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try searching for cgi.force_redirect in your php.ini file. You may be able to fix it simply by changing that
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try searching for cgi.force_redirect in your php.ini file. You may be able to fix it simply by changing that

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i already did that in php.ini
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using php5.2 windows server 2008 iis7<br />
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HTTP Error 502.2 - Bad Gateway<br />
The specified CGI application misbehaved by not returning a complete set of HTTP headers. The headers it did return are &quot;&lt;b&gt;Security Alert!&lt;/b&gt; The PHP CGI cannot be accessed directly. &lt;p&gt;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.&lt;/p&gt; &lt;p&gt;For more information as to &lt;i&gt;why&lt;/i&gt; this behaviour exists, see the &lt;a href=&quot;<a href="http://php.net/security.cgi-bin" rel="ugc">http://php.net/security.cgi-bin</a>&quot;&gt;manual page for CGI security&lt;/a&gt;.&lt;/p&gt; &lt;p&gt;For more information about changing this behaviour or re-enabling this webserver, consult the installation file that came with this distribution, or visit &lt;a href=&quot;<a href="http://php.net/install.windows" rel="ugc">http://php.net/install.windows</a>&quot;&gt;the manual page&lt;/a&gt;.&lt;/p&gt; &quot;.
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using php5.2 windows server 2008 iis7


HTTP Error 502.2 - Bad Gateway
The specified CGI application misbehaved by not returning a complete set of HTTP headers. The headers it did return are "<b>Security Alert!</b> The PHP CGI cannot be accessed directly. <p>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.</p> <p>For more information as to <i>why</i> this behaviour exists, see the <a href="http://php.net/security.cgi-bin">manual page for CGI security</a>.</p> <p>For more information about changing this behaviour or re-enabling this webserver, consult the installation file that came with this distribution, or visit <a href="http://php.net/install.windows">the manual page</a>.</p> ".

HTTP Error 502.2 - Bad Gateway

PHP is a widely-used server-side scripting language especially suited for web development, powering tens of millions of sites from Facebook to personal WordPress blogs. PHP is often paired with the MySQL relational database, but includes support for most other mainstream databases. By utilizing different Server APIs, PHP can work on many different web servers as a server-side scripting language.

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.

Windows Server 2008

IIS is Internet Information Services, the web server included with Windows Server operating systems. All current versions are built on a modular architecture; modules can be added or removed individually so that those required for specific functionality are installed. The full installation of IIS includes HTTP, security, content, compression, caching, logging and diagnostics.