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How does nginx add watermark to images through PHP proxy (detailed code)
How does nginx add watermark to images through PHP proxy (detailed code)
Jun 09, 2022 am 09:54 AM
This article brings you relevant knowledge about how nginx adds watermarks to images through PHP agents, as well as related issues about how to call them, through code examples. , let’s take a look at it, I hope it will be helpful to everyone.
(Recommended tutorials: nginx tutorial, PHP video tutorial)
nginx configuration proxy
location ~ /image/.*\.(gif|jpg|jpeg|png)$ {
proxy_pass http://127.0.0.1:8888/test/watermark?url=$request_uri;
}/img/ matches the directory prefix to be proxied, and the $request_uri parameter is the image path to be accessed.
php watermark class
/** 水印類(lèi)
* Class Watermark
* @package app\test
*/
class Watermark
{
/** 合成圖片水印
* @param string $dstImage 原圖片
* @param string $waterImg 水印圖
*/
public static function imageMarking($dstImage, $waterImg){
//獲取圖片信息
$dstInfo = getimagesize($dstImage);
$waterInfo = getimagesize($waterImg);
//創(chuàng)建圖像
$dstImgObj = self::imageCreateFrom($dstImage, $dstInfo[2]);
$waterImgObj = self::imageCreateFrom($waterImg, $waterInfo[2]);
//合成水印
imagecopyresized($dstImgObj,$waterImgObj,0, 0,0,0,$dstInfo[0], $dstInfo[1],$waterInfo[0],$waterInfo[1]);
//輸出圖片
self::imageOut($dstImgObj,$waterInfo[2]);
//銷(xiāo)毀資源對(duì)象
imagedestroy($dstImgObj);
imagedestroy($waterImgObj);
}
/** 生成圖片對(duì)象
* @param string $imgFile 圖片路徑
* @param string $type 圖片類(lèi)型
* @return false|\GdImage|resource
*/
private static function imageCreateFrom($imgFile, $type) {
switch ($type) {
case IMAGETYPE_GIF:
return imagecreatefromgif($imgFile);
case IMAGETYPE_JPEG:
return imagecreatefromjpeg($imgFile);
case IMAGETYPE_PNG:
return imagecreatefrompng($imgFile);
default : //其他格式
}
}
/** 輸出圖片
* @param string $imageObj
* @param string $type
*/
private static function imageOut($imageObj,$type){
switch ($type) {
case 1:
header("Content-Type: image/gif");
imagegif($imageObj);
break;
case 2:
header("Content-Type: image/jpeg");
imagejpeg($imageObj);
break;
case 3:
header("Content-Type: image/png");
imagepng($imageObj);
break;
default: //其他格式
}
}
}Call example
public function watermark(){
//圖片路徑前綴
$image = '/data/img/' . input('url');
self::imageMarking($image,'watermark.png');
exit;
}nginx If you are good at it, you can try to use the http_image_filter_module module to add watermarks , This is also a helpless move for me
(Recommended tutorials: nginx tutorial, PHP video tutorial)
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