来自另一个文件的呼叫功能

Question

我需要getdata()函数class-GetData.php在此shortcode_function()内部调用。

require_once plugin_dir_path(__FILE__) . '/class-GetData.php'; 

add_shortcode('registration-plugin','shortcode_function');  
function shortcode_function() 
{ 
    ob_start(); 
    insert_data(); 
    getdata(); //from GetData.php 
    return ob_get_clean(); 
} 
?> 

类访问getdata.php

<?php 

    class GetData 
    { 
     public function getdata() 
     { 
      //something here 
     } 
    } 

    $getData = new GetData(); 

但我正在逐渐未定义功能错误：

Call to undefined function getdata()

Answer 1

使用的GetData类的对象调用的类创建的功能。

require_once plugin_dir_path(__FILE__) . '/class-GetData.php'; 

add_shortcode('registration-plugin','shortcode_function');  
function shortcode_function() 
{ 
    ob_start(); 
    insert_data(); 
    $getData = new GetData(); //Create Getdata object 
    $getData->getdata(); //call function using the object 
    return ob_get_clean(); 
} 

类访问getdata.php

class GetData 
{ 
    public function getdata() 
    { 
     //something here 
    } 
} 

Answer 2

要调用Class Method像正常的函数调用。内部Class Method需要this关键字来调用一个类中的方法。如果您想从班级以外拨打Public功能/方法，您必须创建一个Object。

Try to use -

function shortcode_function(){ 
    ob_start(); 
    insert_data(); 
    $getData = new GetData(); #Create an Object 
    $getData->getdata();  #Call method using Object 
    return ob_get_clean(); 
} 

Example :

class GetData{ 
    public function getdata() { 
     //something here 
    } 

    public function TestMethod(){ 
     $this->getdata(); #Calling Function From Inner Class 
    } 
} 

$getData = new GetData(); #Creating Object 
$getData->getdata();  #Calling Public Function from Outer Class 

Here is the explanation for Private,Public and Protected