在PHP中通过SQL预处理语句插入图像[重复]

Question

这个问题在这里已有答案：

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最近我试图通过准备好的语句将图像插入数据库。遗憾的是，在教程中没有关于如何包含除字符串之外的其他信息的信息。我想让我准备好的语句将图像传递到数据库这是我的代码不起作用。

$connect = mysqli_connect($hostname, $username, $password, $databaseName);
$fname = mysqli_real_escape_string($connect, $_POST['yname']);
$lname = mysqli_real_escape_string($connect, $_POST['email']);
$filename = $_FILES['uploadfile']['name'];
$filetmpname = $_FILES['uploadfile']['tmp_name'];
$folder = 'imagesuploadedf/';
// edited and added below code. it will check if folder exists and create if not exists.....
$foldername = 'imagesuploadedf';
if ( ! is_dir($foldername)) {
    mkdir($foldername);
}
// end of edited and added code
move_uploaded_file($filetmpname, $folder.$filename);
// $sql = "INSERT INTO `uploadedimage` (`imagename`)  VALUES ('$filename')";
// connect to mysql database using mysqli
$sql = "INSERT INTO `tabela`(`name`, `email`, `imagename`) VALUES (?, ?, ?)";    
$stmt = mysqli_stmt_init($connect);
if(!mysqli_stmt_prepare($stmt, $sql)){
    echo "Error";
} else{
    mysqli_stmt_bind_param($stmt, "sss", $fname, $lname, $filename);
    mysqli_stmt_execute($stmt);
}
mysqli_close($connect);
}

Answer 1

要将图像保存到数据库，您必须将它们转换为dataurl格式，这将使您的数据库大小。您可以尝试将数据保存到本地或服务器，然后将其名称保存到数据并从那里调用它

if (!empty($_FILES['image']['name'])) {
    $imgFile = $_FILES['image']['name'];
    $tmp_dir = $_FILES['image']['tmp_name'];
    $imgSize = $_FILES['image']['size'];
    $imgExt = strtolower(pathinfo($imgFile, PATHINFO_EXTENSION));
    $upload_dir = $folder.$filename;
    $filename = rand(1000, 1000000) . "." . $imgExt;
    $valid_extensions = array('jpeg', 'jpg', 'png', 'gif');
    if (in_array($imgExt, $valid_extensions)) {
        if ($imgSize < 5000000) {
            move_uploaded_file($tmp_dir, $upload_dir . $filename);
        } else {
            $error = 'Image is too large';
        }
    } else {
        $error = 'Please choose image of valid extension';
    }
} else {
    $error = 'Upload image';
}

上面是将图像保存到本地或服务器的代码。现在，将图像名称包含在数据库查询中。我希望这有帮助。