php - 是否可以在 PHP 中重载构造函数

Question

例如，在 C# 中，您可以使用相同的方法名称重载方法，但 PHP 呢？

 class Database {
    private $dsn;
    private $host;
    private $user;
    private $password;
    private $enckey;

    function __construct($dbname, $host, $user, $password) {
        $this->dsn = "mysql:dbname=" . $dbname . ';host=' . $host;
        $this->user = $user;
        $this->password = $password;
}
    function __construct($dbname, $host, $user, $password, $enckey) {
        $this->dsn = "mysql:dbname=" . $dbname . ';host=' . $host;
        $this->user = $user;
        $this->password = $password;
        $this->enckey = $enckey;
    }
}

Answer 1

有什么意义？

class Database {
    private $dsn;
    private $host;
    private $user;
    private $password;
    private $enckey;

    function __construct($dbname, $host, $user, $password, $enckey = null) {
        $this->dsn = "mysql:dbname=" . $dbname . ';host=' . $host;
        $this->user = $user;
        $this->password = $password;
        $this->enckey = $enckey;
    }
}