// PHP 代码
interface process {
public function process() {
echo 'aaaaa';
}
}
class event {
private $m;
public function __construct($me) {
$this->m = $me;
}
public function click () {
echo 'ffff';
}
}
class playProcess {
private $msg = null;
public function __construct() {
}
public function callback (event $event) {
$this->msg = $event->click();
if ($this->msg instanceof process) {
$this->msg->process();
}
}
}
代码如上,请问上述回调方法中$event参数之前的 event 是什么意思? 有什么作用?
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