Title: Repeating a function from another plugin.
Last modified: August 24, 2016

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# Repeating a function from another plugin.

 *  [Lsnewton](https://wordpress.org/support/users/lsnewton/)
 * (@lsnewton)
 * [11 years ago](https://wordpress.org/support/topic/repeating-a-function-from-another-plugin/)
 * I have a WooCommerce/Gravity Form plugin that uses the following line to add 
   an options metabox to the editor page of a WooCommerce product:
 * `add_meta_box( 'woocommerce-gravityforms-meta', __( 'Gravity Forms Product Add-
   Ons', 'wc_gf_addons' ), array($this, 'new_meta_box'), 'products', 'normal', '
   default' );`
 * I’ve added other custom post types that are now recognised as products by WooCommerce,
   and I’d like that metabox to be displayed for them as well. I can achieve this
   if I edit the plugin and duplicate that line, swapping the ‘products’ value for
   the name of the custom post type (E.g. ‘Speakers):
 * `add_meta_box( 'woocommerce-gravityforms-meta', __( 'Gravity Forms Product Add-
   Ons', 'wc_gf_addons' ), array($this, 'new_meta_box'), 'speakers', 'normal', '
   default' );`
 * This, however, would obviously break as soon as the plugin updated, so I’d like
   to write a new plugin that just extends it to add that metabox onto the new post
   types.
 * How could I go about doing that? I’ve tried to just use that new line in the 
   plugin and call the original plugin with require_once, but that doesn’t seem 
   to have any effect.

Viewing 3 replies - 1 through 3 (of 3 total)

 *  [catacaustic](https://wordpress.org/support/users/catacaustic/)
 * (@catacaustic)
 * [11 years ago](https://wordpress.org/support/topic/repeating-a-function-from-another-plugin/#post-6063799)
 * You can do that easily. You would need this sort of thing in your plugins code.
 * BUT.. You will need to have a reference to the object that’s being used by the
   existing functions. Where the existing call uses `$this`, that’s where you’ll
   need to actual object that’s being used. That could be the tricky part of tracking
   that down.
 * For this example, I’ll assume that the object is stored in a variable called `
   $wc_gf_object`.
 *     ```
       add_action ('add_meta_boxes'. 'my_metabox_function', 100);
   
       function my_metabox_function () {
           add_meta_box( 'woocommerce-gravityforms-meta', __( 'Gravity Forms Product Add-Ons', 'wc_gf_addons' ), array($wc_gf_object, 'new_meta_box'), 'speakers', 'normal', 'default' );
           add_meta_box( 'woocommerce-gravityforms-meta', __( 'Gravity Forms Product Add-Ons', 'wc_gf_addons' ), array($wc_gf_object, 'new_meta_box'), 'second_product_type', 'normal', 'default' );
           ...
       }
       ```
   
 * Using that you could add in as many product types as you need to like this.
 *  Thread Starter [Lsnewton](https://wordpress.org/support/users/lsnewton/)
 * (@lsnewton)
 * [11 years ago](https://wordpress.org/support/topic/repeating-a-function-from-another-plugin/#post-6063814)
 * Is there some variation of print($this) that I could slip into the original plugin’s
   function temporarily that would tell me the name?
 *  [catacaustic](https://wordpress.org/support/users/catacaustic/)
 * (@catacaustic)
 * [11 years ago](https://wordpress.org/support/topic/repeating-a-function-from-another-plugin/#post-6063815)
 * Not that I know of. The reason is that the object itself doesn’t know what name
   it’s stored under. If it was me, I’d be looking for something that was creating
   a new object of the class name that you’ve got that original code out of. As 
   an example…
 * `class Woocommerce_GFormClass {`
 * That’s what the class name would be, so I’d search for
 * `new Woocommerce_GFormClass`
 * And see what came up. That should show you where the object is being created,
   and that will give you the variables name like this…
 * `$my_var = new Wooconnerce_GFormClass( 'param' );`

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Repeating a function from another plugin.’ is closed to new replies.

## Tags

 * [metabox](https://wordpress.org/support/topic-tag/metabox/)

 * In: [Hacks](https://wordpress.org/support/forum/plugins-and-hacks/hacks/)
 * 3 replies
 * 2 participants
 * Last reply from: [catacaustic](https://wordpress.org/support/users/catacaustic/)
 * Last activity: [11 years ago](https://wordpress.org/support/topic/repeating-a-function-from-another-plugin/#post-6063815)
 * Status: not resolved

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