WordPress at a glance
filter is not described

woocommerce_email_title filter-hook . WC 1.0

Return the email's title

Usage

add_filter( 'woocommerce_email_title', 'filter_function_name_7593', 10, 2 );
function filter_function_name_7593( $title, $that ){
	// filter...

	return $title;
}
$title
-
$that
-

Where the hook is called

WC_Email::get_title()
woocommerce_email_title
woocommerce/includes/emails/class-wc-email.php 470
return apply_filters( 'woocommerce_email_title', $this->title, $this );

Where in WP core the hook is used WooCommerce

Usage not found.