Question

addRecipients使用push_array但它不起作用。我在这做错了什么？

在class.emailer.php

中

class Emailer
{
public $sender;
public $recipients;
public $subject;
public $body;

function __construct($sender)
{
    $this->sender = $sender;
    $this->recipients = array();
}

public function addRecipients($recipient)
{
    array_push($this->recipients, $recipient);
}

public function setSubject($subject)
{
    $this->subject = $subject;
}

public function setBody($body)
{
    $this->body = $body;
}

public function sendEmail()
{
    echo "From sendEmail, send email initiated<br />";
    echo "Body: ".$this->body."<br />";
    echo "Subject: ".$this->subject."<br />";
    print_r ($this->sender);
    print_r ($this->recipients);
    echo "<br />";
    foreach ($this->recipients as $recipient)
    {
        echo "6<br />";
        //$result = mail($recipient, $this->subject, $this->body,"From: {$this->sender}\r\n");
        echo "7<br />";
        if ($result) echo "Mail successfully sent to {$recipient}<br/>";
    }
}

}

在class.extendedemailer.php

中

include_once("class.emailer.php"); 

class ExtendedEmailer extends emailer
{
function  __construct(){
    //overwriting __contruct here   
}

public function setSender($sender)
{
    $this->sender = $sender;
}
}

并在sendemail.php

    include_once("class.extendedemailer.php"); 
echo "start 1<br />";
$xemailer = new ExtendedEmailer(); 

echo "1. adding sender: <br />";
$xemailer->setSender("sender@mywebsite.com"); 
print_r ($xemailer->sender);
echo "<br />2. adding recipients: <br />";
$xemailer->addRecipients("recipientemail@gmail.com"); 
var_dump ($xemailer->recipients);
echo "<br />3. adding subject: <br />";
$xemailer->setSubject("Just a Test<br />"); 
print_r ($xemailer->subject);
echo "4. adding body<br />";
$xemailer->setBody("Hi, How are you?<br />"); 
print_r ($xemailer->body);
echo "5. sending email<br />";
$xemailer->sendEmail();

收件人的输出为NULL。

start 1
1. adding sender: 
sender@mywebsite.com
2. adding recipients: 
NULL 
3. adding subject: 
Just a Test
4. adding body
Hi, How are you?
5. sending email
From sendEmail, send email initiated
Body: Hi, How are you?

Subject: Just a Test

Answer 1

当你重写构造函数时，你可能不会发起$recipients。

class Emailer {
    public $recipients = array();

    function __construct($sender)
    {
        $this->sender = $sender;
    }

应该这样做。检查您的警告

警告：array_push（）期望参数1为数组，在......
中给出null

Answer 2

您需要从ExtendedEmailer的构造函数中调用父的构造函数。

class ExtendedEmailer extends emailer
{
  function  __construct(){
    parent::__construct(null); 
  }

  // ...
}

否则$recipients永远不会被初始化为数组。

Answer 3

问题是你覆盖了Email类的构造函数而从不调用它（parent::__construct()）。在ExtendedEmailer类构造函数中调用父构造函数，或者如果您实际上没有使用它，则从ExtendedEmailer中完全删除构造函数（在示例代码中，您不是）。

Answer 4

您错过了调用子构造函数中的父构造函数

class ExtendedEmailer extends emailer
{
    function  __construct(){
        //overwriting __contruct here
        parent::__construct('dummy_sender@sender.com');
    }
}

应解决此问题。

Answer 5

文件“class.emailer.php”中的

只做

public $recipients = array();

而不仅仅是那种裸体

public $recipients;

这就是全部，而且作为一个额外的，你可以随心所欲地填补你的建造者。 - 您怎么看？

问候，M。

在php中的方法中使用array_push

5 个答案: