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Validar CPF (PHP)
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<?php | |
function validar_cpf($cpf) | |
{ | |
// Limpa caracteres e mantem apenas dígitos | |
$cpf = preg_replace('/[^0-9]/', '', (string) $cpf); | |
// Valida tamanho | |
if (strlen($cpf) != 11) | |
return false; | |
// Verifica se todos os digitos são iguais | |
if (preg_match('/(\d)\1{10}/', $cpf)) | |
return false; | |
// Calcula e confere primeiro dígito verificador | |
for ($i = 0, $j = 10, $soma = 0; $i < 9; $i++, $j--) | |
$soma += $cpf[$i] * $j; | |
$resto = $soma % 11; | |
if ($cpf[9] != ($resto < 2 ? 0 : 11 - $resto)) | |
return false; | |
// Calcula e confere segundo dígito verificador | |
for ($i = 0, $j = 11, $soma = 0; $i < 10; $i++, $j--) | |
$soma += $cpf[$i] * $j; | |
$resto = $soma % 11; | |
return $cpf[10] == ($resto < 2 ? 0 : 11 - $resto); | |
} | |
var_dump(validar_cpf('111.444.777-35')); |
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