php 如何验证 Laravel 中的最大文件大小？
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How to Validate on Max File Size in Laravel?
提问by Jim Peeters
I'm trying to validate on a max file size of 500kb in Laravel:
我正在尝试在 Laravel 中验证最大 500kb 的文件大小：
$validator = Validator::make($request->all(), [
'file' => 'size:500',
]);
But this says that the file should be exactly 500kb big. How can I edit this rule so that it returns an error when it's bigger than 500kb?
但这表示该文件应该正好是 500kb 大。如何编辑此规则，使其在大于 500kb 时返回错误？
Ive tried this:
我试过这个：
'file' => 'size:>=500'
'file' => 'size:max:500'
The documentation says nothing about this:
文档没有说明这一点：
size:value
The field under validation must have a size matching the given value. For string data, the value corresponds to the number of characters. For numeric data, the value corresponds to a given integer value. For files, size corresponds to the file size in kilobytes.
大小：值
验证字段的大小必须与给定值匹配。对于字符串数据，该值对应于字符数。对于数值数据，该值对应于给定的整数值。对于文件，大小对应于以千字节为单位的文件大小。
回答by Filip Koblański
According to the documentation:
根据文档：
$validator = Validator::make($request->all(), [
'file' => 'max:500000',
]);
The value is in kilobytes. I.e. max:10240= max 10 MB.
该值以千字节为单位。即max:10240= 最大 10 MB。
回答by NULL pointer
Edit: Warning! This answer worked on my XAMPP OsX environment, but when I deployed it to AWS EC2 it did NOT prevent the upload attempt.
编辑：警告！这个答案适用于我的 XAMPP OsX 环境，但是当我将它部署到 AWS EC2 时，它并没有阻止上传尝试。
I was tempted to delete this answer as it is WRONG But instead I will explain what tripped me up
我很想删除这个答案，因为它是错误的但相反，我会解释是什么让我绊倒了
My file upload field is named 'upload' so I was getting "The upload failed to upload.". This message comes from this line in validation.php:
我的文件上传字段被命名为“上传”，所以我收到“上传失败上传。”。此消息来自validation.php 中的这一行：
in resources/lang/en/validaton.php:
在 resources/lang/en/validaton.php 中：
'uploaded' => 'The :attribute failed to upload.',
'uploaded' => 'The :attribute failed to upload.',
And this is the message displayed when the file is larger than the limit set by PHP.
这是文件大于 PHP 设置的限制时显示的消息。
I want to over-ride this message, which you normally can do by passing a third parameter $messages array to Validator::make() method.
我想覆盖此消息，您通常可以通过将第三个参数 $messages 数组传递给 Validator::make() 方法来实现。
HoweverI can't do that as I am calling the POST from a React Component, which renders the form containing the csrf field and the upload field.
但是我不能这样做，因为我从 React 组件调用 POST，它呈现包含 csrf 字段和上传字段的表单。
So instead, as a super-dodgy-hack, I chose to get into my view that displays the messages and replace that specific message with my friendly 'file too large' message.
因此，作为一个超级狡猾的黑客，我选择进入显示消息的视图，并将该特定消息替换为我友好的“文件太大”消息。
Here is what works if the file to smaller than the PHP file size limit:
如果文件小于 PHP 文件大小限制，以下是有效的方法：
In case anyone else is using Laravel FormRequest class, here is what worked for me on Laravel 5.7:
如果其他人正在使用 Laravel FormRequest 类，以下是在 Laravel 5.7 上对我有用的内容：
This is how I set a custom error message and maximum file size:
这是我设置自定义错误消息和最大文件大小的方式：
I have an input field <input type="file" name="upload">. Note the CSRF token is required also in the form (google laravel csrf_field for what this means).
我有一个输入字段<input type="file" name="upload">。请注意，表单中也需要 CSRF 令牌（google laravel csrf_field 这意味着什么）。
<?php
namespace App\Http\Requests;
use Illuminate\Foundation\Http\FormRequest;
class Upload extends FormRequest
{
...
...
public function rules() {
return [
'upload' => 'required|file|max:8192',
];
}
public function messages()
{
return [
'upload.required' => "You must use the 'Choose file' button to select which file you wish to upload",
'upload.max' => "Maximum file size to upload is 8MB (8192 KB). If you are uploading a photo, try to reduce its resolution to make it under 8MB"
];
}
}
