PHP : Codewars 注冊練習

Question

我正在嘗試在 codewars 網站上解決這個問題：

更正此代碼，以便greet函數返回預期值。

class Person {
  public $name;
  public function __construct($name) {
    $this->name = $name;
  }
  public function greet($guest) {
    return 'Hello $guest, my name is $name';
  }
}

錯誤在哪里？

Answer 1

復雜（卷曲）語法僅適用於雙引號""

像這樣改變它：

class Person {
  public $name;
  public function __construct($name) {
    $this->name = $name;
  }
  public function greet($guest) {
    return "Hello $guest, my name is {$this->name}";
  }

}

輸出：

$x = new Person('john');
echo $x->greet('peter');

//Hello peter, my name is john