PHP使用 Imagick 扩展实现图片合成，圆角处理功能示例

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PHP使用 Imagick 扩展实现图片合成，圆角处理功能示例

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

原文链接：http://www.phpfensi.com/php/20211216/19098.html

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