WordPress at a glance
filter is not described

woocommerce_email_content_type filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_email_content_type', 'filter_function_name_7463', 10, 3 );
function filter_function_name_7463( $content_type, $that, $default_content_type ){
	// filter...

	return $content_type;
}
$content_type
-
$that
-
$default_content_type
-

Where the hook is called

WC_Email::get_content_type()
woocommerce_email_content_type
woocommerce/includes/emails/class-wc-email.php 461
return apply_filters( 'woocommerce_email_content_type', $content_type, $this, $default_content_type );

Where in WP core the hook is used WooCommerce

Usage not found.