Cuando lo invoco una vez se impreme el valor que le envío al constructor, pero si creo otro objeto (de la misma clase) no me muestra el resultado o peor aún, después de imprimir el primer objeto ya no me muestra ni siquiera un echo.
Script que invoca a la clase: Ejemplo1.php
Código PHP:
<?php
include("Barcode39.php");
#AHORA creo el objeto $OBJETO y llamo a la funcion de impresión.
$OBJETO = new Barcode39('12345678901');
$OBJETO->draw();
echo 'Prueba 1...';
$OBJETO1 = new Barcode39('12345678902');
$OBJETO1->draw();
echo 'Prueba 2...';
?> Código PHP:
<?php
/**
* Barcode39 - Code 39 Barcode Image Generator
*
* @package Barcode39
* @category Barcode39
* @name Barcode39
* @version 1.0
* @author Shay Anderson 05.11
* @link http://www.shayanderson.com/php/php-barcode-generator-class-code-39.htm
* @license http://www.gnu.org/licenses/gpl.html GPL License
* This is free software and is distributed WITHOUT ANY WARRANTY
*/
final class Barcode39 {
/**
* Code 39 format 2 specifications
*/
const f2B = "11";
const f2W = "00";
const f2b = "10";
const f2w = "01";
/**
* Barcode code
*
* @var array $_code
*/
private $_code = array();
/**
* Code 39 matrix
*
* @var array $_codes_39
*/
private $_codes_39 = array(
32 => 100011011001110110,
36 => 100010001000100110,
37 => 100110001000100010,
42 => 100010011101110110,
43 => 100010011000100010,
45 => 100010011001110111,
46 => 110010011001110110,
47 => 100010001001100010,
48 => 100110001101110110,
49 => 110110001001100111,
50 => 100111001001100111,
51 => 110111001001100110,
52 => 100110001101100111,
53 => 110110001101100110,
54 => 100111001101100110,
55 => 100110001001110111,
56 => 110110001001110110,
57 => 100111001001110110,
65 => 110110011000100111,
66 => 100111011000100111,
67 => 110111011000100110,
68 => 100110011100100111,
69 => 110110011100100110,
70 => 100111011100100110,
71 => 100110011000110111,
72 => 110110011000110110,
73 => 100111011000110110,
74 => 100110011100110110,
75 => 110110011001100011,
76 => 100111011001100011,
77 => 110111011001100010,
78 => 100110011101100011,
79 => 110110011101100010,
80 => 100111011101100010,
81 => 100110011001110011,
82 => 110110011001110010,
83 => 100111011001110010,
84 => 100110011101110010,
85 => 110010011001100111,
86 => 100011011001100111,
87 => 110011011001100110,
88 => 100010011101100111,
89 => 110010011101100110,
90 => 100011011101100110
);
/**
* Width of wide bars in barcode (should be 3:1)
*
* @var int $barcode_bar_thick
*/
public $barcode_bar_thick = 3;
/**
* Width of thin bars in barcode (should be 3:1)
*
* @var int $barcode_bar_thin
*/
public $barcode_bar_thin = 1; #GROSOR DE CODIGO DE BARRAS
/**
* Barcode background color (RGB)
*
* @var array $barcode_bg_rgb
*/
public $barcode_bg_rgb = array(255, 255, 255); #MARCO DE CODIGO DE BARRAS
/**
* Barcode height
*
* @var int $barcode_height
*/
public $barcode_height = 80; #ALTURA DE CODIGO DE BARRA
/**
* Barcode padding
*
* @var int $barcode_padding
*/
public $barcode_padding = 5; #PADDING
/**
* Use barcode text flag
*
* @var bool $barcode_text
*/
public $barcode_text = true; #BOOLEANO SI SE MUESTRA EL TEXTO DEL CODIGO O NO
/**
* Barcode text size
*
* @var int $barcode_text_size
*/
public $barcode_text_size = 3; #TAMAÑO DE ROTULO DE TEXTO
/**
* Use dynamic barcode width (will auto set width)
*
* @var bool $barcode_use_dynamic_width
*/
public $barcode_use_dynamic_width = true; //AJUSTA EL CODIGO CON EL ROTULO DE TEXTO A UN MISMO ANCHO
/**
* Barcode width (if not using dynamic width)
*
* @var int $barcode_width
*/
public $barcode_width = 1000;
/**
* Set and format params
*
* @param string $code
*/
public function __construct($code = null) {
// format and code
$code = (string)strtoupper($code);
// convert code to code array
$i = 0;
while(isset($code[$i])) {
