今天在apache下的php项目一访问报错。错误为

Internal Server Error

The server encountered an internal error ormisconfiguration and was unable to completeyour request.

Please contact the server administrator at admin@example.com to inform them of the time this error occurred, and the actions you performed just before this error.

More information about this error may be availablein the server error log.

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Apache/2.4.9 (Win32) PHP/5.5.12 Server at localhost Port 80

查看apache_error.log发现

[Thu Jun 26 09:06:07.013701 2014] [core:alert] [pid 7128:tid 956] [client 127.0.0.1:50158] D:/wamp/www/opencart/.htaccess: Invalid command ‘RewriteEngine’, perhaps misspelled or defined by a module not included in the server configuration

解决1：
1. 打开 httpd.conf
2.找到 mod_rewrite.so 行,将前面的注释打开(即删掉前面的'#'符号)。
3.关闭httpd.conf,重启apache服务器即可。 

解决2：
httpd.conf 中找到你网站目录对应的Directory 行,将其中的 RewriteEngine 项设置为 'ALL'。