function br_tax_number_cpf_validator in Brazilian IDs 7

Function to validate if value is a cpf

Parameters

string $value:

Return value

array TRUE or FALSE and MSG error

1 call to br_tax_number_cpf_validator()

br_tax_number_fields_cpf_validate in ./br_tax_number_fields.module

Validation callback.

File

./br_tax_number_fields.module, line 220

Adds Brazilian Tax Number field widgets to text field type at the Field UI and creates new form element types for use in the Form API.

Code

function br_tax_number_cpf_validator($value) {
  if (!empty($value)) {
    $forbidden = array(
      '00000000000',
      '11111111111',
      '22222222222',
      '33333333333',
      '44444444444',
      '55555555555',
      '66666666666',
      '77777777777',
      '88888888888',
      '99999999999',
    );
    if (in_array($value, $forbidden)) {
      return array(
        'status' => FALSE,
        'msg' => t('CPF field does not allow a sequence of the same number.'),
      );
    }
    if (strlen($value) != 11) {
      return array(
        'status' => FALSE,
        'msg' => t('CPF must have 11 digits.'),
      );
    }
    else {

      // @TODO - Translate variables to english
      $cpf_validar = substr($value, 0, 9);
      $soma = 0;
      $n = 11;
      for ($i = 0; $i <= 9; $i++) {
        $n = $n - 1;
        $soma = $soma + substr($cpf_validar, $i, 1) * $n;
      }
      $resto = $soma % 11;
      if ($resto < 2) {
        $cpf_validar .= 0;
      }
      else {
        $cpf_validar = $cpf_validar . (11 - $resto);
      }

      // Segunda parte da validação do CPF.
      $soma = 0;
      $n = 12;
      for ($i = 0; $i <= 10; $i++) {
        $n = $n - 1;
        $soma = $soma + substr($cpf_validar, $i, 1) * $n;
      }
      $resto = $soma % 11;
      if ($resto < 2) {
        $cpf_validar .= 0;
      }
      else {
        $cpf_validar = $cpf_validar . (11 - $resto);
      }
      if ($cpf_validar != $value) {
        return array(
          'status' => FALSE,
          'msg' => t('CPF number you have entered is invalid.'),
        );
      }
    }
  }
  return array(
    'status' => TRUE,
  );
}