Php 对象属性未被识别为数组

我有一个名为Mail的PHP类，在另一个类中，我想执行以下操作：

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

但if条件不匹配。它从不输入foreach代码。。。 如何指示该属性实际上是一个数组？ 有什么想法吗

邮件类别：

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; 
}

您的

addToAddress（）

方法覆盖

toaddress

属性（因此使其成为字符串）。我相信您希望将以下内容添加到

toaddress

数组中：

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

此外，您可能希望向

setToAddresses（）

setter添加类型提示，以便它不接受非数组：

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

---

显示对象实例化的完整代码，请确保

$mail->getToAddresses（）

返回一个数组…只需打印即可that@SherinJose它不是在打印数组。你知道为什么吗？你在代码中的哪里使用了

settoaddress

函数。错误可能是there@SherinJose可能是正确的-如果您正在调用方法

settoaddress

，并且它正在覆盖您在

构造方法中创建的数组，那么它将返回false，除非将数组传递给
settoaddress
。