<?php
// File name:	cgiemu.inc.php
// Description:	PHP subroutines to set the CGI environment emulation
// Date:	2007-08-31
// Author:	imacat <imacat@pristine.com.tw>
// Copyright:	Copyright (C) 2007 Pristine Communications

// Constant symbols
if (!defined("_CGIEMU_SET")) {
    _set_cgi_emu();
    define("_CGIEMU_SET", true);
}

// add_get_arg: Add a get argument to the end of an url
function _set_cgi_emu()
{
    // php-cgi can work on both web and console,
    // but only CLI has STDIN and STDERR
    define("IS_CGI", getenv("GATEWAY_INTERFACE") !== false);
    // Only work if we are not under CGI environment
    if (IS_CGI) {
        return;
    }
    // GATEWAY_INTERFACE
    if (!array_key_exists("GATEWAY_INTERFACE", $_SERVER)) {
        $_SERVER["GATEWAY_INTERFACE"] = "";
        putenv("GATEWAY_INTERFACE=" . $_SERVER["GATEWAY_INTERFACE"]);
    }
    // QUERY_STRING
    if (!array_key_exists("QUERY_STRING", $_SERVER)) {
        $_SERVER["QUERY_STRING"] = "";
        putenv("QUERY_STRING=" . $_SERVER["QUERY_STRING"]);
    }
    // REMOTE_ADDR
    if (!array_key_exists("REMOTE_ADDR", $_SERVER)) {
        $_SERVER["REMOTE_ADDR"] = "127.0.0.1";
        putenv("REMOTE_ADDR=" . $_SERVER["REMOTE_ADDR"]);
    }
    // REMOTE_HOST
    if (!array_key_exists("REMOTE_HOST", $_SERVER)) {
        $_SERVER["REMOTE_HOST"] = "localhost";
        putenv("REMOTE_HOST=" . $_SERVER["REMOTE_HOST"]);
    }
    // REQUEST_METHOD
    if (!array_key_exists("REQUEST_METHOD", $_SERVER)) {
        $_SERVER["REQUEST_METHOD"] = "GET";
        putenv("REQUEST_METHOD=" . $_SERVER["REQUEST_METHOD"]);
    }
    // SERVER_NAME
    if (!array_key_exists("SERVER_NAME", $_SERVER)) {
        $_SERVER["SERVER_NAME"] = php_uname("n");
        putenv("SERVER_NAME=" . $_SERVER["SERVER_NAME"]);
    }
    // SERVER_PORT
    if (!array_key_exists("SERVER_PORT", $_SERVER)) {
        $_SERVER["SERVER_PORT"] = 80;
        putenv("SERVER_PORT=" . $_SERVER["SERVER_PORT"]);
    }
    // SERVER_SOFTWARE
    if (!array_key_exists("SERVER_SOFTWARE", $_SERVER)) {
        $_SERVER["SERVER_SOFTWARE"] = PHP_OS;
        putenv("SERVER_SOFTWARE=" . $_SERVER["SERVER_SOFTWARE"]);
    }
    // session.save_path
    $sessdir = ini_get("session.save_path");
    if ($sessdir != "" && !is_writable($sessdir)) {
        // Use the temporarily working directory in user's home first
        $sessdir = getenv("HOME") . "/tmp";
        if (!is_writable($sessdir)) {
            // Use system temporarily working directory
            $sessdir = sys_get_temp_dir();
        }
        ini_set("session.save_path", $sessdir);
    }
    return;
}

?>