calling public function from another php

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I’m working on WordPress plugin where I have 2 php files.

class.php has code as:

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class Plugin_Name {

     public function say_hello() {
         echo "Hello";
     }

}

Now I want to call this say_hello() function from another welcome.php file.

I tried 

$hello_function = new Plugin_Name();
$hello_function->say_hello();

But it doesn’t work. Is there any way to call public function from another php ?

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1 comment

  1. You need to include the first function in the other file, that way the other file knows the code is there. At the top of welcome.php add 

    require_once('/path/to/class.php');
$hello_function = new Plugin_Name();
$hello_function->say_hello();