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
1. 根据微信用户特定id生成专属二维码
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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($ch, CURLOPT_SSL_VERIFYHOST, FALSE); curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); curl_setopt($ch, CURLOPT_AUTOREFERER, 1); curl_setopt($ch, 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 $reArr;} |
2、 合成海报
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public function CompositeImage ($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,CURLOPT_RETURNTRANSFER,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,Imagick::COMPOSITE_OVER,275,402); $canvas->compositeImage( $poster, imagick::COMPOSITE_OVER, 0, 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 |
希望本文所述对大家PHP程序设计有所帮助。
原文链接：https://blog.csdn.net/hxmandzzx/article/details/52794357
