PHP csv 下载与服务器上的文件副本不同

Question

我正在尝试制作一个查询数据库的 PHP 页面，在 tmp 文件夹中创建一个 CSV，然后将该 csv 发送到浏览器进行下载，但下载的文件仅包含 PHP 脚本中的最后一个回显，而不是该文件存储在服务器上（该文件保存在服务器上是完美的）。

<?php


$db_host = "localhost"; //can be "localhost" for local development
$db_username = "root";
$db_password = "";
$db_name = "seinventory";
$link = mysqli_connect($db_host,$db_username,$db_password,$db_name) or die(mysqli_error($link));


// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$softwareName = $_GET['soft'];

$result = mysqli_query($link,"SELECT * FROM `seinventory` WHERE software LIKE '%$softwareName%' or apps LIKE '%$softwareName%'");
$timeStamp = date('d.m.Y-h.i.s');
$csvFile = 'C:/xampp/htdocs/tmp/file.csv';
$new_csv = fopen($csvFile, 'w');
$headings = Array('PC Name','Software Name','Software Version');
fputcsv($new_csv, $headings);
while($row = mysqli_fetch_array($result))
{
    $pcName = $row['pcName'];
    $software = $row['software'];
    $app = $row['apps'];
    $softwareArray = explode(";", $software);
    $appArray = explode(";", $app);
    $multiArray = array_merge($softwareArray, $appArray);
    foreach ( $multiArray as $value ) {
        $singleSoftwareArray = explode(":", $value);
        $softwareItem = $singleSoftwareArray[0];
        $pcName = str_replace('.domain.local', '', $pcName);
        if (stripos($softwareItem, $softwareName)  !== false) {
            $singleArray = Array($pcName, $singleSoftwareArray[0], $singleSoftwareArray[1]);
            fputcsv($new_csv, $singleArray);
        }

}
}
fclose($new_csv);

mysqli_close($link);
    // tell the browser it's going to be a csv file
header('Content-Type: application/csv');
    // tell the browser we want to save it instead of displaying it
header('Content-Disposition: attachment; filename="file.csv";');


//unlink($csvFile);
echo "<script>window.close();</script>";

我在某处阅读了我应该退出的地方； 在 fclose 停止写入文件之后，但我在服务器上的文件是完美的，不知何故它在下载过程中被更改。

Answer 1

您必须回显 CSV 文件的内容才能获得正确的文件。 从您的代码中删除最后一个 echo 并将其替换为这个。

echo file_get_contents('C:/xampp/htdocs/tmp/file.csv');

当您在本地存储文件时，您还可以将用户重定向到文件 URL，它应该会触发下载。 如果你这样做，你就不必传递 content-disposition 标头。 如果您决定这样做，您必须删除提供 Content-Type、Content-Disposition 标头和最后一个 echo 语句的行。

header("Location: tmp/file.csv");

如果您只是临时创建文件然后删除它，那么我建议您应该将数据存储在内存中并在之后回显。

<?php


$db_host = "localhost"; //can be "localhost" for local development
$db_username = "root";
$db_password = "";
$db_name = "seinventory";
$link = mysqli_connect($db_host,$db_username,$db_password,$db_name) or die(mysqli_error($link));


// Check connection
if (mysqli_connect_errno())
{
    echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$softwareName = $_GET['soft'];

$result = mysqli_query($link,"SELECT * FROM `seinventory` WHERE software LIKE '%$softwareName%' or apps LIKE '%$softwareName%'");
$timeStamp = date('d.m.Y-h.i.s');
$new_csv = fopen('php://memory', 'w+');
$headings = Array('PC Name','Software Name','Software Version');
fputcsv($new_csv, $headings);
while($row = mysqli_fetch_array($result))
{
    $pcName = $row['pcName'];
    $software = $row['software'];
    $app = $row['apps'];
    $softwareArray = explode(";", $software);
    $appArray = explode(";", $app);
    $multiArray = array_merge($softwareArray, $appArray);
    foreach ( $multiArray as $value ) {
        $singleSoftwareArray = explode(":", $value);
        $softwareItem = $singleSoftwareArray[0];
        $pcName = str_replace('.domain.local', '', $pcName);
        if (stripos($softwareItem, $softwareName)  !== false) {
            $singleArray = Array($pcName, $singleSoftwareArray[0], $singleSoftwareArray[1]);
            fputcsv($new_csv, $singleArray);
        }

    }
}

mysqli_close($link);
    // tell the browser it's going to be a csv file
header('Content-Type: application/csv');
    // tell the browser we want to save it instead of displaying it
header('Content-Disposition: attachment; filename="file.csv";');

// set the file pointer position back to 0
rewind($new_csv);

// echo all the contents from current file pointer position(In this case from start of the file)
echo stream_get_contents($new_csv);