CODEWITHSUNDEEP
phpwordpress
Jenny
Jenny

Reputation: 1727

Call a function outside a class

This is a part of code that involved in my question:

class My_Box {
  function __construct( $args ) {
    add_action( 'admin_footer', array( __CLASS__, 'add_templates' ) );
  }
  static function add_templates() {
    self::add_template( 'list' );
    self::add_template( 'grid' );
  }
  private static function add_template( $name ) {
    echo html('script',array( /*args*/));
  }
}

The add_action in the above code requires the arguments to be string like this:

add_action('handle','function_name');

Now I need to run the add_action statement outside the class, I figured something like this:

add_action( 'wp_footer', My_Box::add_templates() );

This statement got a debug message of "Notice: Undefined offset: 0 ".

How to code this add_action statement correctly?

Upvotes: 0

Views: 1092

Answers (3)

Nirmal Ram
Nirmal Ram

Reputation: 1732

Checkout this http://codex.wordpress.org/Function_Reference/add_action#Using_add_action_with_a_class

To use the add_action hook when your plugin or theme is built up using classes, add $this to your add_action call together with the function name within that class, like so:

class MyPluginClass
{
    public function __construct()
    {
         //add your actions to the constructor!
         add_action( 'save_post', array( $this, 'myplugin_save_posts' ) );
    }

    public function myplugin_save_posts()
    {
         //do stuff here...
    }
}

Upvotes: 0

FoolishSeth
FoolishSeth

Reputation: 4021

The array you are passing as the second argument to add_action is a callback. The first value in the array is the class name and the second is the name of a static method on that class. Within a class __CLASS__ will contain the name of that class. So to make this same call elsewhere you just need to replace that with the actual class name, e.g.

add_action( 'wp_footer', array('My_Box', 'add_templates' );

For more info on how callbacks are defined see: http://www.php.net/manual/en/language.types.callable.php

Upvotes: 0

Rakesh Sharma
Rakesh Sharma

Reputation: 13728

for fetching in class

add_action('handle', array(get_class(), 'function_name'));

outside of class

add_action('handle', array('class_name', 'func_name'));

Upvotes: 1

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