使用Yii已经做了好几个web应用了，发现这个东西越来越好用了。它的

1. 灵活，
2. 插件的丰富，
3. 功能的齐全，
4. 开发的便利，
5. 诊断的便利，

让我爱不释手。今天谈谈Yii给你提供一个便利，能够测试你当前系统的配置是否满足了yii运行条件。

这里的系统总括

• 操作系统
• apche/httpd
• php

有个便利可以让你很容易检测因为你的系统导致的Yii某些功能不能正常的原因。其方法是通过运行yii/requirements/index.php，如：

http://localhost/yii-1.1.13.e9e4a0/requirements/

你会看到

Description

This script checks if your server configuration meets the requirementsfor running
Yii Web applications.It checks if the server is running the right version of PHP,if appropriate PHP extensions have been loaded, and if php.ini file settings are correct.

Conclusion

Your server configuration satisfies the minimum requirements by Yii. Please pay attention to the warnings listed below if your application will use the corresponding features.

Details

Name	Result	Required By	Memo
PHP version	Passed	Yii Framework	PHP 5.1.0 or higher is required.
$_SERVER variable	Passed	Yii Framework
Reflection extension	Passed	Yii Framework
PCRE extension	Passed	Yii Framework
SPL extension	Passed	Yii Framework
DOM extension	Passed	CHtmlPurifier, CWsdlGenerator
PDO extension	Passed	All DB-related classes
PDO SQLite extension	Passed	All DB-related classes	This is required if you are using SQLite database.
PDO MySQL extension	Passed	All DB-related classes	This is required if you are using MySQL database.
PDO PostgreSQL extension	Warning	All DB-related classes	This is required if you are using PostgreSQL database.
PDO Oracle extension	Warning	All DB-related classes	This is required if you are using Oracle database.
PDO MSSQL extension (pdo_mssql)	Warning	All DB-related classes	This is required if you are using MSSQL database from MS Windows
PDO MSSQL extension (pdo_dblib)	Warning	All DB-related classes	This is required if you are using MSSQL database from GNU/Linux or other UNIX.
PDO MSSQL extension (pdo_sqlsrv)	Warning	All DB-related classes	This is required if you are using MSSQL database with the driver provided by Microsoft.
Memcache extension	Passed	CMemCache
APC extension	Warning	CApcCache
Mcrypt extension	Warning	CSecurityManager	This is required by encrypt and decrypt methods.
SOAP extension	Warning	CWebService, CWebServiceAction
GD extension with FreeType support or ImageMagick extension with PNG support	Passed	CCaptchaAction
Ctype extension	Passed	CDateFormatter, CDateTimeParser, CTextHighlighter, CHtmlPurifier

passed

failed

warning

如果你的result那一列时warning，你就需要注意一下了。

我的Yii验证码不能工作就时因为GD那一项时warning导致的。

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