上传后用随机字符串重命名文件并将名称存储在数组中

Question

我正在尝试使用 foreach 处理多个文件上传，然后使用随机字符串重命名文件并将文件名存储在数组中，这是我当前的代码：

    // this variable stores the id of last inserted row in MySQLi DB
    $last_shipment_id = mysqli_insert_id($con);
    // Array of valid file formats
    $valid_formats = array("jpg", "jpeg", "png");
    // the upload path
    $path = "../uploads/"; // Upload directory
    // count variable for foreach counting
    $count = 0;
    // variable for generated file names to use them later
    $new_file_name = array();


    foreach ($_FILES['files']['name'] as $f => $name) {
        $ext = pathinfo($name, PATHINFO_EXTENSION);
        $new_file_name[] = randomNumber(14)."-".$last_shipment_id.'.'.$ext;

        if ($_FILES['files']['error'][$f] == 4) {
            continue;
        }          
        if ($_FILES['files']['error'][$f] == 0) {              
            if( ! in_array(pathinfo($name, PATHINFO_EXTENSION), $valid_formats) ){
                $message[] = "$name is not a valid format";
                continue;
            } else {
                if(move_uploaded_file($_FILES["files"]["tmp_name"][$f], $path.$new_file_name)) {

                }
            }    
        }
    }

我找不到问题出在哪里，我应该为每个生成的文件名使用 foreach 然后在 foreach 中使用 move_uploaded_file 吗？

Answer 1

你完全错了。您已在 foreach 语句中初始化 $_FILES['files']['name'] 并尝试在每次迭代中访问 $_FILES['files']['error'] 和 $_FILES["files"]["tmp_name"]。因为这是一个数组，所以不可能。

所以解决方法如下，

foreach($_FILES as $key=>$row){
   $ext = pathinfo($row[$key]['files']['name'], PATHINFO_EXTENSION);
   $new_file = randomNumber(14)."-".$last_shipment_id.'.'.$ext;
    array_push($new_file_name,$new_file);
    if ($row[$key]['files']['error'] == 4) {
        continue;
    }          
    if ($row[$key]['files']['error'] == 0) {              
        if( ! in_array($ext,  $valid_formats) ){
           $error_msg = "The file ". $new_file. " is not a valid format";
           array_push($message, $error_msg); 
            continue;
        } else {
            if(move_uploaded_file($row[$key]["files"]["tmp_name"], $path.$new_file_name[$key])) {

            }
        }    
    }
}

希望对您有所帮助。

上传后用随机字符串重命名文件并将名称存储在数组中

Renaming files with random string after upload and storing the name in array

php

file-upload

multifile-uploader