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                                    getenv

   (PHP 3, PHP 4 )
   getenv -- Gets the value of an environment variable

Description

   string getenv ( string varname)

   Returns the value of the environment variable varname, or FALSE on an
   error.

   <?php
   $ip = getenv("REMOTE_ADDR"); // get the ip number of the user
   ?>

   You can see a list of all the environmental variables by using
   phpinfo(). You can find out what many of them mean by taking a look at
   the CGI specification, specifically the page on environmental
   variables.

     Note: This function does not work in ISAPI mode.

   See also putenv().
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