A complete PHP class contains seven syntax descriptions

A complete PHP class contains seven syntax descriptions

This article mainly introduces seven complete syntax descriptions of PHP classes, including attributes, static attributes, methods, static methods, class constants, constructors, and destructor, this article provides sample code and detailed Annotations to help you quickly understand how to write classes. For more information, see

Class Seven syntax descriptions

-Attributes

-Static attributes

-Method

-Static Method

-Class Constants

-Constructor

-Destructor

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<? Php Class Student { // You have the permission to access attributes, methods, and functions in the class (functions and methods are the same concept) // Private protected public // The class constant does not have an access modifier Const STUDENT = 'Tom '; // Attributes Public $ stu_name; // Static attributes Public static $ stu_num = 1; // Method Public function stuFunction (){ Echo 'non _ static_function ',' <br/> '; } // Static method Public static function static_stuFunction (){ Echo 'static _ function', '<br/> '; } // Automatically called when the constructor creates an object Public function _ construct ($ stu_name ){ $ This-> stu_name = $ stu_name; Echo '_ construct', '<br/> ';   } // The Destructor is automatically called when an object is destroyed. Public function _ destruct (){ Echo '_ destruct', '<br/> '; } }   // Instantiate a Class Object $ Object = new Student ('Tom '); // Object call attributes Echo $ object-> stu_name, '<br/> '; // Static attributes of object calls Echo $ object: $ stu_num, '<br/> '; // Class call static attributes Echo Student: $ stu_num, '<br/> '; // Call methods and static methods respectively using objects $ Object-> stuFunction (); $ Object-> static_stuFunction (); $ Object: stuFunction (); $ Object: static_stuFunction (); // Use classes to call methods and static methods respectively Student: stuFunction (); Student: static_stuFunction (); // Class call class constant Echo Student: STUDENT, '<br/> ';

Summary:

Objects can call attributes and static attributes. classes can only call static attributes.

Objects can call methods and static methods. classes can call methods and static methods.