeath72, samdark)

• Chg #11364: Updated jQuery dependency to include versions 1.12.* (cebe)

• Chg #11683: Fixed fixture command to work with short syntax. yii fixture "*, -User" should be used instead of yii fixture "*" -User (Faryshta, samdark)

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