解析字符串
调用 str_split 把字符串切割到 QRinput->input 中 生成的QRinput对象内容如下(字符串为 20170726tencent):
QRinput::__set_state(array(
'items' =>
array (
0 =>
QRinputItem::__set_state(array(
'mode' => 0,
'size' => 8,
'data' =>
array (
0 => '2',
1 => '0',
2 => '1',
3 => '7',
4 => '0',
5 => '7',
6 => '2',
7 => '6',
),
'bstream' => NULL,
)),
1 =>
QRinputItem::__set_state(array(
'mode' => 2,
'size' => 7,
'data' =>
array (
0 => 't',
1 => 'e',
2 => 'n',
3 => 'c',
4 => 'e',
5 => 'n',
6 => 't',
),
'bstream' => NULL,
)),
),
'version' => 0,
'level' => 2,
))
编码处理
对上面产生的QRinput对象进行一系列编码处理 : 数据编码、结束符和补齐码、纠错码、掩码、转成二进制等，结果如下 :
array (
0 => '1111111000111001101111111',
1 => '1000001010000000101000001',
2 => '1011101000010001101011101',
3 => '1011101011000000101011101',
4 => '1011101011011011101011101',
5 => '1000001001011001101000001',
6 => '1111111010101010101111111',
7 => '0000000011001101100000000',
8 => '0101111010000100011011010',
9 => '0010110000111100110001001',
10 => '0111111011101101111111011',
11 => '1111000011001100110001000',
12 => '0100011000110101110000110',
13 => '1000010010110010110110011',
14 => '1110111101001110111011000',
15 => '1011110001000001010110101',
16 => '1011011010001010111111000',
17 => '0000000010000010100010111',
18 => '1111111000111001101010011',
19 => '1000001010100110100010100',
20 => '1011101010100101111110001',
21 => '1011101011011010101100001',
22 => '1011101001100111000001111',
23 => '1000001010100000110010101',
24 => '1111111001010101110110011',
)
画图(使用gd库)
- $times 是相对于像素的放大倍数，主要是作图、画圆方便(对一个像素点无法画圆)
- 不要使用 ImageCreate、ImageCopyResized 函数，效果不好(虽然速度快);用
(1). 创建画板
imagecreatetruecolor($imgW*$times, $imgH*$times);
(2). 用白色填充整个画布
imagefill($base_image, 0, 0, $col[0]);
(3). 填充值为1的像素点(这里是画圆)，四个角不填充
imagefilledellipse($source,$pointX,$pointY,$diameter,$diameter,$color);
(4). 填充三个定位角 (5). 拉伸或缩小到指定尺寸
imagecopyresampled($dest_image, $target_image, 0, 0, 0, 0, $imgW * $pixelPerPoint, $imgH * $pixelPerPoint, $imgW * $times, $imgH * $times);
(6). 用看点logo填充右下角
$logo = imagecreatefromstring(file_get_contents('kd_logo.png'));
$logo_width = imagesx($logo);
$logo_height = imagesy($logo);
$from_width = ($imgW - 7 - $outerFrame) * $pixelPerPoint;
imagecopyresampled($dest_image, $logo, $from_width, $from_width, 0, 0, 7 * $pixelPerPoint, 7 * $pixelPerPoint, $logo_width, $logo_height);
显示或保存图片
if ($filename === false) {
Header("Content-type: image/png");
ImagePng($image);
} else {
if($saveandprint===TRUE){
ImagePng($image, $filename);
header("Content-type: image/png");
ImagePng($image);
}else{
ImagePng($image, $filename);
}
}
样例展示
相关链接 : 二维码的生成原理
相关链接 : php demo代码