Combine these basic php functions
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I need to add these two php functions `<?php the_field('city'); ?>` and `<?php the_field('country'); ?>` into the function below in place of the `$city` and `$country` variables.

    <?php echo do_shortcode('[forecast location="' . $city . ' , ' . $country. '" caption="" numdays="3" iconset="Cartoon" class="css_table_class" cache="true"]'); ?>

Would appreciate any help my PHP isn't very good at all and I keep getting erros.

Thanks