How to implement arithmetic verification code in php

This article mainly introduces the method of implementing arithmetic verification code in PHP. It has certain reference value. Now I share it with you. Friends in need can refer to it.

I have recently learned PHP. I also practiced the implementation of image functions and verification codes. Following the teacher’s advice, I wrote an arithmetic verification code function. It was the first time I completed a small exercise independently. I felt quite happy. However, I also knew my own limitations. , so I wrote it out specifically, hoping that the experts from all walks of life can give me some guidance and expand my horizons more

The php code is as follows: Implement the function of the verification code

      
Part of the code of html
      
     
 验证码   
 提交
      
Test of test.php
      

      
The above is the composition of my code.
I hope everyone can The great god is willing to teach you [Looking forward to the face]
      
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