我正在尝试使用此功能从亚马逊s3的外部网址创建缩略图。
function resizeImage($originalImage,$toWidth,$toHeight){
// Get the original geometry and calculate scales
list($width, $height) = file_get_contents($originalImage);
$xscale=$width/$toWidth;
$yscale=$height/$toHeight;
// Recalculate new size with default ratio
if ($yscale>$xscale){
$new_width = round($width * (1/$yscale));
$new_height = round($height * (1/$yscale));
}
else {
$new_width = round($width * (1/$xscale));
$new_height = round($height * (1/$xscale));
}
// Resize the original image
$imageResized = imagecreatetruecolor($new_width, $new_height);
$imageTmp = imagecreatefromjpeg ($originalImage);
imagecopyresampled($imageResized, $imageTmp, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
return $imageResized;
}
我遇到的问题是它似乎只与相对网址一起使用时出现以下错误。
Warning: Division by zero in /home/isd/public_html/swfupload/resize.php on line 15
Warning: Division by zero in /home/isd/public_html/swfupload/resize.php on line 16
Warning: imagecreatetruecolor() [function.imagecreatetruecolor]: Invalid image dimensions in /home/isd/public_html/swfupload/resize.php on line 20
Warning: imagecreatefromjpeg(Chrysanthemum.jpg) [function.imagecreatefromjpeg]: failed to open stream: No such file or directory in /home/isd/public_html/swfupload/resize.php on line 21
Warning: imagecopyresampled(): supplied argument is not a valid Image resource in /home/isd/public_html/swfupload/resize.php on line 22
Warning: Division by zero in /home/isd/public_html/swfupload/resize.php on line 15
Warning: Division by zero in /home/isd/public_html/swfupload/resize.php on line 16
Warning: imagecreatetruecolor() [function.imagecreatetruecolor]: Invalid image dimensions in /home/isd/public_html/swfupload/resize.php on line 20
Warning: imagecreatefromjpeg(Desert.jpg) [function.imagecreatefromjpeg]: failed to open stream: No such file or directory in /home/isd/public_html/swfupload/resize.php on line 21
Warning: imagecopyresampled(): supplied argument is not a valid Image resource in /home/isd/public_html/swfupload/resize.php on line 22
Warning: file_get_contents(http://isdprogress.s3.amazonaws.com/HQ preview.jpg) [function.file-get-contents]: failed to open stream: HTTP request failed! HTTP/1.1 505 HTTP Version Not Supported in /home/isd/public_html/swfupload/resize.php on line 5
现在有没有人可以使用的方法或功能可以将图像从外部网址调整为thunmbnails ???
由于
答案 0 :(得分：2)
file_get_contents不返回图像资源的宽度和高度。
它将文件的内容返回到字符串：http://hu2.php.net/manual/en/function.file-get-contents.php
使用imagesx和imagesy代替：
http://hu2.php.net/manual/en/function.imagesx.php
http://hu2.php.net/manual/en/function.imagesy.php
添加
我不知道你的过程，但我认为你只是将图像作为字符串检索到file_get_contents，这不是一个有效的图像资源。
因此，您必须将此数据转换为图像资源。使用imagecreatefromstring函数：http://hu2.php.net/manual/en/function.imagecreatefromstring.php
免责声明：我没有看到您的完整代码，因此您只是猜测您没有图片资源：）
答案 1 :(得分：0)