PHP图像复制＆amp; imagecopymerge将背景从透明变为黑色

Question

我正在复制一张图像并放置在第二张图像上，第二张图像在背景中是透明的。同时复制第二图像的背景转换为黑色。即使我刚从文件初始化图像后显示图像，它也给我黑色背景。请帮忙..

<?php  

header('Content-type:image/png'); 

$watermark = imagecreatefrompng('eye.png');  

$watermark_width = imagesx($watermark);  

$watermark_height = imagesy($watermark);  

$image = imagecreatetruecolor($watermark_width, $watermark_height);  

$image = imagecreatefrompng('img.png');  

$size = getimagesize('img.png');  

$dest_x = $size[0] - $watermark_width - 5;  

$dest_y = $size[1] - $watermark_height - 5;  

imagecopyresampled($image, $watermark, 5, 5, 0,0,55 ,55, $watermark_width, $watermark_height);  
//imagecopymerge($image, $watermark, 5, 5, 0, 0, $watermark_width, $watermark_height, 50);  

imagejpeg($image);  

imagedestroy($image);  

imagedestroy($watermark);  
?>

Answer 1

删除功能

imagejpeg($image); 

并添加

imagealphablending($image, false); 
imagesavealpha($image,true);
imagepng($image);