Detailed explanation of the steps to implement inverse color processing of images in PHP

This time I will bring you a detailed explanation of the steps for inverting images in PHP. What are the precautions for inverting images in PHP? The following is a practical case, let’s take a look.

Today I have a need to use PHP to invert the color of the image and convert it to gray. I didn’t know if it was possible before, but then I saw the

imagefilter() function, which is more than enough to convert it to gray. It is so powerful. ;

Of course, some people also set gray in css

php color change code:

Test code:

Original picture (take this childhood-ruining spoof picture commonly used by the editor as an example):

After running (this is mainly for testing, As for whether the picture subverts the three views or the five senses, the editor will not ask too much~):

I believe you have mastered the method after reading the case in this article. For more exciting things, please pay attention to php Other related articles on the Chinese website!

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