利用phpqrcode生成二维码实例代码
QR码详细原理可以参考QR维基百科，中文版介绍比较少，英文版介绍很全面，推荐看英文版的。
Description
PHP QR Code is open source (LGPL) library for generating QR Code, 2-dimensional barcode. Based on libqrencode C library, provides API for creating QR Code barcode images (PNG, JPEG thanks to GD2). Implemented purely in PHP.
Features
•Supports QR Code versions (size) 1-40
•Numeric, Alphanumeric, 8-bit and Kanji encoding.
•Implemented purely in PHP, no external dependencies except GD2
•Exports to PNG, JPEG images, also exports as bit-table
•TCPDF 2-D barcode API integration
•Easy to configure
•Data cache for calculation speed-up
•Debug data dump, error logging, time benchmarking
•Provided merge tool helps deploy library as a one file
•new! API documentation
•new! Over 30 detailed examples
•100% Open Source, LGPL Licensed
Demo
项目地址：http://sourceforge.net/projects/phpqrcode/
Generate fixed size images
* phpqrcode本身未提供固定大小二维码的设置，请参考 http://sourceforge.net/p/phpqrcode/discussion/1111884/thread/f739531a/
<table width="620" align="center" border="0" cellpadding="1" cellspacing="1" style="background:#FB7"> <tr> <td width="464" height="27" bgcolor="#FFE7CE"> 代码如下</td> <td width="109" align="center" bgcolor="#FFE7CE" style="cursor:pointer;" onclick="doCopy('copy9169')">复制代码</td> </tr> <tr> <td height="auto" colspan="2" valign="top" bgcolor="#FFFFFF" style="padding:10px;" class="copyclass" id=copy9169>
--- original/phpqrcode/qrimage.php 2010-08-18 07:06:24.000000000 -0700
qrimage.php 2012-07-13 00:51:57.000000000 -0700
@@ -86,10 86,15 @@
}
}
- $target_image =ImageCreate($imgW * $pixelPerPoint, $imgH * $pixelPerPoint);
- ImageCopyResized($target_image, $base_image, 0, 0, 0, 0, $imgW * $pixelPerPoint, $imgH * $pixelPerPoint, $imgW, $imgH);
$targetW = (defined('IMAGE_WIDTH') ? IMAGE_WIDTH : $imgW * $pixelPerPoint );
$targetH = (defined('IMAGE_HEIGHT') ? IMAGE_HEIGHT : $imgH * $pixelPerPoint );
$target_image =ImageCreate($targetW, $targetH);
ImageCopyResized($target_image, $base_image, 0, 0, 0, 0, $targetW, $targetH, $imgW, $imgH);
ImageDestroy($base_image);
return $target_image;
}
- }
No newline at end of file
}
用法，设置生成的二维码宽高为 500px
define('IMAGE_WIDTH', 500);
define('IMAGE_HEIGHT', 500);
QRcode::png('http://www.jiaochengji.com/)');
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