php PHP调用类方法/函数
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PHP call Class method / function
提问by conmen
How can I call following Class method or function?
如何调用以下类方法或函数？
Let say I have this params get from url:
假设我有从 url 获取的参数：
$var = filter($_GET['params']);
Class:
班级：
class Functions{
public function filter($data){
$data = trim(htmlentities(strip_tags($data)));
if(get_magic_quotes_gpc())
$data = stripslashes($data);
$data = mysql_real_escape_string($data);
return $data;
}
}
thanks.
谢谢。
回答by UnholyRanger
To answer your question, the current method would be to create the object then call the method:
要回答您的问题，当前的方法是创建对象然后调用该方法：
$functions = new Functions();
$var = $functions->filter($_GET['params']);
Another way would be to make the method staticsince the class has no private data to rely on:
另一种方法是创建该方法，static因为该类没有可依赖的私有数据：
public static function filter($data){
This can then be called like so:
然后可以这样调用：
$var = Functions::filter($_GET['params']);
Lastly, you do not need a class and can just have a file of functions which you include. So you remove the class Functionsand the publicin the method. This can then be called like you tried:
最后，您不需要类，只需包含一个包含函数的文件即可。所以你删除了方法中的class Functions和public。然后可以像您尝试的那样调用它：
$var = filter($_GET['params']);
回答by sandip
Within the class you can call function by using :
在类中，您可以使用以下方法调用函数：
$this->filter();
Outside of the class
课外
you have to create an object of a class
你必须创建一个类的对象
ex: $obj = new Functions();
$obj->filter($param);
for more about OOPsin php
thisexample:
这个例子：
class test {
public function newTest(){
$this->bigTest();// we don't need to create an object we can call simply using $this
$this->smallTest();
}
private function bigTest(){
//Big Test Here
}
private function smallTest(){
//Small Test Here
}
public function scoreTest(){
//Scoring code here;
}
}
$testObject = new test();
$testObject->newTest();
$testObject->scoreTest();
hope it will help!
希望它会有所帮助！
回答by Edwin Alex
Create object for the class and call, if you want to call it from other pages.
如果要从其他页面调用它，请为该类创建对象并调用。
$obj = new Functions();
$var = $obj->filter($_GET['params']);
Or inside the same class instances [ methods ], try this.
或者在同一个类实例[方法]中，试试这个。
$var = $this->filter($_GET['params']);
回答by dnagirl
$f = new Functions;
$var = $f->filter($_GET['params']);
Have a look at the PHP manual section on Object Oriented programming
看一看面向对象编程的 PHP 手册部分
回答by MatRt
As th function is not using $thisat all, you can add a statickeyword just after public and then call
由于 th 函数根本没有使用$this，您可以static在 public 之后添加一个关键字，然后调用
Functions::filter($_GET['params']);
Avoiding the creation of an object just for one method call
避免只为一个方法调用创建一个对象
回答by Ihsan
This way:
这边走：
$instance = new Functions(); // create an instance (object) of functions class
$instance->filter($data); // now call it
回答by Dipesh Parmar
You need to create Objectfor the class.
您需要Object为class.
$obj = new Functions();
$var = $obj->filter($_GET['params']);
