出错提示:Security Alert! The PHP CGI cannot be accessed directly

c. This PHP CGI binary was compiled with force-cgi-redirect enabled. This means that a page will only be served up if the REDIRECT_STATUS CGI variable is set, e.g. via an Apache Action directive.
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修改php.ini将cgi.force_redirect设为0，然后重起IIS


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除了楼上的可能外，Apache默认目录权限未配置也会造成该提示生效。
修改Apache Conf目录httpd.conf

<Directory />
Options None
AllowOverride All
Order allow,deny
Allow from all
</Directory>

把PHP配置成二进制CGI绑定
ScriptAlias /php/ "d:/php/"
AddType application/x-httpd-php .php
Action application/x-httpd-php "/php/php.exe"

若不想配置成CGI方式，可以用模块方式配置
LoadModule php4_module d:/php/sapi/php4apache.dll
AddModule mod_php4.c
AddType application/x-httpd-php .php

注意根据你机器中的路径修改!