如何在php中生成条形码

Question

我从我的讲师那里得到了这个示例代码。我想修改代码，以便它可以从数据库获取我的数据以生成条形码。我已经阅读了一些文章，但我仍然对生成条形码有所了解。那么我现在应该怎么做？你的帮助真的很感激。

<?php 
 
// Including all required classes 
 
require_once('class/BCGFontFile.php'); 
 
require_once('class/BCGColor.php'); 
 
require_once('class/BCGDrawing.php'); 
 

 
// Including the barcode technology 
 
require_once('class/BCGcode39.barcode.php'); 
 

 
// Loading Font 
 
$font = new BCGFontFile('./font/Arial.ttf', 18); 
 

 
// Don't forget to sanitize user inputs 
 
$text = isset($_GET['text']) ? $_GET['text'] : '7895565'; 
 

 
// The arguments are R, G, B for color. 
 
$color_black = new BCGColor(0, 0, 0); 
 
$color_white = new BCGColor(255, 255, 255); 
 

 
$drawException = null; 
 
try { 
 
    $code = new BCGcode39(); 
 
    $code->setScale(2); // Resolution 
 
    $code->setThickness(30); // Thickness 
 
    $code->setForegroundColor($color_black); // Color of bars 
 
    $code->setBackgroundColor($color_white); // Color of spaces 
 
    $code->setFont($font); // Font (or 0) 
 
    $code->parse($text); // Text 
 
} catch(Exception $exception) { 
 
    $drawException = $exception; 
 
} 
 

 
/* Here is the list of the arguments 
 
1 - Filename (empty : display on screen) 
 
2 - Background color */ 
 
$drawing = new BCGDrawing('', $color_white); 
 
if($drawException) { 
 
    $drawing->drawException($drawException); 
 
} else { 
 
    $drawing->setBarcode($code); 
 
    $drawing->draw(); 
 
} 
 

 
// Header that says it is an image (remove it if you save the barcode to a file) 
 
header('Content-Type: image/png'); 
 
header('Content-Disposition: inline; filename="barcode.png"'); 
 

 
// Draw (or save) the image into PNG format. 
 
$drawing->finish(BCGDrawing::IMG_FORMAT_PNG); 
 
?>

Answer 1

您的条形码是由该代码生成：$code->parse($text); // Text

哪里$text是$text = isset($_GET['text']) ? $_GET['text'] : '7895565';

因此，所有你需要做的$text = $db->fetch();