PHP函数返回字符串 [英] PHP Function to return string

问题描述

我对PHP相当陌生。我有一个检查价格成本的功能。我想从这个函数中返回这个变量来全局使用：

I am fairly new to PHP. I have a function which checks the cost of price. I want to return the variable from this function to be used globally:

<?
function getDeliveryPrice($qew){
    if ($qew=="1"){
        $deliveryPrice="60";
    } else {
        $deliveryPrice="20";
    }
    return $deliveryPrice;                          
}
// Assuming these two next lines are on external pages..
getDeliveryPrice(12);
echo $deliveryPrice; // It should return 20

?>

推荐答案

您应该将返回值存储在一个变量中：

You should simply store the return value in a variable:

$deliveryPrice = getDeliveryPrice(12);
echo $deliveryPrice; // will print 20

$ deliveryPrice 上面的变量是函数内部的不同的变量，而不是 $ deliveryPrice 。由于变量范围，后者在函数外部不可见。

The $deliveryPrice variable above is a different variable than the $deliveryPrice inside the function. The latter is not visible outside the function because of variable scope.

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