Exception: Serialization of 'Closure' is not allowed

closures, exception, php, serialization

Solution

Apparently anonymous functions cannot be serialized.

Example

$function = function () {
    return "ABC";
};
serialize($function); // would throw error

From your code you are using Closure:

$callback = function () // <---------------------- Issue
{
    return 'ZendMail_' . microtime(true) . '.tmp';
};

Solution 1 : Replace with a normal function

Example

function emailCallback() {
    return 'ZendMail_' . microtime(true) . '.tmp';
}
$callback = "emailCallback" ;

Solution 2 : Indirect method call by array variable

If you look at http://docs.mnkras.com/libraries_23rdparty_2_zend_2_mail_2_transport_2file_8php_source.html

   public function __construct($options = null)
   63     {
   64         if ($options instanceof Zend_Config) {
   65             $options = $options->toArray();
   66         } elseif (!is_array($options)) {
   67             $options = array();
   68         }
   69 
   70         // Making sure we have some defaults to work with
   71         if (!isset($options['path'])) {
   72             $options['path'] = sys_get_temp_dir();
   73         }
   74         if (!isset($options['callback'])) {
   75             $options['callback'] = array($this, 'defaultCallback'); <- here
   76         }
   77 
   78         $this->setOptions($options);
   79     }

You can use the same approach to send the callback

$callback = array($this,"aMethodInYourClass");

Problem

So I am not sure exactly what I would have to show you guys, how ever if you need more code please do not hesitate to ask: So this method will set up the initMailer for Zend with in our application: ``` protected function _initMailer() { if ('testing' !== APPLICATION_ENV) { $this->bootstrap('Config'); $options = $this->getOptions(); $mail = new Zend_Application_Resource_Mail($options['mail']); }elseif ('testing' === APPLICATION_ENV) { //change the mail transport only if dev or test if (APPLICATION_ENV <> 'production') { $callback = function() { return 'ZendMail_' . microtime(true) .'.tmp'; }; $mail = new Zend_Mail_Transport_File( array('path' => '/tmp/mail/', 'callback'=>$callback ) ); Zend_Mail::setDefaultTransport($mail); } } return $mail; } ``` You can see the closure that lies with in. When I run any tests that use this code I get: ``` Exception: Serialization of 'Closure' is not allowed ``` and thus all the tests in relation to this "closure" fails. So I am here asking you guys what I should do. For clarification on the above, all were doing is saying that any email we send out we want to store information about that email in a folder in the /tmp/mail/ directory in a file.

Original source