Invalid alpha validation.

[hmingv]

• Laravel Version: 9.x

Description:

https://laravel.com/docs/9.x/validation#rule-alpha

May I ask alphabetic characters. Does the meaning of this sentence include other languages, or is it just 26 English letters?

Steps To Reproduce:

Use alpha for form validation, enter Chinese, the validation rule will pass

[hmingv]

This issue is related to this validation rule preg_match('/^[\pL\pM]+$/u', $value);

In src/Illuminate/Validation/Concerns/ValidatesAttributes.php file line 317

[joelclermont]

This regex is using Unicode character properties. It is many, many more characters than A-Z.

If you want something more restrictive, you could use the regex rule with exactly which ranges of letters you want to allow.

[hmingv]

Thanks @joelclermont

I know this regex match is a Unicode character. But I am confused about this document. My understanding of the document description is that it will verify whether it is an English letter, not a Unicode character.

alpha
The field under validation must be entirely alphabetic characters.