I have this validation:
'users.first_name' => 'required|min:2|regex:/[A-Za-z. -]/|max:255',
Why this validation pass this name: John[][]
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Sebastian Corneliu Vîrlan
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1Please give us a [mcve] so we can reproduce your problem – Rizier123 May 12 '16 at 07:33
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@lonVasile What you need to allow in `first_name`?? – Jenson M John May 12 '16 at 07:35
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Any letter, dot and dash. – Sebastian Corneliu Vîrlan May 12 '16 at 07:35
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Try `'users.first_name' => 'required|regex:/^[A-Za-z. -]{2,255}$/'` – Wiktor Stribiżew May 12 '16 at 07:37
2 Answers
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Someone in comments also pointed to this issue that by /[A-Za-z. -]/ you don't care about all characters but saying that's enough for me if field under validation has only the least of that characters.
To have only those characters you should specify beginning and ending of the input text by using a caret ^ and $:
regex:/^[A-Za-z. -]+$/
revo
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2Thanks for this answer. I had similar requirements for a username minus allowing the space character and I needed to allow numbers. So all usernames can have numbers, letters a-z both upper and lowercase, underscores, dots and dashes. This works for Laravel 5.4, here's the end result : `'username' => ['required', 'regex:/^[0-9A-Za-z.\-_]+$/', 'max:150'],` – racl101 May 15 '17 at 22:56
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Thank you @racl101. It still works on Laravel 7. In my case I declared a `Rule` class and used your regex there. Also I considered appropriate adding `'min:3'`. – JCarlosR Sep 10 '20 at 23:05
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'users.first_name' => 'required|min:2|alpha_dash|max:255',
Abhishek
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1*`alpha_dash` - The field under validation may have alpha-numeric characters, as well as dashes and underscores.* - What about a dot and space? – Wiktor Stribiżew May 12 '16 at 07:38
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Oh! my bad. didn't see the . dot. Btw I don't know why first name will include a dot. – Abhishek May 12 '16 at 07:39
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alpha_dash is also allowing numerics, which first name probably don't use either. :) – Robin Feb 25 '20 at 14:12