简单代码生成csv文件（excel）

       $arr = array('');//  目标数组
        header("Content-Type:application/vnd.ms-excel;charset=gbk");
        header("Content-Disposition: attachment;filename='文件.csv'");

        header('Cache-Control: max-age=0');
        $fp = fopen('php://output', 'a');
        $head = array('手机号', '姓名','职位', '公司');
        foreach ($head as $i => $v) {
            $head[$i] = iconv('utf-8', 'gbk', $v);
        }
        fputcsv($fp, $head);
        foreach($arr as $vv){
            $row = [$vv['phone'],$vv['username'],$vv['job'],($vv['company'])];
            foreach ($row as $key => $val) {
                $row[$key] = iconv('utf-8', 'gbk', $val);
            }
            fputcsv($fp, $row);
        }
        ob_flush();
        flush();