php导出csv文件，可导出前导0实例

实例一：可导出前导0

//导出csv格式文件 $data数据 $title_arr标题 $file_name文件名
function exportCsv($data,$title_arr,$file_name=""){
    ini_set("max_execution_time", "3600");

    $csv_data = "";
    /** 标题 */
    $nums = count($title_arr);

    for ($i = 0; $i < $nums - 1; ++$i) {
        $csv_data .= """ . $title_arr[$i] . "",";
    }
    if ($nums > 0) {
        $csv_data .= """ . $title_arr[$nums - 1] . ""
";
    }

    foreach ($data as $k => $row) {
        foreach ($row as $key => $r){

            $row[$key] = str_replace(""", """", $r);

            $csv_data .= ""	" . $row[$key] . "",";
        }

        $csv_data .= """ . $row[$nums - 1] . ""
";
        unset($data[$k]);
    }
    $csv_data = mb_convert_encoding($csv_data, "cp936", "UTF-8");
    $file_name = empty($file_name) ? date("Y-m-d-H-i-s", time()) : $file_name;
    if (strpos($_SERVER["HTTP_USER_AGENT"], "MSIE")) { // 解决IE浏览器输出中文名乱码的bug
        $file_name = urlencode($file_name);
        $file_name = str_replace("+", "%20", $file_name);
    }
    $file_name = $file_name . ".csv";
    header("Content-Type: application/download");
    header("Content-type:text/csv;");
    header("Content-Disposition:attachment;filename=" . $file_name);
    header("Cache-Control:must-revalidate,post-check=0,pre-check=0");
    header("Expires:0");
    header("Pragma:public");
    echo $csv_data;
    exit();
}

注释：不可以直接输出超链接！