misc_helper

I would suggest using something like the example below. The function returns the wanted data (a string containing the suggesting price) if it exists, otherwise it will return false. I rename the function from display_ to get_ to reflect the action of the function, it gets the data so you can use it (not display it immediately as the display_ naming would suggest).

PHP Code:

function get_suggested_price( $oprice, $user_no ) {

    if( !empty( $oprice ) ) {

        $prices = self::get_available_prices( $oprice, $user_no );

        if( $prices[ 'charge_out' ] > 0 ) {

            return CURRENCY.number_format( $prices[ 'charge_out' ], 2 );        

        }

    }

    return FALSE;

}