Laravel Input Validation Rules

Rule	Description	Laravel Example	Sample Input
required	Field must not be empty	'name' => 'required'	'John'
string	Must be a string	'bio' => 'string'	'Hello World'
min	Minimum length (string) or value (number)	'password' => 'min:8'	'MySecurePwd'
max	Maximum length (string) or value (number)	'username' => 'max:20'	'Alpha123'
between	Value length or number range	'age' => 'between:18,60'	25
email	Must be a valid email	'email' => 'email'	'user@example.com'
regex	Must match regex pattern	'username' => 'regex:/^[a-zA-Z0-9]+$/'	'Alpha123'
boolean	Must be true/false or 0/1	'active' => 'boolean'	true
in	Must be in allowed list	'role' => 'in:admin,user'	'admin'
not_in	Must NOT be in given list	'status' => 'not_in:banned,blocked'	'active'
digits	Must be digits only with exact length	'pin' => 'digits:6'	'123456'
numeric	Must be a number	'price' => 'numeric'	100
integer	Must be an integer	'count' => 'integer'	42
confirmed	Must match another field (`password_confirmation`)	'password' => 'confirmed'	'secret123' + 'secret123'
same	Must be identical to another field	'password' => 'same:confirm_password'	'secret123'
date	Must be valid date	'dob' => 'date'	'2025-08-28'
after	Date must be after given date	'end_date' => 'after:start_date'	'2025-09-01'
before	Date must be before given date	'start_date' => 'before:end_date'	'2025-08-20'
image	Must be an image file	'photo' => 'image'	'image.png'
mimes	Allowed file types	'file' => 'mimes:pdf,docx,jpg,png'	report.pdf
unique	Must be unique in DB column	'email' => 'unique:users,email'	'new@example.com'
exists	Must exist in DB column	'user_id' => 'exists:users,id'	5

Example Laravel Validation

$request->validate([
  'name'   => 'required|string|max:50',
  'email'  => 'required|email|unique:users,email',
  'password' => 'required|min:8|confirmed',
  'age'   => 'required|integer|between:18,60',
  'username' => 'required|regex:/^[a-zA-Z0-9]+$/',
  'role'   => 'required|in:admin,user',
  'photo'  => 'nullable|image|mimes:jpg,png|max:2048',
]);

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