Question

下载文件时出现此错误

特别是pdf文件。

以及下载管理器等程序在下载时无效。

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这是我的PHP代码下载

<?php


$company =$_GET['company'];

// Make sure an ID was passed
if(isset($_GET['id'])) {
// Get the ID
$id = intval($_GET['id']);

// Make sure the ID is in fact a valid ID
if($id <= 0) {
    die('The ID is invalid!');
}
else {
    // Connect to the database
    $dbLink = new mysqli('localhost', 'sqldata', 'sqldata', 'balhaf');
    if(mysqli_connect_errno()) {
        die("MySQL connection failed: ". mysqli_connect_error());
    }

    // Fetch the file information
    $query = "
        SELECT mime, name, size, data
        FROM $company
        WHERE id = $id";
    $result = $dbLink->query($query);

    if($result) {
        // Make sure the result is valid
        if($result->num_rows == 1) {
        // Get the row
            $row = mysqli_fetch_assoc($result);

            // Print headers
            header("Content-Type: ". $row['mime']);
            header("Content-Length: ". $row['size']);
            header("Content-Disposition: attachment; filename=". $row['name']);

            // Print data
            echo $row['data'];
        }
        else {
            echo 'Error! No image exists with that ID.';
        }

        // Free the mysqli resources
        @mysqli_free_result($result);
        }
        else {
        echo "Error! Query failed: <pre>{$dbLink->error}</pre>";
        }
        @mysqli_close($dbLink);
        }
        }
        else {
        echo 'Error! No ID was passed.';
        }
        ?>

Answer 1

在MySQL中使用BLOB以防止数据因编码而发生更改（可能存在产生错误的编码问题，因为BLOB是二进制安全的，因此保存）

与Binary Data in MySQL

在PHP中下载文件时出错

2 个答案: