Debugging closures

Opis Closure is debugging friendly and can be used in conjunction with error handlers like whoops without any special or supplemental configurations.

use function Opis\Closure\{serialize, unserialize};

// register whoops
$whoops = new \Whoops\Run();
$whoops->pushHandler(new \Whoops\Handler\PrettyPageHandler());
$whoops->register();

$closure = function() {
    throw new \Exception("You should catch me");
};

// Unserialize a serialized closure
$closure = unserialize(serialize($closure));

// Call the closure to throw the exception
$closure();

Opis Closure allows you to track the residing source of a serialized closure by using the #trackme directive inside the closure. The #trackme directive provides the following information:

• Date - the datetime when the closure was serialized, represented in the W3C format
• File - the file where the serialized closure resides
• Line - the line where the closure can be located inside the File

use function Opis\Closure\{serialize, unserialize};

$whoops = new \Whoops\Run();
$whoops->pushHandler(new \Whoops\Handler\PrettyPageHandler());
$whoops->register();

$closure = function() {
    #trackme
    throw new \Exception("You should catch me");
};


$closure = unserialize(serialize($closure));

$closure();