如何在php中生成條形碼

Question

我從講師那里得到了示例代碼。 我想修改代碼，以便它可以從數據庫中獲取我的數據以生成條形碼。 我讀過幾篇文章，但對生成條形碼還是一無所知。 那我現在該怎么辦？ 非常感謝您的幫助。

 <?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

您的條形碼是通過以下代碼生成的： $code->parse($text); // Text $code->parse($text); // Text

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

因此，您所需要做的就是$text = $db->fetch();