Question

使用PHP重命名多个文件，它工作正常，但我需要将文件只保存为文件名的随机数

但在我的情况下，我得到随机数+文件名

当我删除文件名时，保存的图像没有extension

我只需要保存带有重命名名称的文件，我需要删除文件名并使用随机数保存我使用此方法生成随机数$newname = md5(rand() * time());

这里是重命名部分move_uploaded_file($file_tmp, "$desired_dir/" . $newname . $file_name);当我删除$file_name时，保存的输出文件没有扩展名

这里是我的代码

<?php

$db_username = 'sanoj';
$db_password = '123456';
if (isset($_FILES['files'])) {
    $errors = array();
    foreach ($_FILES['files']['tmp_name'] as $key => $tmp_name) {
        $finfo = pathinfo($_FILES['files']['name'][$key]);
        $extension = '';
        if (!empty($finfo[PATHINFO_EXTENSION])) {
            $extension = "." . $finfo[PATHINFO_EXTENSION];
        }
        $file_name = md5(rand() * time()) . "." . $extension;

        $file_size = $_FILES['files']['size'][$key];
        $file_tmp = $_FILES['files']['tmp_name'][$key];
        $file_type = $_FILES['files']['type'][$key];
        if ($file_size > 2097152000) {
            $errors[] = 'File size must be less than 2 MB';
        }
        $desired_dir = "user_data/";
        if (empty($errors) == true) {
            if (is_dir($desired_dir) == false) {
                mkdir("$desired_dir", 0700);        // Create directory if it does not exist
            }
            if (is_dir("$desired_dir/" . $file_name) == false) {
                move_uploaded_file($file_tmp, "$desired_dir/" .  $file_name);
            } else {                                  // rename the file if another one exist
                $new_dir = "$desired_dir/" ;
                rename($file_tmp, $new_dir);
            }
        } else {
            print_r($errors);
        }
    }

重要以上代码适用于多张图片上传

Answer 1

$extension = end(explode('.', $_FILES['image']['name'])); 
move_uploaded_file($file_tmp, "$desired_dir/" . $newname.".".$extension);

请尝试此而不是

 move_uploaded_file($file_tmp, "$desired_dir/" . $newname . $file_name);

Answer 2

获取文件的扩展名，检查，是否有扩展名，如果是，则附加到它，创建随机数，并将数字与扩展名合并：

$finfo = pathinfo($_FILES['files']['name'][$key]);
$extension = '';
if (!empty($finfo[PATHINFO_EXTENSION])) {
    $extension = "." . $finfo[PATHINFO_EXTENSION];
}
$file_name = md5(rand() * time()) . "." . $extension;

Answer 3

试试这个

$valid_formats = array("jpg", "png", "gif", "zip", "bmp");
$max_file_size = 1024*100; //100 kb
$path = "uploads/"; // Upload directory
$count = 0;

if(isset($_POST) and $_SERVER['REQUEST_METHOD'] == "POST"){
    // Loop $_FILES to exeicute all files
    foreach ($_FILES['files']['name'] as $f => $name) {     
        if ($_FILES['files']['error'][$f] == 4) {
            continue; // Skip file if any error found
        }          
        if ($_FILES['files']['error'][$f] == 0) {              
            if ($_FILES['files']['size'][$f] > $max_file_size) {
                $message[] = "$name is too large!.";
                continue; // Skip large files
            }
            elseif( ! in_array(pathinfo($name, PATHINFO_EXTENSION), $valid_formats) ){
                $message[] = "$name is not a valid format";
                continue; // Skip invalid file formats
            }
            else{ // No error found! Move uploaded files 
                if(move_uploaded_file($_FILES["files"]["tmp_name"][$f], $path.$name))
                $count++; // Number of successfully uploaded file
            }
        }
    }
}

多文件重命名错误

3 个答案: