php教程

超轻量级php框架startmvc

PHP使用 Imagick 扩展实现图片合成,圆角处理功能示例

更新时间:2020-04-08 04:10:05 作者:startmvc
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,

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


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


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

PHP Imagick 图片合成 圆角处理