PHP远程读取excel文件，如何读取？

<br />
file_put_contents('abc.xls',file_get_contents('http://www.xx.com/abc.xls'));<br />

        public function read($sFileName)<br />
        {<br />
                // Check if file exists and is readable<br />
                if(!is_readable($sFileName)) {<br />
                        throw new Exception("Could not open " . $sFileName . " for reading! File does not exist, or it is not readable.");<br />
                }<br />
<br />
                // Get the file data<br />
                $this->data = file_get_contents($sFileName);<br />