PHP LibrariesPicture libraryPHP encapsulation class for adding watermarks, compression, and cutting to imagesPHP mainly uses GD library extension to operate image files. When we frequently use PHP to operate images, we will naturally encapsulate many functions, otherwise we will write too much repetitive code. When there are many functions related to pictures, we can consider organizing these functions, so we have the idea of encapsulating them into classes.
There are four main steps to operating pictures:
Step 1: Open the picture
Step 2: Manipulate the picture
Step 3: Output the picture
Step 4: Destroy the image
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