move_uploaded_file() php 函数不适用于多次上传

Posted 2023-03-22

【中文标题】move_uploaded_file() php 函数不适用于多次上传

【英文标题】：move_uploaded_file() php function not working for multiple uploads

【发布时间】：2021-08-05 22:03:38

【问题描述】：

我正在尝试上传 3 个单独的图像以上传到服务器上使用。该代码不会引发任何错误，但只会上传第一张图片。其他两张图片没有上传到服务器，但它的名字被插入到数据库中。

这是我上传图片的代码：

    <?php
include("common_code.php");
include("database_connection.php");

$property_id = $_POST['id'];
if (!$_FILES['file1']['size'] == 0) 
    $temp = explode(".", $_FILES["file1"]["name"]);
    $extension = end($temp);
    $fileName1= mt_rand(). "_". time(). "." .$extension;
    $image_tmp_name = $_FILES['file1']['tmp_name'];
    $folder = "images/property_images/";
    $folder = $folder . $fileName1;
    move_uploaded_file($image_tmp_name, $folder);
    $uploadQuery = "INSERT INTO property_photos (filenames,property_id) VALUES ('$folder','$property_id')";
    $run = mysqli_query($connection, $uploadQuery);


if (!$_FILES['file2']['size'] == 0) 
    $temp2 = explode(".", $_FILES["file2"]["name"]);
    $extension2 = end($temp2);
    $fileName2= mt_rand(). "_". time(). "." .$extension2;
    $image_tmp_name = $_FILES['file2']['tmp_name'];
    $folder2 = "images/property_images/";
    $folder2 = $folder2 . $fileName2;
    move_uploaded_file($image_tmp_name2, $folder2);
    $uploadQuery2 = "INSERT INTO property_photos (filenames,property_id) VALUES ('$folder2','$property_id')";
    $run2 = mysqli_query($connection, $uploadQuery2);


if (!$_FILES['file3']['size'] == 0) 
    $temp3 = explode(".", $_FILES["file3"]["name"]);
    $extension3 = end($temp3);
    $fileName3= mt_rand(). "_". time(). "." .$extension3;
    $image_tmp_name = $_FILES['file3']['tmp_name'];
    $folder3 = "images/property_images/";
    $folder3 = $folder3 . $fileName3;
    move_uploaded_file($image_tmp_name3, $folder3);
    $uploadQuery3 = "INSERT INTO property_photos (filenames,property_id) VALUES ('$folder3','$property_id')";
    $run3 = mysqli_query($connection, $uploadQuery3);


header("Location:property_reg_successful.php?id=$property_id");

只有 file1 被上传到服务器！ 文件 2 和文件 3 未上传。

【问题讨论】：

这感觉就像一个循环可以代替。 move_uploaded_file 在失败时返回 false，请务必检查，并 echo 输出值，以便您可以看到最终的字符串

好建议@Chris Haas，循环是对这段代码的明确改进，有助于避免像这样的琐碎的复制和粘贴错误。

【参考方案1】：

您刚刚遇到了一个简单的变量命名错误：

$image_tmp_name = $_FILES['file2']['tmp_name'];

[...]

move_uploaded_file($image_tmp_name2, $folder2);

注意不同的变量名“$image_tmp_name”和“$image_tmp_name2”。