本文实例讲述了PHP使用 Imagick 扩展实现图片合成,圆角处理功能。分享给大家供大家参考,具体如下:
需求:为用户生成特定的二维码 ,拉取用户的微信头像 和特定的背景图合成一张用户专属海报
方法:采用PHP的Imagick扩展功能对图片进行合成处理。对微信头像进行圆角处理,然后压缩图片的质量
- public static function getTicket($scene_id)
- {
- $qrcode = '{"expire_seconds": 2592000,"action_name": "QR_SCENE","action_info": {"scene": {"scene_id": $scene_id }}}'; //二维码信息
- $access_token = self::getToken(); //公众号token,这个要获取自己公众号的
- $getticket_url = "https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=$access_token";
- $ticketinfo = self::request_by_curl($getticket_url,$qrcode);
- return $ticketinfo['ticket']; //专属二维码的ticken
- }
- public static function request_by_curl($remote_server,$post_string='')
- {
- $ch = curl_init();
- curl_setopt($ch,CURLOPT_URL,$remote_server);
- curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
- curl_setopt($ch,CURLOPT_CUSTOMREQUEST,"POST");
- curl_setopt($ch,CURLOPT_POSTFIELDS,$post_string);
- curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);
- curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,CURLOPT_FOLLOWLOCATION,1);
- curl_setopt($ch,CURLOPT_AUTOREFERER,CURLOPT_HTTPHEADER,array("Expect: "));
- curl_setopt($ch,CURLOPT_USERAGENT,'Mozilla/5.0 (compatible; MSIE 5.01; Windows NT 5.0)');
- $content = curl_exec($ch);
- curl_close($ch);
- $reArr=json_decode($content,true);
- return $reArr;
- }
2、 合成海报
- public function CompositeImage ($ticket,$wxnick,$userId)
- {
- $Qrcode = new Imagick("https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=$ticket");
- $Qrcode->setImageResolution(0.1,0.3); //设置图片分辨率
- $QrcodeWH = $Qrcode->getImageGeometry(); //获取源图片宽和高
- if ($QrcodeWH['width']>200) {
- $QrcodeW['width'] = 200;
- $QrcodeH['height'] = $QrcodeW['width']/$QrcodeWH['width']*$QrcodeWH['height'];
- } else {
- $QrcodeW['width'] = $QrcodeWH['width'];
- $QrcodeH['height'] = $QrcodeWH['height'];
- }
- $Qrcode->thumbnailImage( $QrcodeW['width'],$QrcodeWH['height'],true ); //按照选定的比例进行缩放
- // 预先下载微信头像,再生成合成信息
- $curl = curl_init($wxnick);
- $wxnickpath = "upload/wxnick/".$userId.".jpg";
- curl_setopt($curl,1);
- $imageData = curl_exec($curl);
- curl_close($curl);
- $tp = @fopen($wxnickpath,'a');
- fwrite($tp,$imageData);
- fclose($tp);
- $weixin = new Imagick($wxnickpath);
- $weixin->setImageResolution(0.1,0.3);
- $weixin->roundCorners(360,360); //圆角处理
- $wxWH = $weixin->getImageGeometry();
- if ($wxWH['width']>200) {
- $wxW['width'] = 200;
- $wxH['height'] = $wxW['width']/$wxWH['width']*$wxWH['height'];
- } else {
- $wxW['width'] = $wxWH['width'];
- $wxH['height'] = $wxWH['height'];
- }
- $weixin->thumbnailImage( $wxW['width'],$wxWH['height'],true );//等比例缩放
- //创建一个Imagick对象,同时获取要处理的背景图 /data/wenda/htdocs/upload
- $poster = new Imagick( "/data/wenda/htdocs/upload/poster.png" );
- $posterWH = $poster->getImageGeometry();
- $posterW['width'] = $posterWH['width'];
- $posterH['height'] = $posterWH['height'];
- // 按照缩略图大小创建一个有颜色的图片
- $canvas = new Imagick();
- $canvas->newImage( $posterW['width'],$posterH['height'],'black','jpg' );
- //二维码 微信头像 背景 合成
- $poster->compositeImage($Qrcode,Imagick::COMPOSITE_OVER,275,960);
- $poster->compositeImage($weixin,402);
- $canvas->compositeImage( $poster,imagick::COMPOSITE_OVER,0);
- $canvas->setImageCompressionQuality(60); //压缩质量
- $canvas->writeImage( "/upload/poster/$userId.jpg" ); //生成图片
- return $canvas; //返回图片流信息
- }
- header( "Content-Type: image/jpg" ); //输出图片
- $posterimg = $this->CompositeImage($Fticket,$Fwnick,$userId);
- echo $posterimg //输出图片
更多关于PHP相关内容感兴趣的读者可查看本站专题:《PHP扩展开发教程》、《PHP网络编程技巧总结》、《PHP curl用法总结》、《PHP数组(Array)操作技巧大全》、《PHP图形与图片操作技巧汇总》及《PHP字符串(string)用法总结》
希望本文所述对大家PHP程序设计有所帮助。