<?php function calcSalesTax($price, $tax = "") { $total = $price + $price * $tax; echo "Total cost: {$total}"; } calcSalesTax(42.0);
<?php function calcSalesTax($price, $tax = 0.0675) { $total = $price + $price * $tax; echo "Total cost: {$total}"; } $price = 15.47; calcSalesTax($price);
<?php function calcSalesTax($price, $tax) { $total = $price + $price * $tax; echo "Total cost: {$total}"; } calcSalesTax(15.0, 0.075);