php导出csv

/**

     *

     * @param $filename 要导出的文件名

     * @param $firstline 第一行内容数组

     *            eg $firstline = ['姓名','性别','年龄'];

     * @param $data 要导出的内容数组

     *            二维数组 eg [['name'=>'xx','sex'=>'xx','1'],['name'=>'xx','sex'=>'xx','1']]

     */

    public static function export_csv($filename, $firstlinearr, $dataarr)

    {

        $str = '';

        foreach ($firstlinearr as $first) {

            $first = str_replace(array("\r\n", "\r", "\n"), '', $first);

            $str .= ',' . iconv('utf-8', 'gbk//IGNORE', $first); // 中文转码

        }

        $str = ltrim($str, ',') . "\n";

        foreach ($dataarr as $val) {

            $valuestr = '';

            foreach ($val as $value) {

                $value = str_replace(array("\r\n", "\r", "\n"), '', $value);

                $valuestr .= ',' . iconv('utf-8', 'gbk//IGNORE', $value); // 中文转码

            }

            $str .= ltrim($valuestr, ',') . "\n";

        }

        $filename = $filename . date('YmdHis') . '.csv'; // 设置文件名

        header("Content-type:text/csv");

        header("Content-Disposition:attachment;filename=" . $filename);

        header('Cache-Control:must-revalidate,post-check=0,pre-check=0');

        header('Expires:0');

        header("Pragma: no-cache");

        echo $str;

        exit();

    }