arianasu

Its ok I found out how to do it. For other newbies…once you have made your child theme create a folder within that using your text editor named functions.php and add the code below with <?php at top line. (I dont know if you need to add the extra parts above and below the code every time you add a new function or if the functions always get added within the existing ones as this is the first function i have added to my child theme).

<?php

/* custom PHP functions below this line */
// Hide standard shipping option when free shipping is available
add_filter( ‘woocommerce_available_shipping_methods’, ‘hide_standard_shipping_when_free_is_available’ , 10, 1 );

/**
* Hide Standard Shipping option when free shipping is available
*
* @param array $available_methods
*/
function hide_standard_shipping_when_free_is_available( $available_methods ) {

if( isset( $available_methods[‘free_shipping’] ) AND isset( $available_methods[‘flat_rate’] ) ) {

// remove standard shipping option
unset( $available_methods[‘flat_rate’] );
}

return $available_methods;
}
?>