Libraries tagged by Check digit

The Filament CNPJ Field is a custom input component for Brazilian company registrations (CNPJ), including the new alphanumeric format. It handles CNPJ formatting, check digit validation and automatic company lookup through the Minha Receita API.

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Cria e valida check digit para nif

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Validates ean13 check digit

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IBAN Validator checks an IBAN's mod-97 checksum, its length and format for the country, and national check digits where the country defines them. It returns whether the IBAN is valid, the country and the reasons it fails. Paid plans add the bank code, branch code and account number, the correct check digits and the SEPA flag.

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Tax ID Validator checks US tax identification numbers including SSNs, EINs, and ITINs for structural validity. It accepts formatted or unformatted strings and returns validation results, normalized formatting, masked numbers, and the last four digits.

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ISBN Validator checks ISBN-10 and ISBN-13 numbers for valid checksums and parses their registration group, publisher, and title parts. Pass any raw book identifier with or without hyphens to inspect normalized digits, format type, and specific rejection reasons.

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Provides an easy way to spellcheck multiple text source by many spellcheckers, directly from PHP

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