woocommerce_generate_invoice_number

The WooCommerce PDF Invoices & Packing Slips woocommerce generate invoice number hook.

Description

apply_filters( 'woocommerce_generate_invoice_number', (null) $null, (unknown) $order ); 

Parameters (2)

0. $null (null) => null
The null.
1. $order (unknown)
The order.

Usage

To run the hook, copy the example below.
  1. $null = apply_filters( 'woocommerce_generate_invoice_number', $null, $order ); 
  2.  
  3. if ( !empty( $null ) ) { 
  4.  
  5. // everything has led up to this point... 
  6.  
  7.  
The following example is for adding a hook callback.
  1. // define the woocommerce_generate_invoice_number callback 
  2. function filter_woocommerce_generate_invoice_number( $null, $order ) { 
  3. // make filter magic happen here... 
  4. return $null
  5. }; 
  6.  
  7. // add the filter 
  8. add_filter( 'woocommerce_generate_invoice_number', 'filter_woocommerce_generate_invoice_number', 10, 2 ); 
To remove a hook callback, use the example below.
  1. // remove the filter 
  2. remove_filter( 'woocommerce_generate_invoice_number', 'filter_woocommerce_generate_invoice_number', 10, 2 ); 

Defined (1)

The filter is defined in the following location(s).

/includes/class-wcpdf-export.php  
  1. $invoice_number = apply_filters('woocommerce_generate_invoice_number', null, $order);