woocommerce_email_subject_backorder filter-hookWC 1.0

Usage

add_filter( 'woocommerce_email_subject_backorder', 'wp_kama_woocommerce_email_subject_backorder_filter', 10, 3 );

/**
 * Function for `woocommerce_email_subject_backorder` filter-hook.
 * 
 * @param  $subject 
 * @param  $args    
 * @param  $null    
 *
 * @return 
 */
function wp_kama_woocommerce_email_subject_backorder_filter( $subject, $args, $null ){

	// filter...
	return $subject;
}
$subject
-
$args
-
$null
-

Where the hook is called

WC_Emails::backorder()
woocommerce_email_subject_backorder
woocommerce/includes/class-wc-emails.php 777
apply_filters( 'woocommerce_email_subject_backorder', $subject, $args, null ),

Where the hook is used in WooCommerce

Usage not found.