use Random\Randomizer;
use Random\Engine\Secure;//セキュリティを重視する場合

class test1
{
	function test1()
	{
		$num = random_int(0, 9);
		echo $num.PHP_EOL;//ex.)9
	}

	function test2()
	{
		echo mt_rand(0, 9);//ex.)8
	}
	function test3()
	{
		// random_int() と同等の安全性を持つインスタンス
		$randomizer = new Randomizer(new Secure());
		echo $randomizer->getInt(0, 9);//ex.)6
	}
	function test4()
	{
		// 1. 0から9までの配列を作成
		$numbers = range(0, 9);
		
		// 2. Randomizerを使用してシャッフル（内部で安全なフィッシャー・イェーツを実行）
		$randomizer = new Randomizer();
		$shuffledNumbers = $randomizer->shuffleArray($numbers);
		
		print_r($shuffledNumbers);
		/*
		Array
		(
			[0] => 9
			[1] => 7
			[2] => 3
			[3] => 1
			[4] => 6
			[5] => 8
			[6] => 5
			[7] => 0
			[8] => 4
			[9] => 2
		)
		*/
	}
	function test5()
	{
		
		// 0から9までの配列で実行
		$numbers = range(0, 9);
		$shuffled = $this->fisherYatesShuffle($numbers);
		
		print_r($shuffled);
		/*
		Array
		(
			[0] => 8
			[1] => 5
			[2] => 2
			[3] => 1
			[4] => 7
			[5] => 3
			[6] => 6
			[7] => 0
			[8] => 4
			[9] => 9
		)
		*/
	}
	private function fisherYatesShuffle(array $items): array 
	{
		$count = count($items);
		
		// 配列の最後尾から手前に向かって処理
		for ($i = $count - 1; $i > 0; $i--) 
		{
			// 0から$iの間でランダムなインデックスを選択
			$j = random_int(0, $i);
			
			// 要素の入れ替え
			$temp = $items[$i];
			$items[$i] = $items[$j];
			$items[$j] = $temp;
		}
		
		return $items;
	}

}
echo "<pre>";
$cls1= new test1();
echo "[test1]".PHP_EOL;
$cls1->test1();
echo "[test2]".PHP_EOL;
$cls1->test2();
echo "[test3]".PHP_EOL;
$cls1->test3();
echo "[test4]".PHP_EOL;
$cls1->test4();
echo "[test5]".PHP_EOL;
$cls1->test5();

echo "</pre>";

use Random\Randomizer;
use Random\Engine\Secure; // For security-conscious users

class test1
{
	function test1()
	{
		$num = random_int(0, 9);
		echo $num.PHP_EOL; // ex.)9
	}
	
	function test2()
	{
		echo mt_rand(0, 9); // ex.)8
	}
	function test3()
	{
		// Instance with the same security as random_int()
		$randomizer = new Randomizer(new Secure());
		echo $randomizer->getInt(0, 9); // ex.)6
	}
	function test4()
	{
		// 1. Create an array of numbers from 0 to 9
		$numbers = range(0, 9);
		
		// 2. Shuffle using Randomizer (performs secure Fisher-Yates internally)
		$randomizer = new Randomizer();
		$shuffledNumbers = $randomizer->shuffleArray($numbers);
		
		print_r($shuffledNumbers);
		/*
		Array
		(
		[0] => 9
		[1] => 7
		[2] => 3
		[3] => 1
		[4] => 6
		[5] => 8
		[6] => 5
		[7] => 0
		[8] => 4
		[9] => 2
		)
		*/
	}
	function test5()
	{
		
		// Run on an array from 0 to 9
		$numbers = range(0, 9);
		$shuffled = $this->fisherYatesShuffle($numbers);
		
		print_r($shuffled);
		/*
		Array
		(
		[0] => 8
		[1] => 5
		[2] => 2
		[3] => 1
		[4] => 7
		[5] => 3
		[6] => 6
		[7] => 0
		[8] => 4
		[9] => 9
		)
		*/
	}
	private function fisherYatesShuffle(array $items): array
	{
		$count = count($items);
		
		// Process from the end of the array to the front
		for ($i = $count - 1; $i > 0; $i--) 
		{
			// Select a random index between 0 and $i
			$j = random_int(0, $i);
			
			// Swap elements
			$temp = $items[$i];
			$items[$i] = $items[$j];
			$items[$j] ​​= $temp;
		}
	
		return $items;
	}

}
echo "<pre>";
$cls1 = new test1();
echo "[test1]".PHP_EOL;
$cls1->test1();
echo "[test2]".PHP_EOL;
$cls1->test2();
echo "[test3]".PHP_EOL;
$cls1->test3();
echo "[test4]".PHP_EOL;
$cls1->test4();
echo "[test5]".PHP_EOL;
$cls1->test5();

echo "</pre>";