Generate thumbnails and copyright classes for images_PHP tutorial

Generate thumbnails and copyright-added classes for images
In the past few days, I have looked at the image processing functions of PHP. In the past, there was relatively little demand for this aspect, so I didn’t look at it much. I recently took a look at it when I had time. . I feel that some simple functions of image processing are OK, but forget about complex ones. The GD library is already 2.0.1, but it still does not support Chinese. I read a few articles and found that if you want to use Chinese, you can only convert GB2312 to UNICODE and then write the image. It’s too troublesome, so just use English. In the image generation part, you can define the maximum height and width of the image, which is more suitable for systems such as news and photo albums. GD2.0.1 has greatly improved image processing. I tried imageCopyResized and imageCopyResampled. The latter processed images significantly better than the former. According to the manual, the latter basically maintains no distortion when resampling the image after the size is changed, and generates The thumbnail effect is really good.
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