How do you implement shortcode using PHP and wordpress using object-oriented programming?

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I am trying to build a plugin using PHP OOP, and I cannot seem to get this 1st step working. Is there a problem with this code? When I put the shortcode [rsb-archive] into a wordpress page, all it doesn’t work.

This is the code:

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class RSB_Archive {
    public function __construct()
    {
        add_shortcode('rsb-archive', array($this, 'shortcode'));
    }

    public function shortcode()
    {
           // Contents of this function will execute when the blogger
          // uses the [rsb-archive] shortcode.

          echo "print this code";



    }
}

That does not seem to work. Any ideas?

Additionally, does anyone have any insight on how to debug code using PHP. I am just beginning to learn how to use it.

Thanks!

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2 comments

  1. You have to create an instance of the widget object first.

    like so;

    <?php

class RSB_Archive {

    public function __construct() {
       // don't call add_shortcode here
       // actually, I worked with wordpress last year and
       // i think this is a good place to call add_shortcode 
       // (and all other filters) now...
    }

    public function shortcode() {
        echo 'doTheDoo';
    }
}

$myWidged = new RSB_Archive();

add_shortcode('my-code', array($myWidget, 'shortcode'));

?>

    This has been answered more thoroughly

  2. You forgot to create the instance of the class RSB_Archive.
    the codes inside the constructor runs while create the object. 

    class RSB_Archive {

public function __construct()
{
    add_shortcode('rsb-archive', array($this, 'shortcode'));
}

public function shortcode()
{
       // Contents of this function will execute when the blogger
      // uses the [rsb-archive] shortcode.

      echo "print this code";



   }
}

$obj = new RSB_Archive();