PHP抽象类数组保护属性
我对使用抽象类和OOP有点陌生，所以请耐心听我说。PHP抽象类数组保护属性,php,arrays,oop,properties,abstract-class,Php,Arrays,Oop,Properties,Abstract Class,我对使用抽象类和OOP有点陌生，所以请耐心听我说。 我正试图列出员工和客户的列表，但在打印StoreList类中的对象数组时遇到了一些问题，因为它们都受到保护。 我要做的是将storeArray中的值打印到一个漂亮的列表中。 现在，它从抽象类中打印出GET中的所有内容，使数组过时。 我将在下面列出所有代码，但由于代码很长，我想在这里提问。 这是当我将数组转储到index.php或Storelistclass.php上时数组发出的结果 array (size=5) 0 => o
我正试图列出员工和客户的列表，但在打印StoreList类中的对象数组时遇到了一些问题，因为它们都受到保护。
我要做的是将storeArray中的值打印到一个漂亮的列表中。
现在，它从抽象类中打印出GET中的所有内容，使数组过时。
我将在下面列出所有代码，但由于代码很长，我想在这里提问。
这是当我将数组转储到index.php或Storelistclass.php上时数组发出的结果
array (size=5)
0 =>
object(Employee)[1]
protected 'userId' => string '1' (length=1)
protected 'userFirstName' => string 'Joe' (length=3)
protected 'userLastName' => string 'Longo' (length=5)
protected 'userTitle' => string 'Employee' (length=8)
1 =>
object(Customer)[2]
protected 'userId' => string '1' (length=1)
protected 'userFirstName' => string 'Bruce' (length=5)
protected 'userLastName' => string 'Stark' (length=5)
protected 'userTitle' => string 'Customer' (length=8)
2 =>
object(Customer)[3]
protected 'userId' => string '2' (length=1)
protected 'userFirstName' => string 'Tony' (length=4)
protected 'userLastName' => string 'Wayne' (length=5)
protected 'userTitle' => string 'Customer' (length=8)
3 =>
object(Customer)[4]
protected 'userId' => string '3' (length=1)
protected 'userFirstName' => string 'Oliver' (length=6)
protected 'userLastName' => string 'Wilson' (length=6)
protected 'userTitle' => string 'Customer' (length=8)
4 =>
object(Customer)[5]
protected 'userId' => string '4' (length=1)
protected 'userFirstName' => string 'Slade' (length=5)
protected 'userLastName' => string 'Queen' (length=5)
protected 'userTitle' => string 'Customer' (length=8)
foreach($this->storeArray as $data)
{
echo $data->userFirstName;
}
对不起，如果这是一个愚蠢的问题，但我真的试图把我的头围绕在这个问题上，但失败了 任何帮助和提示（也包括更新和删除功能）都将不胜感激 这是我现在所有的代码。
index.php:
<?php
include("classes/Userclass.php");
include("classes/Customerclass.php");
include("classes/Employeeclass.php");
include("classes/Storelistclass.php");
$employeeOne = new Employee("1","Joe","Longo","Employee");
$customerOne = new Customer("1","Bruce","Stark","Customer");
$customerTwo = new Customer("2","Tony","Wayne","Customer");
$customerThree = new Customer("3","Oliver","Wilson","Customer");
$customerFour = new Customer("4","Slade","Queen","Customer");
$list = new Storelist($employeeOne);
$list->addCustomer($customerOne);
$list->addCustomer($customerTwo);
$list->addCustomer($customerThree);
$list->addCustomer($customerFour);
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<!--<link href="includes/stylesheet.css" rel="stylesheet" type="text/css"/>-->
<title>Store List</title>
</head>
<body>
<h1>Test Get Customer</h1>
<p>
<?php
echo $customerOne->getUserTitle()." #". $customerOne->getUserId() ."'s First name is ". $customerOne->getUserFirstName() ." and Last name is ". $customerOne->getUserLastName() ."<br/>";
echo $customerTwo->getUserTitle()." #". $customerTwo->getUserId() ."'s First name is ". $customerTwo->getUserFirstName() ." and Last name is ". $customerTwo->getUserLastName() ."<br/>";
?>
</p>
<h1>Test Get Employee</h1>
<p>
<?php
echo $employeeOne->getUserTitle()." #". $employeeOne->getUserId() ."'s First name is ". $employeeOne->getUserFirstName() ." and Last name is ". $employeeOne->getUserLastName() ."<br/>";
?>
</p>
<h1>Storelist Foreach</h1>
<p>
<?php
$listtest = $list->buildList();
echo $listtest;
