PHP 无法访问受保护的属性错误
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PHP cannot access protected property error
提问by Ram
PHP Fatal error: Cannot access protected property Exception::$message in /web/index.php on line 23
PHP 致命错误：无法访问第 23 行 /web/index.php 中的受保护属性 Exception::$message
On line 23 I have,
在第 23 行，我有，
echo '<?xml version=\'1.0\'?><error-response status="error">
<message><![CDATA['.$e->message.']]></message>
</error-response>';
I can't see anything wrong with this, but I see the above exception occasionally in the logs. What's wrong?
我看不出这有什么问题，但我偶尔会在日志中看到上述异常。怎么了？
回答by Karl-Bj?rnar ?ie
Use $e->getMessage()instead of $e->messagebecause message is a protected property :)
使用$e->getMessage()而不是$e->message因为消息是受保护的属性:)
回答by meagar
$messageis a protectedmember of class Exception, as the error message states. You want the public accessor getMessage:
$message是异常类的受保护成员，如错误消息所述。您需要公共访问器getMessage：
$e->getMessage()
回答by RaviRokkam
Members declared protected can be accessed only within the class itself and by inherited and parent classes.
声明为 protected 的成员只能在类本身内以及被继承类和父类访问。
class MyClass {
public $public = 'Public';
protected $protected = 'Protected';
private $private = 'Private';
function printHello()
{
echo $this->public;
echo $this->protected;
echo $this->private;
}
}
$obj = new MyClass();
echo $obj->public; // Works
echo $obj->protected; // Fatal Error
echo $obj->private; // Fatal Error
$obj->printHello(); // Shows Public, Protected and Private
You can dig more into Property Visibilityhere
您可以在此处深入了解属性可见性
