How PHP defines classes and operation examples

In PHP we can define a class that refers to a variable and a collection of functions that use those variables. PHP is a loosely typed language, so overloading by type overloading does not work, and it does not work with different numbers of parameters. Sometimes it is good to overload constructors in orientation, so that you can create objects in different ways (passing different numbers of parameters). In PHP, this is done through classes.

First download a simple definition class library for PHP that we need to use for this lesson: http://www.php.cn/xiazai/leiku/617

After the download, find the PHP class files we need, unzip to our local directory, create a new PHP file!

Once this is done, we will invoke this class in the new PHP file, and instantiate the class:

<?phpinclude_once "dingyi4.php";//Introduce class file  $Wing = new Student;     Instantiate  $Wing->input ("Wing", "male", 33,95,87);  $Wing->showinfo (); echo " 
Run the file and get the results as shown: