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Anonymous classes in PHP 7?
Anonymous classes in PHP 7 can be defined using the new class. It can be used instead of full class definition as well. Why use anonymous classes?
- Mocking tests is easy.
- Dynamic implementations for interfaces can be created easily, thereby avoiding the usage of complex mocking APIs.
They can be placed in the scope where they had been defined.
The usage of autoloader for simple implementations can be avoided.
Example
Below is a code sample −
<?php
interface a_logger {
public function log(string $msg);
}
class App {
private $logger;
public function getLogger(): a_logger {
return $this->logger;
}
public function setLogger(a_logger $logger) {
$this->logger = $logger;
}
}
$app = new App;
$app->setLogger(new class implements a_logger {
public function log(string $msg) {
print($msg);
}
});
$app->getLogger()->log("This has created an anonymous class");
?>Output
This will produce the following output −
This has created an anonymous class
Updated on: 06-Apr-2020
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