Daily Beats | PHP Draw Image Verification code

The verification code is a security mechanism that requires manual verification at the time of registration to prevent a large number of registered user accounts in the garbage register from occupying server memory and thus causing the server to be paralyzed.

The implementation of the picture verification code is very simple. First, randomly extract a fixed number of characters from the specified character set, draw in an irregular way on the canvas, add some interference points and interference elements, finally the picture output, a new verification code is completed.

The front-end code is as follows:

    
 
      This is a test!    
 
          

The code for the PHP script file verification codes is as follows:

Finally, take a look at the generated verification code:

Click Refresh:

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