Question

我使用PHPExcel创建了文件，说C:\path\goes\here\filename.xls 当我尝试使用header(),访问它时，它会创建一个文件filename(1)，filename(2)，依此类推。（PS：当我说覆盖时，我的意思是删除以前的内容并添加新数据）。

<?php

include 'PHPExcel.php';

require_once ("C:\\xampp\\htdocs\\excel_mailer_2\\PHPMailer-master\\class.phpmailer.php");

$path           =   "C:\\Users\\Manish\\Downloads";
$file_name      =   $_GET['file_name'];

$DB_server      =   "localhost";
$DB_username    =   "root";
$DB_password    =   "";
$DB_dbname      =   "timetracker";
$DB_tablename   =   "tt_users";

$conn           =   mysqli_connect ($DB_server, $DB_username, $DB_password, $DB_dbname);

if (mysqli_connect_errno()) {
    die ("Connection Failed!");
}

$sql    =   "SELECT *";
$sql    .=  " FROM $DB_tablename";

if ($result = mysqli_query($conn,$sql));

else die("Couldn't execute query:<br />" . mysqli_error(). "<br />" . mysqli_errno());

$file_ending = ".xls";

$filename = $file_name.$file_ending;

//header("Content-Type: application/vnd.ms-excel");
header("Content-Disposition: attachment; filename=$filename");



/*******Start of Formatting for Excel*******/

$sep        = "\t";
$flag       = true;
$col_names  = "";

while($row = mysqli_fetch_assoc($result)) {
    $data_insert    = "";
            foreach($row as $field=>$data) {
        if ($flag)
            $col_names      .= $field.$sep;
        if(!isset($data))
            $data_insert    .= "NULL".$sep;
        elseif ($data != "")
            $data_insert    .= $data.$sep;
        else
            $data_insert    .= "".$sep;
    }

    if ($flag) {
        $flag       = !$flag;
        $col_names  .= "\t";
        echo (trim($col_names));
        echo "\n";
    }
    $data_insert    .= "\t";
    echo (trim($data_insert));
    echo "\n";
}
?>

Answer 1

您好使用此

在filename函数中写下header

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

Answer 2

您可以使用 php basename() 函数获取该特定路径下的文件名，然后检查您正在创建的文件是否已经存在。如果它已经存在，则删除旧文件并创建新文件。 https://www.w3schools.com/php/func_filesystem_basename.asp

这应该在你调用 header("Content-Disposition: attachment; filename=$filename"); 之前完成；

我可以使用PHP覆盖excel文件吗？

2 个答案: