php 类型转换和数组引用

Question

我在 PHP OOPS 代码中遇到问题。

我的代码是:

class Settings
{

    private $client_addr = array(       
        'ClientID'              => array('maxlength'=>'10','IsNull'=>'n'),
        'ClientAddressType'     => array('maxlength'=>'12','IsNull'=>'y'),
        'ClientAddressLine1'    => array('maxlength'=>'30','IsNull'=>'y'),
        'ClientAddressLine2'    => array('maxlength'=>'30','IsNull'=>'y'),
        'ClientCounty'          => array('maxlength'=>'30','IsNull'=>'y'),
        'ClientCity'            => array('maxlength'=>'30','IsNull'=>'y'),
        'ClientState'           => array('maxlength'=>'2','IsNull'=>'y'),
        'ClientZip'             => array('maxlength'=>'9','IsNull'=>'y'),
    );
    private $client_general = array(
        'PayerID'                   => array('maxlength'=>'64','IsNull'=>'n'),  
        'ProviderID'                => array('maxlength'=>'50','IsNull'=>'n'),
        'ClientID'                  => array('maxlength'=>'10','IsNull'=>'n'),
        'ClientFirstName'           => array('maxlength'=>'30','IsNull'=>'n'),
        'ClientMiddleInitial'       => array('maxlength'=>'1','IsNull'=>'y'),
        'ClientLastName'            => array('maxlength'=>'30','IsNull'=>'n'),
    );

  function getSelectedArrayData($setlected_arr)
  {
      $setlected_arr = '$this->'."$setlected_arr";
      print_r($setlected_arr); //it prints a string '$this->client_general'
      print_r($this->client_general);//it prints $client_general array data
  }

}

$settings = new Settings();

$settings->getSelectedArrayData('client_general');

我的问题是:

当我打印 print_r($this->client_general); 时，它会打印 $client_general 数组，这是可以的。

Array
(
    [PayerID] => Array
        (
            [maxlength] => 64
            [IsNull] => n
        )

    [ProviderID] => Array
        (
            [maxlength] => 50
            [IsNull] => n
        )

    [ClientID] => Array
        (
            [maxlength] => 10
            [IsNull] => n
        )

    [ClientFirstName] => Array
        (
            [maxlength] => 30
            [IsNull] => n
        )

    [ClientMiddleInitial] => Array
        (
            [maxlength] => 1
            [IsNull] => y
        )

    [ClientLastName] => Array
        (
            [maxlength] => 30
            [IsNull] => n
        )

)

当我打印 print_r($setlected_arr); 时，它被打印了

$this->client_general

我想它也应该指向 $client_general 数组。

我该怎么做？

Answer 1

print_r($this->$setlected_arr);