在CakePHP模型数组中添加PHP函数

我有一个行为数组$actas。问题是当我在数组字符串上添加date（）函数时，它返回一个错误：

例如：

public $actas = array(
'Uploader.Attachment'=>array( 
      'books' => array(
            'maxWidth' => 1200,
            'maxHeight' => 1200,
            'extension' => array('pdf'),
            'nameCallback' => '',
            'append' => '',
            'prepend' => '',
            'tempDir' => TMP,
            'uploadDir' => '/var/www/html/apps/webroot/files/uploads/books' . date('d-m-Y'),//this  is where I want to add the function.
            'transportDir' => ''
            )
       )
   );

但是它不起作用。我也喜欢这样：

 public $actas = array(
    'Uploader.Attachment'=>array( 
          'books' => array(
                'maxWidth' => 1200,
                'maxHeight' => 1200,
                'extension' => array('pdf'),
                'nameCallback' => '',
                'append' => '',
                'prepend' => '',
                'tempDir' => TMP,
                'uploadDir' => "/var/www/html/apps/webroot/files/uploads/books'".date('d-m-Y')."'",//this  is where I want to add the function.
                'transportDir' => ''
                )
           )
       );

也不管用

所以我的问题是如何做到这一点？如果我有很多错误，请告诉我，这样我可以了解更多关于这件事

提前谢谢

这是Post.php模型的完整源代码

<?php
App::uses('AppModel', 'Model');
/**
 * Post Model
 *
 * @property Tier $Tier
 * @property Category $Category
 * @property Comment $Comment
 */
class Post extends AppModel {
      //var $now = 'CURDATE()';
/**
 * Validation rules
 *
 * @var array
 */
    public $validate = array(
        'title' => array(
            'notEmpty' => array(
                'rule' => array('notEmpty'),
                //'message' => 'Your custom message here',
                //'allowEmpty' => false,
                //'required' => false,
                //'last' => false, // Stop validation after this rule
                //'on' => 'create', // Limit validation to 'create' or 'update' operations
            ),
        ),
        'content' => array(
            'notEmpty' => array(
                'rule' => array('notEmpty'),
                //'message' => 'Your custom message here',
                //'allowEmpty' => false,
                //'required' => false,
                //'last' => false, // Stop validation after this rule
                //'on' => 'create', // Limit validation to 'create' or 'update' operations
            ),
        ),

    );

    //The Associations below have been created with all possible keys, those that are not needed can be removed

/**
 * belongsTo associations
 *
 * @var array
 */
    public $belongsTo = array(
        'Tier' => array(
            'className' => 'Tier',
            'foreignKey' => 'tier_id',
            'conditions' => '',
            'fields' => '',
            'order' => ''
        ),
        'Category' => array(
            'className' => 'Category',
            'foreignKey' => 'category_id',
            'conditions' => '',
            'fields' => '',
            'order' => ''
        )
    );

/**
 * hasMany associations
 *
 * @var array
 */
    public $hasMany = array(
        'Comment' => array(
            'className' => 'Comment',
            'foreignKey' => 'post_id',
            'dependent' => false,
            'conditions' => '',
            'fields' => '',
            'order' => '',
            'limit' => '',
            'offset' => '',
            'exclusive' => '',
            'finderQuery' => '',
            'counterQuery' => ''
        )
    );

    public $actsAs = array(
    //'Containable',
    'Uploader.Attachment' => array(
        // Do not copy all these settings, it's merely an example
        'banner' => array(
            'maxWidth' => 1200,
            'maxHeight' => 1200,
            'extension' => array('gif', 'jpg', 'png', 'jpeg'),
            'nameCallback' => '',
            'append' => '',
            'prepend' => '',
            'tempDir' => TMP,
            'uploadDir' => "/var/www/html/apps/webroot/img/banners/",
            'transportDir' => '',
            'finalPath' => '/img/banners/',
            'dbColumn' => '',
            'metaColumns' => array(),
            'defaultPath' => '',
            'overwrite' => true,
            'transforms' => array(),
            'stopSave' => true,
            'allowEmpty' => true,
            'transformers' => array(),
            'transport' => array(),
            'transporters' => array(),
            'curl' => array()
            ),
        'feature' => array(
            'maxWidth' => 1200,
            'maxHeight' => 1200,
            'extension' => array('gif', 'jpg', 'png', 'jpeg'),
            'nameCallback' => '',
            'append' => '',
            'prepend' => '',
            'tempDir' => TMP,
            'uploadDir' => '/var/www/html/apps/webroot/img/features/',
            'transportDir' => '',
            'finalPath' => '/img/features/',
            'dbColumn' => '',
            'metaColumns' => array(),
            'defaultPath' => '',
            'overwrite' => true,
            'transforms' => array(),
            'stopSave' => true,
            'allowEmpty' => true,
            'transformers' => array(),
            'transport' => array(),
            'transporters' => array(),
            'curl' => array()
            ),
    'books' => array(
            'maxWidth' => 1200,
            'maxHeight' => 1200,
            'extension' => array('pdf'),
            'nameCallback' => '',
            'append' => '',
            'prepend' => '',
            'tempDir' => TMP,
            'uploadDir' => '/var/www/html/apps/webroot/files/uploads/books' . date('d-m-Y'),
            'transportDir' => '',
            'finalPath' => '/files/uploads/books/',
            'dbColumn' => '',
            'metaColumns' => array(),
            'defaultPath' => '',
            'overwrite' => true,
            'transforms' => array(),
            'stopSave' => true,
            'allowEmpty' => true,
            'transformers' => array(),
            'transport' => array(),
            'transporters' => array(),
            'curl' => array()
            )
        )

    );
}

---

啊，好吧，我不是戴着OO帽子看的。您不能这样做，因为：

类成员变量称为“属性”。你也可以看到它们
指使用其他术语，如“属性”或“字段”，但
在本参考中，我们将使用“属性”。他们是
通过使用关键字public、protected或private之一定义，
后跟一个普通变量声明。本声明可以
包括初始化，但此初始化必须是
常量值——也就是说，它必须能够在编译时进行计算
时间，并且必须不依赖于运行时信息才能
已评估。

您需要使用
\u construct（）
方法对我有效：（忽略通知）您确定要向我们显示生成错误的代码吗？它仍然不起作用。请继续打印致命错误错误：语法错误，意外“.”，期望“）”发布完整代码，您发布的代码不是错误的原因谢谢您，先生。但我不知道如何实现。如果您不介意，您可以分享一些参考资料如何做到这一点，以便我可以阅读和进行研发。再次感谢。
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