Question

我在数据库中导入数据，并且我想在文本文件中向用户提供一些错误/反馈，但我不确定如何处理它。我的代码很长，所以我将一个示例代码写入文件

<?php
$myfile = fopen("newfile.txt", "w") or die("Unable to open file!");
$txt = "John Doe\n";
fwrite($myfile, $txt);
$txt = "Jane Doe\n";
fwrite($myfile, $txt);
fclose($myfile);
?>

在这种情况下，我希望＆＃34; John Doe＆＃34;在我的文件中两次并上传到屏幕以便用户可以下载

Answer 1

您可以使用php readfile()将文件发送到输出缓冲区。您可以查看php文档以获取有关如何执行此操作的示例。 Readfile()

样本看起来像这样

if (file_exists($myfile)) {
    header('Content-Description: File Transfer');
    header('Content-Type: application/octet-stream');
    header('Content-Disposition: attachment; filename="'.basename($myfile).'"');
    header('Cache-Control: must-revalidate');
    header('Content-Length: ' . filesize($myfile));
    readfile($myfile);
    exit;
}

Answer 2

您可能想尝试下面的代码段：

    <?php

    $fileName       = "data-log.txt";

    // IF THE FILE DOES NOT EXIST, WRITE TO IT AS YOU OPEN UP A STREAM,
    // OTHERWISE, JUST APPEND TO IT...
    if(!file_exists($fileName)){
        $fileMode   = "w";
    }else{
        $fileMode   = "a";
    }

    // OPEN THE FILE FOR WRITING OR APPENDING...
    $fileHandle     = fopen($fileName, $fileMode) or die("Unable to open file!");
    $txt            = "John Doe\n";
    fwrite($fileHandle, $txt);

    $txt            = "Jane Doe\n";
    fwrite($fileHandle, $txt);
    fclose($fileHandle);


    // PUT THE FILE UP FOR DOWNLOAD:
    processDownload($fileName);

    function processDownload($fileName) {
        if($fileName){
            if(file_exists($fileName)){
                $size   = @filesize($fileName);
                header('Content-Description: File Transfer');
                header('Content-Type: application/octet-stream');
                header('Content-Disposition: attachment; filename=' . $fileName);
                header('Content-Transfer-Encoding: binary');
                header('Connection: Keep-Alive');
                header('Expires: 0');
                header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
                header('Pragma: public');
                header('Content-Length: ' . $size);
                readfile($fileName);
                exit;
            }
        }
        return FALSE;
    }
?>

PHP写入文件并上传到屏幕

2 个答案: