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How to create a QR code class with logo through php
- jackloveOriginal
- 2018-06-08 15:24:381273browse
This article introduces the PHP implementation of creating a QR code class, which supports setting the size, adding LOGO, stroke, rounded corners, transparency, and other processing. Complete code, demonstration examples and detailed parameter descriptions are provided to facilitate everyone's learning and use.
The functions are as follows:
1. Create a QR code
2. Add the logo to the QR code
3. The logo can be stroked
4. The logo can have rounded corners
5. The transparency of the logo can be set
6. The logo image and output image type support png, jpg, and gif formats
7. The output image quality can be set
Setting parameter description:
ecc
QR code quality L-smallest, M, Q, H-best
size
QR code size 1-50
dest_file
Generated QR code image path
quality
Generated image quality
logo
logo path, empty means not to add logo
logo_size
Logo size, null means automatically calculated in proportion to the size of the QR code
logo_outline_size
Logo stroke size, null means automatically calculated in proportion to the logo size
logo_outline_color
logo stroke color
logo_opacity
logo opacity 0-100
logo_radius
logo fillet angle 0-30
The code is as follows:
PHPQRCode.class.php
<?phprequire_once dirname(__FILE__)."/qrcode/qrlib.php";/**
* PHP创建二维码类
* Date: 2018-03-18
* Author: fdipzone
* Version: 1.0
*
* Description:
* PHP实现创建二维码类，支持设置尺寸，加入LOGO，圆角，透明度，等处理。
*
* Func:
* public set_config 设定配置
* public generate 创建二维码
* private create_qrcode 创建纯二维码图片
* private add_logo 合拼纯二维码图片与logo图片
* private image_outline 图片对象进行描边
* private image_fillet 图片对象进行圆角处理
* private imagecopymerge_alpha 合拼图片并保留各自透明度
* private create_dirs 创建目录
* private hex2rgb hex颜色转rgb颜色
* private get_file_ext 获取图片类型
*/class PHPQRCode{ // class start
/** 默认设定 */
private $_config = array( 'ecc' => 'H', // 二维码质量 L-smallest, M, Q, H-best
'size' => 15, // 二维码尺寸 1-50
'dest_file' => 'qrcode.png', // 创建的二维码路径
'quality' => 100, // 图片质量
'logo' => '', // logo路径，为空表示没有logo
'logo_size' => null, // logo尺寸，null表示按二维码尺寸比例自动计算
'logo_outline_size' => null, // logo描边尺寸，null表示按logo尺寸按比例自动计算
'logo_outline_color' => '#FFFFFF', // logo描边颜色
'logo_opacity' => 100, // logo不透明度 0-100
'logo_radius' => 0, // logo圆角角度 0-30
); /**
* 设定配置
* @param Array $config 配置内容
*/
public function set_config($config){
// 允许设定的配置
$config_keys = array_keys($this->_config); // 获取传入的配置，写入设定
foreach($config_keys as $k=>$v){ if(isset($config[$v])){ $this->_config[$v] = $config[$v];
}
}
} /**
* 创建二维码
* @param String $data 二维码内容
* @return String
*/
public function generate($data){
// 创建临时二维码图片
$tmp_qrcode_file = $this->create_qrcode($data); // 合拼临时二维码图片与logo图片
$this->add_logo($tmp_qrcode_file); // 删除临时二维码图片
if($tmp_qrcode_file!='' && file_exists($tmp_qrcode_file)){
unlink($tmp_qrcode_file);
} return file_exists($this->_config['dest_file'])? $this->_config['dest_file'] : '';
} /**
* 创建临时二维码图片
* @param String $data 二维码内容
* @return String
*/
private function create_qrcode($data){
// 临时二维码图片
$tmp_qrcode_file = dirname(__FILE__).'/tmp_qrcode_'.time().mt_rand(100,999).'.png'; // 创建临时二维码
QRcode::png($data, $tmp_qrcode_file, $this->_config['ecc'], $this->_config['size'], 2); // 返回临时二维码路径
return file_exists($tmp_qrcode_file)? $tmp_qrcode_file : '';
} /**
* 合拼临时二维码图片与logo图片
* @param String $tmp_qrcode_file 临时二维码图片
*/
private function add_logo($tmp_qrcode_file){
// 创建目标文件夹
$this->create_dirs(dirname($this->_config['dest_file'])); // 获取目标图片的类型
$dest_ext = $this->get_file_ext($this->_config['dest_file']); // 需要加入logo
if(file_exists($this->_config['logo'])){ // 创建临时二维码图片对象
$tmp_qrcode_img = imagecreatefrompng($tmp_qrcode_file); // 获取临时二维码图片尺寸
list($qrcode_w, $qrcode_h, $qrcode_type) = getimagesize($tmp_qrcode_file); // 获取logo图片尺寸及类型
list($logo_w, $logo_h, $logo_type) = getimagesize($this->_config['logo']); // 创建logo图片对象
switch($logo_type){
case 1: $logo_img = imagecreatefromgif($this->_config['logo']); break;
case 2: $logo_img = imagecreatefromjpeg($this->_config['logo']); break;
case 3: $logo_img = imagecreatefrompng($this->_config['logo']); break;
default: return '';
} // 设定logo图片合拼尺寸，没有设定则按比例自动计算
$new_logo_w = isset($this->_config['logo_size'])? $this->_config['logo_size'] : (int)($qrcode_w/5); $new_logo_h = isset($this->_config['logo_size'])? $this->_config['logo_size'] : (int)($qrcode_h/5); // 按设定尺寸调整logo图片
$new_logo_img = imagecreatetruecolor($new_logo_w, $new_logo_h);
imagecopyresampled($new_logo_img, $logo_img, 0, 0, 0, 0, $new_logo_w, $new_logo_h, $logo_w, $logo_h); // 判断是否需要描边
if(!isset($this->_config['logo_outline_size']) || $this->_config['logo_outline_size']>0){ list($new_logo_img, $new_logo_w, $new_logo_h) = $this->image_outline($new_logo_img);
} // 判断是否需要圆角处理
if($this->_config['logo_radius']>0){ $new_logo_img = $this->image_fillet($new_logo_img);
} // 合拼logo与临时二维码
$pos_x = ($qrcode_w-$new_logo_w)/2; $pos_y = ($qrcode_h-$new_logo_h)/2;
imagealphablending($tmp_qrcode_img, true); // 合拼图片并保留各自透明度
$dest_img = $this->imagecopymerge_alpha($tmp_qrcode_img, $new_logo_img, $pos_x, $pos_y, 0, 0, $new_logo_w, $new_logo_h, $this->_config['logo_opacity']); // 生成图片
switch($dest_ext){ case 1: imagegif($dest_img, $this->_config['dest_file'], $this->_config['quality']); break; case 2: imagejpeg($dest_img, $this->_config['dest_file'], $this->_config['quality']); break; case 3: imagepng($dest_img, $this->_config['dest_file'], (int)(($this->_config['quality']-1)/10)); break;
}
// 不需要加入logo
}else{ $dest_img = imagecreatefrompng($tmp_qrcode_file); // 生成图片
switch($dest_ext){ case 1: imagegif($dest_img, $this->_config['dest_file'], $this->_config['quality']); break; case 2: imagejpeg($dest_img, $this->_config['dest_file'], $this->_config['quality']); break; case 3: imagepng($dest_img, $this->_config['dest_file'], (int)(($this->_config['quality']-1)/10)); break;
}
}
} /**
* 对图片对象进行描边
* @param Obj $img 图片对象
* @return Array
*/
private function image_outline($img){
// 获取图片宽高
$img_w = imagesx($img); $img_h = imagesy($img); // 计算描边尺寸，没有设定则按比例自动计算
$bg_w = isset($this->_config['logo_outline_size'])? intval($img_w + $this->_config['logo_outline_size']) : $img_w + (int)($img_w/5); $bg_h = isset($this->_config['logo_outline_size'])? intval($img_h + $this->_config['logo_outline_size']) : $img_h + (int)($img_h/5); // 创建底图对象
$bg_img = imagecreatetruecolor($bg_w, $bg_h); // 设置底图颜色
$rgb = $this->hex2rgb($this->_config['logo_outline_color']); $bgcolor = imagecolorallocate($bg_img, $rgb['r'], $rgb['g'], $rgb['b']); // 填充底图颜色
imagefill($bg_img, 0, 0, $bgcolor); // 合拼图片与底图，实现描边效果
imagecopy($bg_img, $img, (int)(($bg_w-$img_w)/2), (int)(($bg_h-$img_h)/2), 0, 0, $img_w, $img_h); $img = $bg_img; return array($img, $bg_w, $bg_h);
} /**
* 对图片对象进行圆角处理
* @param Obj $img 图片对象
* @return Obj
*/
private function image_fillet($img){
// 获取图片宽高
$img_w = imagesx($img); $img_h = imagesy($img); // 创建圆角图片对象
$new_img = imagecreatetruecolor($img_w, $img_h); // 保存透明通道
imagesavealpha($new_img, true); // 填充圆角图片
$bg = imagecolorallocatealpha($new_img, 255, 255, 255, 127);
imagefill($new_img, 0, 0, $bg); // 圆角半径
$r = $this->_config['logo_radius']; // 执行圆角处理
for($x=0; $x<$img_w; $x++){ for($y=0; $y<$img_h; $y++){ $rgb = imagecolorat($img, $x, $y); // 不在图片四角范围，直接画图
if(($x>=$r && $x<=($img_w-$r)) || ($y>=$r && $y<=($img_h-$r))){
imagesetpixel($new_img, $x, $y, $rgb); // 在图片四角范围，选择画图
}else{ // 上左
$ox = $r; // 圆心x坐标
$oy = $r; // 圆心y坐标
if( ( ($x-$ox)*($x-$ox) + ($y-$oy)*($y-$oy) ) <= ($r*$r) ){
imagesetpixel($new_img, $x, $y, $rgb);
} // 上右
$ox = $img_w-$r; // 圆心x坐标
$oy = $r; // 圆心y坐标
if( ( ($x-$ox)*($x-$ox) + ($y-$oy)*($y-$oy) ) <= ($r*$r) ){
imagesetpixel($new_img, $x, $y, $rgb);
} // 下左
$ox = $r; // 圆心x坐标
$oy = $img_h-$r; // 圆心y坐标
if( ( ($x-$ox)*($x-$ox) + ($y-$oy)*($y-$oy) ) <= ($r*$r) ){
imagesetpixel($new_img, $x, $y, $rgb);
} // 下右
$ox = $img_w-$r; // 圆心x坐标
$oy = $img_h-$r; // 圆心y坐标
if( ( ($x-$ox)*($x-$ox) + ($y-$oy)*($y-$oy) ) <= ($r*$r) ){
imagesetpixel($new_img, $x, $y, $rgb);
}
}
}
} return $new_img;
} // 合拼图片并保留各自透明度
private function imagecopymerge_alpha($dest_img, $src_img, $pos_x, $pos_y, $src_x, $src_y, $src_w, $src_h, $opacity){
$w = imagesx($src_img); $h = imagesy($src_img); $tmp_img = imagecreatetruecolor($src_w, $src_h);
imagecopy($tmp_img, $dest_img, 0, 0, $pos_x, $pos_y, $src_w, $src_h);
imagecopy($tmp_img, $src_img, 0, 0, $src_x, $src_y, $src_w, $src_h);
imagecopymerge($dest_img, $tmp_img, $pos_x, $pos_y, $src_x, $src_y, $src_w, $src_h, $opacity); return $dest_img;
} /**
* 创建目录
* @param String $path
* @return Boolean
*/
private function create_dirs($path){
if(!is_dir($path)){ return mkdir($path, 0777, true);
} return true;
} /** hex颜色转rgb颜色
* @param String $color hex颜色
* @return Array
*/
private function hex2rgb($hexcolor){
$color = str_replace('#', '', $hexcolor); if (strlen($color) > 3) { $rgb = array( 'r' => hexdec(substr($color, 0, 2)), 'g' => hexdec(substr($color, 2, 2)), 'b' => hexdec(substr($color, 4, 2))
);
} else { $r = substr($color, 0, 1) . substr($color, 0, 1); $g = substr($color, 1, 1) . substr($color, 1, 1); $b = substr($color, 2, 1) . substr($color, 2, 1); $rgb = array( 'r' => hexdec($r), 'g' => hexdec($g), 'b' => hexdec($b)
);
} return $rgb;
} /** 获取图片类型
* @param String $file 图片路径
* @return int
*/
private function get_file_ext($file){
$filename = basename($file); list($name, $ext)= explode('.', $filename); $ext_type = 0; switch(strtolower($ext)){ case 'jpg': case 'jpeg': $ext_type = 2; break; case 'gif': $ext_type = 1; break; case 'png': $ext_type = 3; break;
} return $ext_type;
}
} // class end?>demo.php
<?phprequire 'PHPQRCode.class.php';$config = array( 'ecc' => 'H', // L-smallest, M, Q, H-best
'size' => 12, // 1-50
'dest_file' => 'qrcode.png', 'quality' => 90, 'logo' => 'logo.jpg', 'logo_size' => 100, 'logo_outline_size' => 20, 'logo_outline_color' => '#FFFF00', 'logo_radius' => 15, 'logo_opacity' => 100,
);// 二维码内容$data = 'http://weibo.com/fdipzone';// 创建二维码类$oPHPQRCode = new PHPQRCode();// 设定配置$oPHPQRCode->set_config($config);// 创建二维码$qrcode = $oPHPQRCode->generate($data);// 显示二维码echo '<img src="'.$qrcode.'?t='.time().'" alt="How to create a QR code class with logo through php" >';?>
Generated QR code image: 
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