woocommerce_email_headers │ filter-hook │ WC 3.0.0

Filter the headers of the low stock notification email.

Usage

add_filter( 'woocommerce_email_headers', 'wp_kama_woocommerce_email_headers_filter', 10, 3 );

/**
 * Function for `woocommerce_email_headers` filter-hook.
 * 
 * @param string     $headers The email headers.
 * @param WC_Product $product Product instance.
 * @param            $null    
 *
 * @return string
 */
function wp_kama_woocommerce_email_headers_filter( $headers, $product, $null ){

	// filter...
	return $headers;
}

$headers(string)

The email headers.

$product(WC_Product)

Product instance.

$null

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Changelog

Where the hook is called

apply_filters( 'woocommerce_email_headers', '', 'low_stock', $product, null ),

return apply_filters( 'woocommerce_email_headers', $header, $this->id, $this->object, $this );

apply_filters( 'woocommerce_email_headers', '', 'no_stock', $product, null ),

apply_filters( 'woocommerce_email_headers', '', 'backorder', $args, null ),

Where the hook is used in WooCommerce