Created
July 16, 2020 16:31
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<?php | |
class EAN13 { | |
private $code = null; | |
private $prefix = false; | |
public function __construct ($prefix = false) { | |
$this->prefix = $prefix === false ? false : (string) $prefix; | |
} | |
public static function create($prefix = false) { | |
$barcode = new static($prefix); | |
return $barcode->generate(); | |
} | |
public function generate() | |
{ | |
// Generate random | |
$this->code = (string) mt_rand(100000000000, 999999999999); // 12 chars long | |
if ($this->prefix) { | |
$this->code = $this->prefix . $this->code; | |
$this->code = substr($this->code, 0, -strlen($this->prefix)); | |
} | |
// Get latest digit | |
$this->code .= $this->getCheckDigit(); | |
return $this->code; | |
} | |
private function getCheckDigit() | |
{ | |
$codePartials = str_split($this->code); | |
$checkdigit = null; | |
$evenNumbers = 0; | |
$oddNumbers = 0; | |
foreach ($codePartials as $key => $value) { | |
if (($key + 1) % 2 == 0) { // Keys start from 0, We want the start to be 1 | |
$evenNumbers += $value; | |
} else { | |
$oddNumbers += $value; | |
} | |
} | |
$evenNumbers = $evenNumbers * 3; | |
$total = $evenNumbers + $oddNumbers; | |
if ($total % 10 == 0) { | |
$checkdigit = 0; | |
} else { | |
$next_multiple = $total + (10 - $total % 10); | |
$checkdigit = $next_multiple - $total; | |
} | |
return $checkdigit; | |
} | |
} | |
if ( !function_exists('create_mfg_code') ) { | |
function create_mfg_code($mfg_name) | |
{ | |
$rand = mt_rand(00000, 99999); | |
$code = initials( $mfg_name ); | |
$gen = $code . $rand; | |
return substr( $gen, 0, -strlen($code) ); | |
} | |
} | |
if ( !function_exists('initials') ) { | |
function initials($str) { | |
$ret = null; | |
foreach (explode(' ', $str) as $word) { | |
$num = to_num(strtolower($word[0])); | |
$ret .= $num; | |
} | |
return $ret; | |
} | |
} | |
if ( !function_exists('to_num') ) { | |
function to_num($data) { | |
$alphabet = array( 'a', 'b', 'c', 'd', 'e', | |
'f', 'g', 'h', 'i', 'j', | |
'k', 'l', 'm', 'n', 'o', | |
'p', 'q', 'r', 's', 't', | |
'u', 'v', 'w', 'x', 'y', | |
'z' | |
); | |
$alpha_flip = array_flip($alphabet); | |
$return_value = -1; | |
$length = strlen($data); | |
for ($i = 0; $i < $length; $i++) { | |
$return_value += | |
($alpha_flip[$data[$i]] + 1) * pow(26, ($length - $i - 1)); | |
} | |
return $return_value; | |
} | |
} | |
// Create Number System | |
$number_system = 17; | |
// Craete Manufactur Code | |
$mfg_code = create_mfg_code( 'Gudang Timur' ); | |
// Craete Product Code | |
$product_code = substr(round(microtime(true)),0,5); | |
// Combine | |
$item_code = $number_system . $mfg_code . $product_code; | |
echo "-------------" . PHP_EOL; | |
echo "Number System: " . $number_system . ' ('.strlen($number_system).')' . PHP_EOL; | |
echo "Manufactur Code: " . $mfg_code . ' ('.strlen($mfg_code).')' . PHP_EOL; | |
echo "Product Code: " . $product_code . ' ('.strlen($product_code).')' . PHP_EOL; | |
echo "Total Length: " . strlen($item_code) . PHP_EOL; | |
echo "-------------" . PHP_EOL; | |
$barcode = EAN13::create($item_code); | |
echo "Barcode: ". $barcode . PHP_EOL; |
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