Podgląd pliku: / books / includes / generate_code39.php

<?php
/***************************************************** 
 *                System biblioteczny                * 
 ***************************************************** 
 * Wersja: 1.3 Stable                                * 
 * Data: 17.06.2012 (15:07)                          * 
 * Autor: Jacek Kowalski (http://jacekk.info)        * 
 *                                                   * 
 * Utwor rozprowadzany na licencji                   * 
 * http://creativecommons.org/licenses/by-nc-sa/2.5/ * 
 *****************************************************/

if(!extension_loaded('gd')) {
    error::add('Brak rozszerzenia GD/GD2. Generowanie kodów kreskowych jest niemożliwe.');
}

$code = array(
    'SS' => '100101101101',
    'BT' => '0',
    '0' => '101001101101',
    '1' => '110100101011',
    '2' => '101100101011',
    '3' => '110110010101',
    '4' => '101001101011',
    '5' => '110100110101',
    '6' => '101100110101',
    '7' => '101001011011',
    '8' => '110100101101',
    '9' => '101100101101',
    'A' => '110101001011',
    'B' => '101101001011',
    'C' => '110110100101',
    'D' => '101011001011',
    'E' => '110101100101',
    'F' => '101101100101',
    'G' => '101010011011',
    'H' => '110101001101',
    'I' => '101101001101',
    'J' => '101011001101',
    'K' => '110101010011',
    'L' => '101101010011',
    'M' => '110110101001',
    'N' => '101011010011',
    'O' => '110101101001',
    'P' => '101101101001',
    'Q' => '101010110011',
    'R' => '110101011001',
    'S' => '101101011001',
    'T' => '101011011001',
    'U' => '110010101011',
    'V' => '100110101011',
    'W' => '110011010101',
    'X' => '100101101011',
    'Y' => '110010110101',
    'Z' => '100110110101',
    '-' => '100101011011',
    '.' => '110010101101',
    ' ' => '100110101101',
    '$' => '100100100101',
    '/' => '100100101001',
    '+' => '100101001001',
    '%' => '101001001001',
);

function gen_binary($kod) {
    global $code;

    $kod = str_split($kod);
    $ret = '';
    foreach($kod as $key => $val) {
        $ret .= $code[$val].$code['BT'];
    }

    return $ret;
}
function print_code($kod, $img, $b, $w) {
    $kod = str_split($kod);
    foreach($kod as $val) {
        if($val==1) {
            imageline($img, $now, 0, $now, 40, $b);
            $now++;
        }
        elseif($val==0) {
            $now++;
        }
    }
}

function kod($kod) {
    global $code;
    
    if(trim($kod, '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $')!='') {
        error::add('Znaki inne niż cyfry, litery, pauza, kropka, spacja, ukośnik');
    }
    
    $kod = $code['SS'].$code['BT'].gen_binary($kod).$code['SS'];
    
    $i = imagecreate(strlen($kod), 40);
    $w = imagecolorallocate($i, 255, 255, 255);
    $b = imagecolorallocate($i, 0, 0, 0);
    
    print_code($kod, $i, $b, $w);
    
    ob_start();
    imagegif($i);
    $img = ob_get_contents();
    ob_end_clean();
    
    return $img;
}
?>

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