Introduction to the opening of PHP development verification code tutorial

This course develops a PHP verification code and explains the ideas for developing PHP verification codes, code implementation logic, etc.

Implementation steps

1. The function creates a base map of 100, 30

2. Add color to the base map Area

3.Set the distance between content and

4.Add interference points

5.Add interference lines

6.Destroy pictures

Function developed in this tutorial

1. Production of digital verification code

2. Number plus English verification code Production

3. Use of verification code