$this->_code[] = $code[$i++];
}
// add start and stop symbols
array_unshift($this->_code,'');
array_push($this->_code,'');
}
/**
* Draw barcode (and save as file if filename set)
*
* @param string $filename (optional)
* @return bool
*/
public function draw($filename = null) {
// check if GB library functions installed
if(!function_exists("imagegif"))
{
return false;
}
// check for valid code
if(!is_array($this->_code) || !count($this->_code)) {
return false;
}
// bars coordinates and params
$bars = array();
// position pointer
$pos = $this->barcode_padding;
// barcode text
$barcode_string = null;
// set code 39 codes
$i = 0;
foreach($this->_code as $k => $v) {
// check for valid code
if(isset($this->_codes_39[ord($v)])) {
// valid code add code 39, also add separator between characters if not first character
$code = ( $i ? self::f2w : null ) . $this->_codes_39[ord($v)];
// check for valid code 39 code
if($code) {
// add to barcode text
$barcode_string .= " {$v}";
// init params
$w = 0;
$f2 = $fill = null;
// add each bar coordinates and params
for($j = 0; $j < strlen($code); $j++) {
// format 2 code
$f2 .= (string)$code[$j];
// valid format 2 code
if(strlen($f2) == 2) {
// set bar fill
$fill = $f2 == self::f2B || $f2 == self::f2b ? "_000" : "_fff";
// set bar width
$w = $f2 == self::f2B || $f2 == self::f2W ? $this->barcode_bar_thick : $this->barcode_bar_thin;
// check for valid bar params
if($w && $fill) {
// add bar coordinates and params
$bars[] = array($pos, $this->barcode_padding, $pos - 1 + $w,
$this->barcode_height - $this->barcode_padding - 1, $fill);
// move position pointer
$pos += $w;
}
// reset params
$f2 = $fill = null;
$w = 0;
}
}
}
$i++;
// invalid code, remove character from code
} else {
unset($this->_code[$k]);
}
}
// check for valid bar coordinates and params
if(!count($bars)) {
// no valid bar coordinates and params
return false;
}
// set barcode width
$bc_w = $this->barcode_use_dynamic_width ? $pos + $this->barcode_padding : $this->barcode_width;
// if not dynamic width check if barcode wider than barcode image width
if(!$this->barcode_use_dynamic_width && $pos > $this->barcode_width) {
return false;
}
// initialize image
$img = imagecreate($bc_w, $this->barcode_height);
$_000 = imagecolorallocate($img, 0, 0, 0);
$_fff = imagecolorallocate($img, 255, 255, 255);
$_bg = imagecolorallocate($img, $this->barcode_bg_rgb[0], $this->barcode_bg_rgb[1], $this->barcode_bg_rgb[2]);
// fill background
imagefilledrectangle($img, 0, 0, $bc_w, $this->barcode_height, $_bg);
// add bars to barcode
for($i = 0; $i < count($bars); $i++) {
imagefilledrectangle($img, $bars[$i][0], $bars[$i][1], $bars[$i][2], $bars[$i][3], $$bars[$i][4]);
}
// check if using barcode text
if($this->barcode_text) {
// set barcode text box
$barcode_text_h = 10 + $this->barcode_padding;
imagefilledrectangle($img, $this->barcode_padding, $this->barcode_height - $this->barcode_padding - $barcode_text_h,
$bc_w - $this->barcode_padding, $this->barcode_height - $this->barcode_padding, $_fff);
// set barcode text font params
$font_size = $this->barcode_text_size;
$font_w = imagefontwidth($font_size);
$font_h = imagefontheight($font_size);
// set text position
$txt_w = $font_w * strlen($barcode_string);
$pos_center = ceil((($bc_w - $this->barcode_padding) - $txt_w) / 2);
// set text color
$txt_color = imagecolorallocate($img, 0, 255, 255);
// draw barcod text
imagestring($img, $font_size, $pos_center, $this->barcode_height - $barcode_text_h - 2,
$barcode_string, $_000);
}
// check if writing image
if($filename)
{
imagegif($img, $filename);
// display image
} else {
//header("Content-type: image/gif");
imagegif($img);
}
imagedestroy($img);
// valid barcode
return true;
}
}
?> Gracias por la ayuda.
