在 __construct() 中回显

发布于 2024-12-02 12:55:25 字数 346 浏览 2 评论 0原文

如何读取 __construct() 中的变量？

这是示例代码：

class Sample {
   private $test;

   public function __construct(){
      $this->test = "Some text here.";
   }
}

$sample = new Sample();
echo $sample->test;

这段代码有什么问题？因为 __construct 是自动的，所以我只是认为它将在类示例上运行并自动读取它。

是否可以在不接触 __construct() 的情况下回显这一点？谢谢。

原文

How to read variable inside __construct()?

Here's the sample code:

class Sample {
   private $test;

   public function __construct(){
      $this->test = "Some text here.";
   }
}

$sample = new Sample();
echo $sample->test;

What is wrong with this code? Because __construct is automatic, I just thought that it will run on class sample and read it automatically.

Is it possible to echo this out without touching __construct()?
Thank you.

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甩你一脸翔 2024-12-09 12:55:25

您需要将$test设为公开。当它是私有的时，它只能从类内部读取。

class Sample {
   public $test;

   public function __construct(){
      $this->test = "Some text here.";
   }
}

$sample = new Sample();
echo $sample->test;

You need to make $test public. When it's private, it is only readable from within the class.

class Sample {
   public $test;

   public function __construct(){
      $this->test = "Some text here.";
   }
}

$sample = new Sample();
echo $sample->test;

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