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# getenv

getenv -- Get the value of an environment variable

## Description

`string getenv`(string varname);

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

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      2 $ip = getenv("REMOTE_ADDR"); // get the ip number of the user
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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.

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