Add Prefix To Woocommerce Price

prefix-price.php

add_filter( 'woocommerce_get_price_html', 'woo_prefix_text', 100, 2 );
 
function woo_prefix_text( $price, $product ){
/* Change FROM word to any text you want */
    $price = 'FROM ' . $price ;
    return apply_filters( 'woocommerce_get_price', $price );
}