woocommerce_sale_flash │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_sale_flash', 'wp_kama_woocommerce_sale_flash_filter', 10, 3 );

/**
 * Function for `woocommerce_sale_flash` filter-hook.
 * 
 * @param  $html    
 * @param  $post    
 * @param  $product 
 *
 * @return 
 */
function wp_kama_woocommerce_sale_flash_filter( $html, $post, $product ){

	// filter...
	return $html;
}

$html

-

$post

-

$product

-

Where the hook is called

<?php echo apply_filters( 'woocommerce_sale_flash', '<span class="onsale">' . esc_html__( 'Sale!', 'woocommerce' ) . '</span>', $post, $product ); ?>

<?php echo apply_filters( 'woocommerce_sale_flash', '<span class="onsale">' . esc_html__( 'Sale!', 'woocommerce' ) . '</span>', $post, $product ); ?>

Where the hook is used in WooCommerce