class test1
{
  function judgeInt(int $num)
  {
    return $num;
  }
}
$cls1 = new test1();
$cls1->judgeInt("123");
$cls1->judgeInt(1.23);

//下記は上記クラスとは別テストと仮定します
$value = 1;
$value = null; // 警告なし、値は内部的に 0 として扱われる
echo "value:".(int)$value." <br>";

class test1
{
	function judgeInt(int $num)
	{
		return $num;
	}
}
$cls1 = new test1();
$cls1->judgeInt("123");
$cls1->judgeInt(1.23);

//Assume the following is a separate test from the above class.
$value = 1;
$value = null; // No warning, the value is internally treated as 0.
echo "value:".(int)$value." <br>";

class test2
{
  private function judgeInt(int $num)
  {
    echo "judgeInt関数を実行しました。<br>";
  }
  function test()
  {
    try {
        $this->judgeInt(1.23); // TypeError が発生します
    } catch (TypeError $e) {
        // ここでエラーを捕捉し、代替処理をします
        echo "Caught TypeError: " . $e->getMessage() . PHP_EOL;
        // 仕様的には良くないとしても、ここでデフォルト値を返すなどの回避策が可能です
        // 例: return round(1.23);
    } finally {
        echo "Finally block executed (always runs).\n";
    }
  }
}
$cls2 = new test2();
$cls2->test();

class test2
{
	private function judgeInt(int $num)
	{
		echo "The judgeInt function was executed. <br>";
	}
	function test()
	{
		try {
			$this->judgeInt(1.23); // A TypeError occurs.
		} catch (TypeError $e) {
			// Catch the error here and handle it accordingly.
			echo "Caught TypeError: " . $e->getMessage() . PHP_EOL;
			// Even though this is not technically correct, a workaround is possible, such as returning a default value.
			// Example: return round(1.23);
		} finally {
		echo "Finally block executed (always runs).\n";
		}
	}
}
$cls2 = new test2();
$cls2->test();

class test3
{
  private function judgeInt(int $num) 
  {
      echo "judgeInt関数を実行しました。<br>";
  }
  function test()
  {
    try {
        $this->judgeInt(null); // Fatal error: Uncaught TypeError
    } catch (TypeError $e) {
        echo "エラーを捕捉しました: " . $e->getMessage();
    }
  }
}
$cls3 = new test3();
$cls3->test();

class test3
{
	private function judgeInt(int $num)
	{
		echo "The judgeInt function was executed.<br>";
	}
	function test()
	{
		try {
			$this->judgeInt(null); // Fatal error: Uncaught TypeError
		} catch (TypeError $e) {
			echo "Error caught: " . $e->getMessage();
		}
	}
}
$cls3 = new test3();
$cls3->test();

class test4
{
  private function judgeIntNullable(?int $num):int
  {
    if ($num === null) {
        echo "値はnullです。デフォルト値の0を使用します。<br>";
        $num = 0;
    }
    return $num;
  }
  function test(?int $num)
  {
    $this->judgeIntNullable($num);
  }
  function judgeIntNull(int $num):int
  {
    if ($num === null) {
        echo "値はnullです。デフォルト値の0を使用します。<br>";
        $num = 0;
    }
    return $num;
  }
}
$cls4 = new test4();
echo $cls4->test(null);
echo $cls4->judgeIntNull(null);

class test4
{
	private function judgeIntNullable(?int $num):int
	{
		if ($num === null) {
			echo "Value is null. Using default value 0. <br>";
			$num = 0;
		}
		return $num;
		}
		function test(?int $num)
		{
			$this->judgeIntNullable($num);
		}
		function judgeIntNull(int $num):int
		{
			if ($num === null) {
				echo "Value is null. Using default value 0. <br>";
			$num = 0;
		}
		return $num;
	}
}
$cls4 = new test4();
echo $cls4->test(null);
echo $cls4->judgeIntNull(null);

class test5
{
  function test($value)
  {
      if($value === 100)
      {
        echo "data is num.<br>";
      }
      else
      {
        echo "data is string.<br>";
      }
  }
}
$cls5 = new test5();
$cls5->test("100");
$cls5->test("100"+0);

class test5
{ 
	function test($value) 
	{ 
		if($value === 100) 
		{ 
			echo "data is num.<br>"; 
		} 
		else 
		{ 
			echo "data is string.<br>"; 
		} 
	}
}
$cls5 = new test5();
$cls5->test("100");
$cls5->test("100"+0);