将全局变量的值分配给类成员

Question

Working in a CakePHP project and stucked at a place.

Config/bootstrap.php file

Configure::write('email_info', [e-mail]);

Config/email.php {My custom email class}

class EmailConfig {
public $default = array(        
    'from' => Configure::read('email_info'),
    'reply' => Configure::read('email_info')    
);}

I know I can only assigned value of any variable which is outside the class using 'global' keyword, but how do I assign config variable to the value of array member?

Answer 1

Simply initialize your property inside of the __construct method. PHP Only takes literals when initalizing properties.

class EmailConfig {
public $default = array(        
    'from' => Configure::read('email_info'),
    'reply' => Configure::read('email_info')    
);}


class EmailConfig {
  public function __construct() {   
     $this->default['from'] = Configure::read('email_info');
     $this->default['reply'] = Configure::read('email_info');
  }
}

For more info see this question: Initializing PHP class property declarations with simple expressions yields syntax error