php-doc-en/reference/nsapi/functions/nsapi-virtual.xml

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  <refentry id="function.nsapi-virtual">
   <refnamediv>
    <refname>nsapi_virtual</refname>
    <refpurpose>Perform an NSAPI sub-request</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
     <methodsynopsis>
      <type>int</type><methodname>nsapi_virtual</methodname>
      <methodparam><type>string</type><parameter>uri</parameter></methodparam>
     </methodsynopsis>
    <para>
     <function>nsapi_virtual</function> is an NSAPI-specific function which
     is equivalent to &lt;!--#include virtual...--&gt; in SSI
     (<filename>.shtml</filename> files). It does an NSAPI sub-request.
     It is useful for including CGI scripts or .shtml files, or anything
     else that you'd parse through webserver.
    </para>
    <para>
     To run the sub-request, all buffers are terminated and flushed to the
     browser, pending headers are sent too.
    </para>
    <para>
     You cannot make recursive requests with this function to other PHP scripts.
     If you want to include PHP scripts, use <function>include</function> or
     <function>require</function>.
    </para>
    <note>
     <para>
      This function depends on a undocumented feature of the Netscape/iPlanet/SunONE
      webservers. Use <function>phpinfo</function> to determine if it is available.
      In the unix environment it should always work, in windows it depends on the name of
      a <filename>ns-httpdXX.dll</filename> file.
      Read the note about <link linkend='install.netscape.notes'>subrequests in the
      install section</link> if you experience this problem.
     </para>
    </note>
   </refsect1>
  </refentry>

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