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Validação de dados - Brasil
function valida_cpf($cpf) {if (empty($cpf)) {return false; } $cpf = preg_replace("/[^0-9]/", "", $cpf); for ($i = 0; $i <= 9; $i++) {if (str_repeat($i, 11) == $cpf) {return false; } } for ($t = 9; $t < 11; $t++) {for ($d = 0, $c = 0; $c < $t; $c++) {$d += $cpf{$c} * (($t + 1) - $c); } $d = ((10 * $d) % 11) % 10; if ($cpf{$c} != $d) {return false; } } return true; }
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