Seven syntax descriptions in the PHP class

Seven syntax descriptions in a class

-Properties
-Static properties
-Method
-Static method
-Class constants
-Constructor function
-destructor

<?php     class Student {        //classes have access to properties, methods, and functions (functions and methods are the same concept)        //Private protected protected public        //class constant does not have access permission modifiers        ConstSTUDENT =' Tom ';//Properties         Public $stu _name;//static properties         Public Static $stu _num=1;//Method         Public  function stufunction() {            Echo ' Non_static_function ',' <br/> '; }//static method         Public Static  function static_stufunction() {            Echo ' Static_function ',' <br/> '; }//constructor is called automatically when an object is created         Public  function __construct($stu _name) {            $this->stu_name =$stu _name;Echo ' __construct ',' <br/> '; }//destructors are automatically called when destroying objects         Public  function __destruct() {            Echo ' __destruct ',' <br/> '; }    }//Instantiate class object    $object=NewStudent (' Tom ');//Object invocation Properties    Echo $object->stu_name,' <br/> ';//Object call static property    Echo $object::$stu _num,' <br/> ';//Class Call static property    EchoStudent::$stu _num,' <br/> ';//Use objects to invoke methods and static methods, respectively    $object->stufunction ();$object->static_stufunction ();$object:: Stufunction ();$object:: Static_stufunction ();//Use classes to invoke methods and static methods, respectivelyStudent::stufunction (); Student::static_stufunction ();//Class calling Class constants    EchoStudent::student,' <br/> ';

Summary: Objects can call properties and static properties, and classes can only invoke static properties. objects can call methods and static methods, and classes can call methods and static methods.

Seven syntax descriptions in the PHP class