我刚才在我的Apache上安装了GD库,似乎我的下面的脚本不起作用。 我正在尝试在youtube视频缩略图中添加“play.png”图层(http://img.youtube.com/vi/VIDEOID/default.jpg)
我尝试过很多不同的视频ID,但图片没有加载。有一条消息说无法打开图形,因为它包含错误。
我用postimage.php打开文件?v = 7yV_JtFnIwo
http://img.youtube.com/vi/7yV_JtFnIwo/default.jpg也正确打开...
有谁知道问题出在哪里?
提前致谢!
<?php
// The header line informs the server of what to send the output
// as. In this case, the server will see the output as a .png
// image and send it as such
header ("Content-type: image/png");
// Defining the background image. Optionally, a .jpg image could
// could be used using imagecreatefromjpeg, but I personally
// prefer working with png
$background = imagecreatefromjpeg("http://img.youtube.com/vi/".$_GET['v']."/default.jpg");
// Defining the overlay image to be added or combined.
$insert = imagecreatefrompng("play.png");
// Select the first pixel of the overlay image (at 0,0) and use
// it's color to define the transparent color
imagecolortransparent($insert,imagecolorat($insert,0,0));
// Get overlay image width and hight for later use
$insert_x = imagesx($insert);
$insert_y = imagesy($insert);
// Combine the images into a single output image. Some people
// prefer to use the imagecopy() function, but more often than
// not, it sometimes does not work. (could be a bug)
imagecopymerge($background,$insert,0,0,0,0,$insert_x,$insert_y,100);
// Output the results as a png image, to be sent to viewer's
// browser. The results can be displayed within an HTML document
// as an image tag or background image for the document, tables,
// or anywhere an image URL may be acceptable.
imagepng($background,"",100);
?>
答案 0 :(得分:1)
请勿使用?>
关闭(避免使用空格或新闻专线)并使用NULL
代替""
。
imagepng($background, NULL);
然后,在imagepng中,质量参数介于0和9之间,如http://it.php.net/manual/en/function.imagepng.php所示。