A complete PHP class contains seven syntax instructions, PHP class seven syntax _php tutorial

A complete PHP class contains seven syntax descriptions, PHP class seven syntax

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 constants not accessed    Permission modifier const STUDENT = ' Tom ';    Attribute public $stu _name;    static property public static $stu _num = 1; Method Public Function Stufunction () {echo ' non_static_function ', '
'; }//static method public static function Static_stufunction () {echo ' static_function ', '
';      }//constructor automatically calls public function __construct ($stu _name) {$this->stu_name = $stu _name when creating an object; Echo ' __construct ', '
'; }//destructors automatically call public function __destruct when destroying objects () {echo ' __destruct ', '
';  }}//Instantiate class object $object = new Student (' Tom '); Object Call Property Echo $object->stu_name, '
'; Object call static Property echo $object:: $stu _num, '
'; Class Call Static property Echo Student:: $stu _num, '
';  Use objects to invoke methods and static methods $object->stufunction (), respectively;  $object->static_stufunction ();  $object:: Stufunction ();  $object:: Static_stufunction ();  Use classes to invoke methods and static methods Student::stufunction (), respectively;  Student::static_stufunction (); Class calls the class constant echo student::student, '
';

Summarize:

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.

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