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<?php |
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namespace NFePHP\Common; |
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/** |
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* Class to create and validate the identification keys of electronic documents |
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* from SPED |
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* NT 2018.001 Emitente com CPF e IE |
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* @category NFePHP |
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* @package NFePHP\Common\Keys |
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* @copyright Copyright (c) 2008-2018 |
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* @license http://www.gnu.org/licenses/lesser.html LGPL v3 |
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* @author Roberto L. Machado <linux dot rlm at gmail dot com> |
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* @link http://github.com/nfephp-org/sped-common for the canonical source repository |
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*/ |
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class Keys |
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{ |
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/** |
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* Build 44 digits keys to NFe, NFCe, CTe and MDFe |
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* @param string $cUF UF number |
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* @param string $ano year |
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* @param string $mes month |
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* @param string $cnpj or CPF |
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* @param string $mod model of document 55, 65, 57 etc |
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* @param string $serie |
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* @param string $numero document number |
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* @param string $tpEmis emission type |
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* @param string $codigo random number or document number |
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* @return string |
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*/ |
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public static function build( |
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$cUF, |
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$ano, |
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$mes, |
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$cnpj, |
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$mod, |
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$serie, |
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$numero, |
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$tpEmis, |
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$codigo = null |
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) { |
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if (empty($codigo)) { |
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$codigo = self::random(); |
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} |
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//if a cpf with 11 digits is passed then complete with leading zeros |
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//up to the 14 digits |
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if (strlen($cnpj) < 14) { |
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$cnpj = str_pad($cnpj, 14, '0', STR_PAD_LEFT); |
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} |
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$format = "%02d%02d%02d%s%02d%03d%09d%01d%08d"; |
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$key = sprintf( |
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$format, |
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$cUF, |
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$ano, |
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$mes, |
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$cnpj, |
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$mod, |
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$serie, |
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$numero, |
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$tpEmis, |
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$codigo |
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); |
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return $key . self::verifyingDigit($key); |
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} |
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/** |
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* Verifies that the key provided is valid |
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* @param string $key |
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* @return boolean |
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*/ |
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public static function isValid($key) |
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{ |
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if (strlen($key) != 44) { |
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return false; |
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} |
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$cDV = substr($key, -1); |
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$calcDV = self::verifyingDigit(substr($key, 0, 43)); |
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if ($cDV === $calcDV) { |
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return true; |
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} |
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return false; |
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} |
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/** |
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* This method calculates verifying digit |
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* @param string $key |
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* @return string |
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*/ |
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public static function verifyingDigit($key) |
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{ |
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if (strlen($key) != 43) { |
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return ''; |
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} |
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$multipliers = [2, 3, 4, 5, 6, 7, 8, 9]; |
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$iCount = 42; |
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$weightedSum = 0; |
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while ($iCount >= 0) { |
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for ($mCount = 0; $mCount < 8 && $iCount >= 0; $mCount++) { |
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$weightedSum += (substr($key, $iCount, 1) * $multipliers[$mCount]); |
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$iCount--; |
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} |
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} |
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$vdigit = 11 - ($weightedSum % 11); |
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if ($vdigit > 9) { |
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$vdigit = 0; |
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} |
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return (string) $vdigit; |
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} |
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/** |
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* Generate and return a 8 digits random number |
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* for cNF tag |
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* @param string|null $nnf |
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* @return string |
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*/ |
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public static function random($nnf = null) |
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{ |
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$loop = true; |
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while ($loop) { |
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$cnf = str_pad(mt_rand(0, 99999999), 8, '0', STR_PAD_LEFT); |
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$loop = !self::cNFIsValid($cnf); |
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if (!empty($nnf)) { |
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if (intval($cnf) === intval($nnf)) { |
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$loop = true; |
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} |
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} |
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} |
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return $cnf; |
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} |
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/** |
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* Verify if cNF number is valid NT2019.001 |
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* @param string $cnf |
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*/ |
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public static function cNFIsValid($cnf) |
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{ |
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$defs = [ |
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'00000000', '11111111', '22222222', '33333333', '44444444', |
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'55555555', '66666666', '77777777', '88888888', '99999999', |
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'12345678', '23456789', '34567890', '45678901', '56789012', |
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'67890123', '78901234', '89012345', '90123456', '01234567' |
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]; |
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return !in_array($cnf, $defs); |
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} |
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} |
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nfephp-org /
sped-common
If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: