关于使用阿里云主机报错“realpath() [function.realpath]: open_basedir restriction in effect”的解决办法

最近在使用阿里云主机的时候，发现用PHPEXCEL导出数据表时，系统报出以下错误：

Warning: realpath() [function.realpath]: open_basedir restriction in effect. File(/tmp) is not within the allowed path(s): (/data/home/byu2599880001/:/usr/home/byu2599880001/:/data/home/tmp/:/usr/home/tmp/:/var/www/disablesite/) in /data/home/byu2599880001/htdocs/peixun/PHPExcel/Shared/File.php on line 136

在网上查询，有些是让修改PHP.INI文件，但一般用主机类的用户都没有权限进行设置，后来在网上查询，是可以通过修改PHPExcel/Shared/File.php文件进行解决。

查找到以下代码函数function sys_get_temp_dir()

public static function sys_get_temp_dir()
 
{
 
    // sys_get_temp_dir is only available since PHP 5.2.1
    // http://php.net/manual/en/function.sys-get-temp-dir.php#94119
 
    if (!function_exists('sys_get_temp_dir')) {
 
        if ($temp = getenv('TMP')) {
 
            if (file_exists($temp)) {
                return realpath($temp);
            }
 
        }
 
        if ($temp = getenv('TEMP')) {
 
            if (file_exists($temp)) {
                return realpath($temp);
            }
 
        }
 
        if ($temp = getenv('TMPDIR')) {
 
            if (file_exists($temp)) {
                return realpath($temp);
            }
 
        }
 
        // trick for creating a file in system's temporary dir
        // without knowing the path of the system's temporary dir
        $temp = tempnam(__FILE__, '');
 
        if (file_exists($temp)) {
 
            unlink($temp);
 
            return realpath(dirname($temp));
 
        }
 
        return null;
 
    }
 
    // use ordinary built-in PHP function
    //There should be no problem with the 5.2.4 Suhosin realpath() bug, because this line should only
    //be called if we're running 5.2.1 or earlier
    return realpath(sys_get_temp_dir());
 
}

将以上代码替换为以下代码：

public static function sys_get_temp_dir()
 
{
 
    // use upload-directory when defined to make it running on
    // environments having very restricted open_basedir configs
    if (ini_get('upload_tmp_dir') !== false) {
 
        if ($temp = ini_get('upload_tmp_dir')) {
 
            if (file_exists($temp)) {
                return realpath($temp);
            }
 
        }
 
    }
 
    // sys_get_temp_dir is only available since PHP 5.2.1
    // http://php.net/manual/en/function.sys-get-temp-dir.php#94119
 
    if (!function_exists('sys_get_temp_dir')) {
 
        if ($temp = getenv('TMP')) {
 
            if (file_exists($temp)) {
 
                return realpath($temp);
 
            }
 
            if (($temp != '') && file_exists($temp)) {
 
                return realpath($temp);
 
            }
 
        }
 
        if ($temp = getenv('TEMP')) {
 
            if (file_exists($temp)) {
 
                return realpath($temp);
 
            }
 
        }
 
    }
 
}

只需要将函数里的程序代码替换一下即可，函数名不用动。替换后问题解决。

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