PHP 在其他类中包含类
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PHP include class in other class
提问by Code Lover
I am learning OOP and very confuse to use classes for each other.
我正在学习面向对象编程，并且非常困惑彼此使用类。
I am having total 3 classes
我总共有 3 节课
//CMS System class
class cont_output extends cont_stacks
{
//all methods to render the output
}
//CMS System class
class process
{
//all process with system and db
}
// My own class to extends the system like plugin
class template_functions
{
//here I am using all template functions
//where some of used db query
}
Now I want to use my own class template_functions withing both system classes. But very confused how to use it. Please help me to understand this.
现在我想在两个系统类中使用我自己的类 template_functions。但是很迷茫怎么用。请帮助我理解这一点。
EDIT: I am sorry champs I forgot to mention that my own class in different PHP file.
编辑：对不起，我忘了在不同的 PHP 文件中提到我自己的类。
回答by hek2mgl
First, make sure, that you includethe class file before using it:
首先，请确保include在使用类文件之前使用它：
include_once 'path/to/tpl_functions.php';
This should be done either in your index.php or on top of the class which uses tpl_function. Also note the possibility of autoloadingclasses:
这应该在您的 index.php 中或在使用tpl_function. 还要注意autoloading类的可能性：
Since PHP5 you have to possibility to autoload classes. This means you register a hook function that is been called everytime when you try to use a class which's code file hasn't been included yet. Doing it you won't need to have include_oncestatements in every class file. Here comes an example:
从 PHP5 开始，您必须能够自动加载类。这意味着您注册了一个钩子函数，当您尝试使用尚未包含其代码文件的类时，每次都会调用该函数。这样做你不需要include_once在每个类文件中都有语句。下面是一个例子：
index.phpor whatever application entry point:
index.php或任何应用程序入口点：
spl_autoload_register('autoloader');
function autoloader($classname) {
include_once 'path/to/class.files/' . $classname . '.php';
}
From now on you can access the classes without to worry about including the code files anymore. Try it:
从现在开始，您可以访问这些类而不必再担心包含代码文件了。尝试一下：
$process = new process();
Knowing this, there are several ways how you can use the template_functionsclass
知道了这一点，有几种方法可以使用template_functions该类
Just use it:
只需使用它：
You can access the class in any part of the code if you create an instance of it:
如果创建它的实例，则可以在代码的任何部分访问该类：
class process
{
//all process with system and db
public function doSomethging() {
// create instance and use it
$tplFunctions = new template_functions();
$tplFunctions->doSomethingElse();
}
}
Instance members:
实例成员：
Take the process class for example. To make the template_functions available inside the processclass, you create an instance member and initialize it somewhere, where you need it, the constructor seems to be a good place:
以进程类为例。为了使类中的 template_functions 可用process，您创建一个实例成员并在需要它的地方初始化它，构造函数似乎是一个好地方：
//CMS System class
class process
{
//all process with system and db
// declare instance var
protected tplFunctions;
public function __construct() {
$this->tplFunctions = new template_functions;
}
// use the member :
public function doSomething() {
$this->tplFunctions->doSomething();
}
public function doSomethingElse() {
$this->tplFunctions->doSomethingElse();
}
}
回答by Tim
You can extend the template_functionsclass, then you can use all the functions.
您可以扩展template_functions该类，然后您可以使用所有功能。
class cont_output extends cont_stacks //cont_stacks has to extend template_functions
{
public function test() {
$this->render();
}
}
class process extends template_functions
{
public function test() {
$this->render();
}
}
class template_functions
{
public function render() {
echo "Works!";
}
}
