PHP getter方法问题

Question

嗨,我是PHP新手,请原谅这个问题的基本性质.

我有一个类:"CustomerInfo.php",我将其包含在另一个类中.然后我尝试使用定义的setter方法设置CustomerInfo对象的变量,并尝试使用getter方法回显该变量.问题是吸气剂不起作用.但是,如果我直接访问变量,我可以回显该值.我糊涂了....

    <?php
class CustomerInfo
{

    public $cust_AptNum;



    public function _construct()
    {
        echo"Creating new CustomerInfo instance<br/>";
        $this->cust_AptNum = "";

    }

    public function setAptNum($apt_num)
    {
        $this->cust_AptNum = $apt_num;
    }

    public function getAptNum()
    {
        return $this->cust_AptNum;
    }


}
?>

---

<?php

include ('CustomerInfo.php');
$CustomerInfoObj = new CustomerInfo();

$CustomerInfoObj->setAptNum("22");
//The line below doesn't output anything
echo "CustomerAptNo = $CustomerInfoObj->getAptNum()<br/>";
//This line outputs the value that was set
echo "CustomerAptNo = $CustomerInfoObj->cust_AptNum<br/>";
?>

Answer 1

尝试

echo 'CustomerAptNo = ' . $CustomerInfoObj->getAptNum() . '<br/>';

或者您需要将方法调用放在"复杂(卷曲)语法"中

echo "CustomerAptNo = {$CustomerInfoObj->getAptNum()} <br/>";

作为调用方法,而不是使用双引号的变量.