仅验证Laravel中的字母数字字符 [英] Validate only alphanumeric characters in Laravel

问题描述

我的Laravel 5应用程序中包含以下代码:

I have the following code in my Laravel 5 app:

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

我的意图是允许文件名中仅包含字母数字字符，破折号和下划线.但是，我的正则表达式无法正常工作，即使是一个字母也无法正常工作.我在做什么错了?

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?

推荐答案

您需要确保模式与整个输入字符串匹配.另外，字母数字和下划线符号可以与\w匹配，因此正则表达式本身可以大大缩短.

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.

我建议:

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

详细信息:

• ^-字符串开头
• [\w-]*-零个或多个来自[a-zA-Z0-9_]范围或- s
的单词字符
• $-字符串结尾.

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

为什么比'alpha_dash' 好:您可以进一步自定义此模式.

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

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