對象屬性不被識別爲一個數組

Question

我有一個名爲Mail中的PHP類和其他類我要做到以下幾點：

if (is_array ($mail->getToAddresses())) { 
     foreach ($mail->getToAddresses() as $address) { 
      $mailer->addAddress ($address); 
     } 
} 

但如果條件不匹配。它從來沒有進入foreach代碼... 我如何表明該屬性是一個真正的數組？ 任何想法？

郵件類：

class Mail { 

private $from; 
private $fromName; 
private $subject; 
private $toAddresses; 
private $ccAddresses; 
private $bccAddresses; 
private $message; 

public function __construct() { 
    $this->toAddresses = array(); 
    $this->ccAddresses = array(); 
    $this->bccAddresses = array(); 
} 

public function addToAddress($toAddress) { 
    $this->toAddresses = $toAddress; 
} 

public function addCcAddress($ccAddress) { 
    $this->ccAddresses = $ccAddress; 
} 

public function addBccAddress($bccAddress) { 
    $this->bccAddresses = $bccAddress; 
} 

public function getFrom() { 
    return $this->from; 
} 

public function setFrom($from) { 
    $this->from = $from; 
} 

public function getFromName() { 
    return $this->fromName; 
} 

public function setFromName($fromName) { 
    $this->fromName = $fromName; 
} 

public function getSubject() { 
    return $this->subject; 
} 

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

public function getToAddresses() { 
    return $this->toAddresses; 
} 

public function setToAddresses($toAddresses) { 
    $this->toAddresses = $toAddresses; 
} 

public function getCcAddresses() { 
    return $this->ccAddresses; 
} 

public function setCcAddresses($ccAddresses) { 
    $this->ccAddresses = $ccAddresses; 
} 

public function getBccAddresses() { 
    return $this->bccAddresses; 
} 

public function setBccAddresses($bccAddresses) { 
    $this->bccAddresses = $bccAddresses; 
} 

public function getMessage() { 
    return $this->message; 
} 

public function setMessage($message) { 
    $this->message = $message; 
} 

public function __toString() { 
    return "from=" . $this->from . ", fromName=" . $this->fromName . ", subject=" . $this->subject . ", message=" . $this->message; 
} 

Answer 1

你addToAddress()方法覆蓋toAddresses屬性（因此使其成爲一個字符串）。我相信你想添加到toAddresses陣中還有代替：

public function addToAddress($toAddress) { 
    $this->toAddresses[] = $toAddress; 
} 

而且，你可能要一個類型提示添加到setToAddresses()二傳手，所以它不接受非陣列：

public function setToAddresses(array $toAddresses) { 
    $this->toAddresses = $toAddresses; 
}