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<?php |
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namespace IMEI; |
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class imei |
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{ |
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public function is_luhn($n) |
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{ |
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$str = ''; |
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foreach (str_split(strrev((string) $n)) as $i => $d) { |
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$str .= 0 !== $i % 2 ? $d * 2 : $d; |
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} |
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14
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return 0 === array_sum(str_split($str)) % 10; |
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} |
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public function is_imei2($n) |
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{ |
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return $this->is_luhn($n) && 15 == strlen($n); |
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} |
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public function is_imei($imei) |
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{ |
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// Should be 15 digits |
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if (15 != strlen($imei) || !ctype_digit($imei)) { |
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return false; |
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} |
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// Get digits |
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$digits = str_split($imei); |
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// Remove last digit, and store it |
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$imei_last = array_pop($digits); |
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// Create log |
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$log = []; |
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// Loop through digits |
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foreach ($digits as $key => $n) { |
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// If key is odd, then count is even |
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if ($key & 1) { |
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// Get double digits |
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$double = str_split($n * 2); |
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// Sum double digits |
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$n = array_sum($double); |
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} |
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// Append log |
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$log[] = $n; |
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} |
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// Sum log & multiply by 9 |
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$sum = array_sum($log) * 9; |
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// Compare the last digit with $imei_last |
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return substr($sum, -1) == $imei_last; |
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} |
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/** |
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* Generates IMEI code valid and random |
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* Generates 14 aleatory digits. These 14, multiplies the multiples of 2 by 2 and sum the result |
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* The result Must be divisible by 10, |
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* Then get the diference and genaretes the last digit. |
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* |
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* @return int $imei |
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*/ |
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public static function rand_imei() |
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{ |
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$code = self::intRandom(14); |
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$position = 0; |
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$total = 0; |
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while ($position < 14) { |
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if (0 == $position % 2) { |
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$prod = 1; |
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} else { |
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$prod = 2; |
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} |
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$actualNum = $prod * $code[$position]; |
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if ($actualNum > 9) { |
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$strNum = strval($actualNum); |
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$total += $strNum[0] + $strNum[1]; |
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} else { |
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$total += $actualNum; |
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} |
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++$position; |
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} |
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$last = 10 - ($total % 10); |
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if (10 == $last) { |
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$imei = $code . 0; |
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} else { |
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$imei = $code . $last; |
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} |
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if (strlen($imei) < 15) { |
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$digits = 15 - strlen($imei); |
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$imei .= rand(pow(10, $digits - 1), pow(10, $digits) - 1); |
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} else { |
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$imei = substr($imei, 0, 15); |
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} |
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return $imei; |
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} |
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/** |
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* @param int $size |
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* |
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* @return $int |
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*/ |
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public static function intRandom($size) |
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{ |
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$validCharacters = utf8_decode('0123456789'); |
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$validCharNumber = strlen($validCharacters); |
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$int = ''; |
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while (strlen($int) < $size) { |
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$index = mt_rand(0, $validCharNumber - 1); |
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$int .= $validCharacters[$index]; |
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} |
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return $int; |
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} |
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} |
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dimaslanjaka /
universal-framework
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