Validate only alphanumeric characters in Laravel

2019-03-20 14:54发布

I have the following code in my Laravel 5 app:

public function store(Request $request){
    $this->validate($request, ['filename' => 'regex:[a-zA-Z0-9_\-]']);
}

My intentions are to permit filenames with only alphanumeric characters, dashes and underscores within them. However, my regex is not working, it fails even on a single letter. What am I doing wrong?

4条回答
不美不萌又怎样
2楼-- · 2019-03-20 15:16

Might be easiest to use the built in alpha-numeric validation:

https://laravel.com/docs/5.2/validation#rule-alpha-num

$validator = Validator::make($request->all(), [
    'filename' => 'alpha_num',
]);
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太酷不给撩
3楼-- · 2019-03-20 15:20

use laravel rule,

    public function store(Request $request){
    $this->validate($request, ['filename' => 'alpha_dash']);
}

Laravel validation rule for alpha numeric,dashes and undescore

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老娘就宠你
4楼-- · 2019-03-20 15:26

You need to make sure the pattern matches the whole input string. Also, the alphanumeric and an underscore symbols can be matched with \w, so the regex itself can be considerably shortened.

I suggest:

'regex:/^[\w-]*$/'

Details:

  • ^ - start of string
  • [\w-]* - zero or more word chars from the [a-zA-Z0-9_] range or -s
  • $ - end of string.

Why is it better than 'alpha_dash': you can further customize this pattern.

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\"骚年 ilove
5楼-- · 2019-03-20 15:26

You forgot to quantify the regex, it also wasn't quite properly formed.

public function store(Request $request){
    $this->validate($request, ['filename' => 'regex:/^[a-zA-Z0-9_\-]*$/']);
}

This will accept empty filenames; if you want to accept non-empty only change the * to +.

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