现在可以使用新类定义匿名类,可以使用匿名类代替完整的类定义。
<?php interface Logger { public function log(string $msg); } class Application { private $logger; public function getLogger(): Logger { return $this->logger; } public function setLogger(Logger $logger) { $this->logger=$logger; } } $app=new Application; $app->setLogger(new class implements Logger { public function log(string $msg) { print($msg); } }); $app->getLogger()->log("My first Log Message"); ?>
它产生以下浏览器输出-
My first Log Message
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