php 条形码生成器 PHP条形码图像生成器

这是一个用于生成barocdes的简单

PHP脚本：

//For displaying barcodes

//Arguments are:

// code Number you want outputted as a barcode

//You can use this script in two ways:

// From a webpage/PHP script

// Directly in your web browser /images/barcode.php?code=12345

//Outputs the code as a barcode, surrounded by an asterisk (as per standard)

//Will only output numbers, text will appear as gaps

//Image width is dynamic, depending on how much data there is

//Get the barcode font (called 'free3of9') from here /free-barcode-font/

header("Content-type: image/png");

$file = "images/barcode.png"; // path to base png image

$im = imagecreatefrompng($file); // open the blank image

$string = $_GET['code']; // get the code from URL

imagealphablending($im, true); // set alpha blending on

imagesavealpha($im, true); // save alphablending setting (important)

$black = imagecolorallocate($im, 0, 0, 0); // colour of barcode

$font_height=40; // barcode font size. anything smaller and it will appear jumbled and will not be able to be read by scanners

$newwidth=((strlen($string)*20)+41); // allocate width of barcode. each character is 20px across, plus add in the asterisk's

$thumb = imagecreatetruecolor($newwidth, 40); // generate a new image with correct dimensions

imagecopyresized($thumb, $im, 0, 0, 0, 0, $newwidth, 40, 10, 10); // copy image to thumb

imagettftext($thumb, $font_height, 0, 1, 40, $black, 'c:\windows\fonts\free3of9.ttf', '*'.$string.'*'); // add text to image

//show the image

imagepng($thumb);

imagedestroy($thumb);

?>

希望这可以帮助你.