lacus / cpf-val
Utility function to validate CPF (Brazilian personal ID)
Requires
- php: >=8.1
- lacus/cpf-gen: ^1.0
Requires (Dev)
- phpunit/phpunit: ^10.5
- spatie/phpunit-watcher: ~1.24
This package is auto-updated.
Last update: 2025-09-23 05:04:30 UTC
README
Utility function/class to validate CPF (Brazilian personal ID).
PHP Support
Passing ✔ | Passing ✔ | Passing ✔ |
Installation
# using Composer
$ composer require lacus/cpf-val
Import
<?php // Using class-based resource use Lacus\CpfVal\CpfValidator; // Or using function-based one use function Lacus\CpfVal\cpf_val;
Usage
Object-Oriented Usage
$validator = new CpfValidator(); $cpf = '11144477735'; echo $validator->isValid($cpf) ? 'Valid' : 'Invalid'; // returns 'Valid' $cpf = '111.444.777-35'; echo $validator->isValid($cpf) ? 'Valid' : 'Invalid'; // returns 'Valid' $cpf = '11144477736'; echo $validator->isValid($cpf) ? 'Valid' : 'Invalid'; // returns 'Invalid'
Imperative programming
The helper function cpf_val()
is just a functional abstraction. Internally it creates an instance of CpfValidator
and calls the isValid()
method right away.
$cpf = '11144477735'; echo cpf_val($cpf) ? 'Valid' : 'Invalid'; // returns 'Valid' echo cpf_val('111.444.777-35') ? 'Valid' : 'Invalid'; // returns 'Valid' echo cpf_val('11144477736') ? 'Valid' : 'Invalid'; // returns 'Invalid'
Validation Examples
// Valid CPF numbers cpf_val('11144477735') // returns true cpf_val('111.444.777-35') // returns true cpf_val('12345678909') // returns true // Invalid CPF numbers cpf_val('11144477736') // returns false cpf_val('12345678901') // returns false cpf_val('00000000000') // returns false cpf_val('11111111111') // returns false cpf_val('123') // returns false (too short) cpf_val('') // returns false (empty)
Features
- ✅ Format Agnostic: Accepts CPF with or without formatting (dots, dashes)
- ✅ Strict Validation: Validates both check digits according to Brazilian CPF algorithm
- ✅ Type Safety: Built with PHP 8.1+ strict types
- ✅ Lightweight: Minimal dependencies, only requires
lacus/cpf-gen
for check digit calculation - ✅ Dual API: Both object-oriented and functional programming styles supported
API Reference
CpfValidator Class
isValid(string $cpfString): bool
Validates a CPF string and returns true
if valid, false
otherwise.
Parameters:
$cpfString
(string): The CPF to validate (with or without formatting)
Returns:
bool
:true
if the CPF is valid,false
otherwise
cpf_val() Function
cpf_val(string $cpfString): bool
Functional wrapper around CpfValidator::isValid()
.
Parameters:
$cpfString
(string): The CPF to validate (with or without formatting)
Returns:
bool
:true
if the CPF is valid,false
otherwise
Validation Algorithm
The package validates CPF using the official Brazilian algorithm:
- Length Check: Ensures the CPF has exactly 11 digits
- First Check Digit: Calculates and validates the 10th digit
- Second Check Digit: Calculates and validates the 11th digit
- Format Tolerance: Automatically strips non-numeric characters before validation
Error Handling
The validator is designed to be forgiving with input format but strict with validation:
- Invalid formats (too short, too long) return
false
- Invalid check digits return
false
- Empty strings return
false
- Non-numeric strings (after stripping formatting) return
false
Dependencies
- PHP: >= 8.1
- lacus/cpf-gen: ^1.0 (for check digit calculation)
Contribution & Support
We welcome contributions! Please see our Contributing Guidelines for details. But if you find this project helpful, please consider:
- ⭐ Starring the repository
- 🤝 Contributing to the codebase
- 💡 Suggesting new features
- 🐛 Reporting bugs
License
This project is licensed under the MIT License - see the LICENSE file for details.
Changelog
See CHANGELOG for a list of changes and version history.
Made with ❤️ by Lacus Solutions