<html>
<head>
<title>编写一个带返回值的PHP函数</title>
</head>
<body>
<?php
function addFunction($num1, $num2) {
$sum = $num1 + $num2;
return $sum;
}
$return_value = addFunction(10, 20);
echo "从函数返回的值 : $return_value";
?>
</body>
</html>
