意外的T_VARIABLE错误 [英] Unexpected T_VARIABLE error

问题描述

好的，我知道这是一个很常见的问题，但到目前为止我发现的所有解决方案都涉及缺少分号或大括号，我知道这两种情况都不适合我。

Okay, I know this is a common enough question, but all the solutions I've found thus far have involved a missing semi-colon or curly brace, both of which I know is not the case for me.

我有一个使用此变量赋值的FINE类：

I have a class that works FINE with this variable assignment:

session.php：

<?php

   class session {
     ... 
     var $host = 'localhost';
     ...
   }

?>

太棒了。但是我希望将我的数据库详细信息放在另一个文件中，所以我这样做了：

Great. But I want to have my database details in another file, so I did this:

db_creds.php：

<?php

   var $db_creds = array(
      'host' => 'localhost',
      ...
   );

?>

session.php

<?php

   include('db_creds.php');

   class session {
     ... 
     var $host = $db_creds['host'];
     ...
   }

?>

然后给了我这个错误：解析错误：语法错误，意外T_VARIABLE在第74行的../session.php 中，其中第74行是我的 var $ host 赋值。

Which then gave me this error: Parse error: syntax error, unexpected T_VARIABLE in ../session.php on line 74, where line 74 is my var $host assignment.

我甚至尝试在 session.php 中这样做，只是为了确保问题不在包含中：

I even tried doing this in session.php, just to be sure the problem wasn't in the include:

session.php

<?php

   # include('db_creds.php');

   class session {
     ...
     var $db_host = 'localhost';
     var $host = $db_host;
     ...
   }

?>

...但这只会抛出与上面相同的错误。

... but that just throws the same error as above.

谁能告诉我这里发生了什么？我的智慧结束了！

Can anyone tell me what's happening here? I'm at my wits end!

推荐答案

此处不允许变量，属性必须由PHP中的常量初始化：

Variables are not allowed here, properties must be initialized by constants in PHP:

[...]此初始化必须是常量值

[…] this initialization must be a constant value

[资料来源：php.net手册]

使用构造函数正确初始化值：

Use the constructor to intialize the value properly:

class session {
    var $host;

    function __construct() {
        $this->host = $db_creds['host'];
    }
}

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