php PHP函数返回字符串
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PHP Function to return string
提问by TheBlackBenzKid
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:
我对 PHP 相当陌生。我有一个检查价格成本的功能。我想从此函数返回变量以供全局使用：
<?
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
?>
回答by Jon
You should simply store the return value in a variable:
您应该简单地将返回值存储在一个变量中：
$deliveryPrice = getDeliveryPrice(12);
echo $deliveryPrice; // will print 20
The $deliveryPricevariable above is a differentvariable than the $deliveryPriceinside the function. The latter is not visible outside the function because of variable scope.
在$deliveryPrice上述变量是一个不同的比可变$deliveryPrice的内部的功能。由于变量范围的原因，后者在函数外部不可见。
回答by Bgi
<?
function getDeliveryPrice($qew){
if ($qew=="1"){
$deliveryPrice="60";
} else {
$deliveryPrice="20";
}
return $deliveryPrice;
}
$price = getDeliveryPrice(12);
echo $price;
?>
回答by Mansoorkhan Cherupuzha
<?php
function getDeliveryPrice($qew){
global $deliveryPrice;
if ($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
?>
回答by Peon
As some alrady said, try using classes for this.
正如一些人所说，尝试为此使用类。
class myClass
{
private $delivery_price;
public function setDeliveryPrice($qew = 0)
{
if ($qew == "1") {
$this->delivery_price = "60";
} else {
$this->delivery_price = "20";
}
}
public function getDeliveryPrice()
{
return $this->delivery_price;
}
}
Now, to use it, just initialize the class and do what you need:
现在，要使用它，只需初始化类并执行您需要的操作：
$myClass = new myClass();
$myClass->setDeliveryPrice(1);
echo $myClass->getDeliveryPrice();
