Add PHP function in CakePHP model array - php

Question

I have an array of behaviour $actas.Problem is when I adding date() function on the array string,it's return an error:
Example:
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' => ''
)
)
);
however it's not working. I also do like this:
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' => ''
)
)
);
also not worked.
So my question is how to do that? If I have a lot of mistaken,please tell me so I can learn more about the matter.
Thanks in advance.
This is the full source code of Post.php model
<?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()
)
)
);
}

Answer 1

ahh ok I was not looking at it with my OO hat on. you can't do this because:
Properties
Class member variables are called "properties". You may also see them
referred to using other terms such as "attributes" or "fields", but
for the purposes of this reference we will use "properties". They are
defined by using one of the keywords public, protected, or private,
followed by a normal variable declaration. This declaration may
include an initialization, but this initialization must be a
constant value--that is, it must be able to be evaluated at compile
time and must not depend on run-time information in order to be
evaluated.
you need to use the __construct() method