?>
</p>
<?php
class Employee extends User
{
public function userSayHi()
{
return 'Hello , how may i help u?';
}
}
<?php
include("classes/Userclass.php");
include("classes/Customerclass.php");
include("classes/Employeeclass.php");
include("classes/Storelistclass.php");
$employeeOne = new Employee("1","Joe","Longo","Employee");
$customerOne = new Customer("1","Bruce","Stark","Customer");
$customerTwo = new Customer("2","Tony","Wayne","Customer");
$customerThree = new Customer("3","Oliver","Wilson","Customer");
$customerFour = new Customer("4","Slade","Queen","Customer");
$list = new Storelist($employeeOne);
$list->addCustomer($customerOne);
$list->addCustomer($customerTwo);
$list->addCustomer($customerThree);
$list->addCustomer($customerFour);
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<!--<link href="includes/stylesheet.css" rel="stylesheet" type="text/css"/>-->
<title>Store List</title>
</head>
<body>
<h1>Test Get Customer</h1>
<p>
<?php
echo $customerOne->getUserTitle()." #". $customerOne->getUserId() ."'s First name is ". $customerOne->getUserFirstName() ." and Last name is ". $customerOne->getUserLastName() ."<br/>";
echo $customerTwo->getUserTitle()." #". $customerTwo->getUserId() ."'s First name is ". $customerTwo->getUserFirstName() ." and Last name is ". $customerTwo->getUserLastName() ."<br/>";
?>
</p>
<h1>Test Get Employee</h1>
<p>
<?php
echo $employeeOne->getUserTitle()." #". $employeeOne->getUserId() ."'s First name is ". $employeeOne->getUserFirstName() ." and Last name is ". $employeeOne->getUserLastName() ."<br/>";
?>
</p>
<h1>Storelist Foreach</h1>
<p>
<?php
$listtest = $list->buildList();
echo $listtest;
?>
</p>
<?php
class Employee extends User
{
public function userSayHi()
{
return 'Hello , how may i help u?';
}
}
解决方案是实际使用getter方法（getuserwhatch（）
），您在定义时遇到了麻烦。通过使用protected
visibility使它们保持原样，除了使用您定义的setuserwhather（）
方法之外，不可能修改它们，因此您可以执行其他验证（例如，防止非空值）并对无效数据抛出异常。因此，它们不能像public
属性那样从类外直接可变是很有用的
在Storelist
类中，您已经定义了具有public
可见性的$storeArray
属性，这意味着您可以在index.php
中的类外读取它。由于要将员工
或客户
对象添加到该数组中，因此这些对象仍然可以通过$list->storeArray
上的数组键单独寻址。例如，要修改姓氏，可以使用
// Set the 3rd user's last name
$list->storeArray[2]->setUserLastName('Jones');
同样，在Storelist
类中使用$this
也可以实现这一点：
// Inside Storelist
$this->storeArray[2]->setUserLastName('Jones');
因此，您已经基本上了解了这些类的布局。还有一件事我可以建议；由于您已经创建了使用方法调用将Customer
或Employee
对象添加到Storelist:：$storeArray
的方法，而不是直接修改数组：
// You're doing this:
$list = new Storelist($employeeOne);
$list->addCustomer($customerOne);
// And not this (directly modifying storeArray):
$list = new Storelist($employeeOne);
$list->storeArray[] = $customerOne
……同时也考虑定义<代码> Stulelist:：$StururRie<代码>作为<代码>受保护的属性，以便您只能用它的SETTER方法写入它。然后还需要创建一个返回数组的getter方法
class Storelist
{
// This becomes protected
protected $storeArray = [];
// So you need a getter:
public function getStoreArray()
{
return $this->storeArray;
}
// etc...
}
若要从index.php
修改数组，则不能再直接读取其元素。而是将其称为getter方法：
// You can't do this:
$list->storeArray[2]->setUserLastName('Jones');
// Instead do it via the getter:
$list->getStoreArray()[2]->setUserLastName('Jones');
（注意，上面的（）[2]
语法需要PHP5.4+在Storelistclass.PHP
文件中，当前有两个版本的循环。注释掉的循环不起作用，但未注释的循环就可以了。通过它们的publicgetuserwhicher（）
方法调用这些属性正是您应该做的，而不是修改底层的抽象用户
使它们成为publicbuildList（）update（）/delete（）delete（）setUserWhather（）// You can't do this:
$list->storeArray[2]->setUserLastName('Jones');
// Instead do it via the getter:
$list->getStoreArray()[2]->setUserLastName('Jones');