名称固定为 __construct()。 访问修饰符 控制属性和方法的可见性。 创建对象 使用new 关键字创建类的实例(对象)。 示例: php 复制代码 class Car { public $brand; public $color; public function __construct($brand, $color) { $this->brand = $brand;
public function get( $key ); public function isExist( $key ); public function delete($key); public function getSize(); } classcnDictLinkList implements Dict { protected $size=0; public $key; public $value; public $next; public function __construct($key=null,$value=null,$next=null) {...
phperror_reporting(E_ALL);classtest{public$public;private$private;protected$protected;static$instance;publicfunction__construct(){$this->public= 'public ';$this->private= 'private ';$this->protected= 'protected '; }staticfunctiontank(){if(!isset(self::$instance[get_class()])) {$c=get_cla...
public function __construct(){ //print __CLASS__." "; parent::__construct(); } public function inAdminUserClassPublic(){ print __CLASS__.'::'.__FUNCTION__." "; } protected function inAdminUserClassProtected(){ print __CLASS__.'::'.__FUNCTION__." "; } private function inAdmi...
public function sayHello() { echo “Hello!”; } } “` 通过上述示例,我们可以看出,使用 public 关键字可以将类、属性和方法声明为公共的,从而使其可以被其他代码访问和使用。在编写 PHP 代码时,根据需要将类、属性和方法声明为 public、private 或 protected,可以有效地控制代码的可访问性和可见性,提高代码的...
<?php error_reporting(E_ALL); classtest{ public$public; private$private; protected$protected; static$instance; publicfunction __construct(){ $this->public='public '; $this->private='private '; $this->protected='protected '; } staticfunction ...
<?php error_reporting(E_ALL); class test{ public $public; private $private; protected $protected; static $instance; public function __construct(){ $this->public = 'public '; $this->private = 'private '; $this->protected = 'protected '; } static function...
在PHP中,类的属性(也称为成员变量)可以使用public修饰符来定义。public属性可以在类的内部和外部直接访问。 示例1:定义和使用public属性 classPerson{public$name;// 定义一个public属性publicfunction__construct($name){$this->name =$name;// 在构造函数中初始化属性} ...
php <?php class cstudent { // 定义public属性 public $id; public $name; // 定义private属性 private $age; // 构造函数,用于初始化对象 public function __construct($id, $name, $age) { $this->id = $id; $this->name = $name; $this->age = $age; } // 获取private属...
phpclasstest4{public$public;private$private;protected$protected;static$instance;publicfunction__construct(){$this->public='public ';$this->private='private ';$this->protected='protected ';}protectedfunctiontank(){//私有方法不能继承,换成public,protectedif(!isset(self::$instance[get_class()]))...