将用于表明排序方向的图像添加到适当的图像目录中。
Add images to the appropriate images directory that display what you want to be used to indicate the sort direction.
将包含新的背景GIF图像的文件添加到主题中的图像目录中。
Add the file with the new background GIF image to the images directory in the theme. First, navigate to.
您还需要确保缓存和图像目录是可写入的，因为TCPDF将在那里存储临时文件。
You also need to make sure that the cache and images directories are writable, since TCPDF will store temporary files there.
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