PHP实现猜数游戏的代码实例分享

<?php
// 标准输入流和标准输出流
$stdin = null;
$stdout = null;

/**
 * 初始化 IO 流
 */
function init() {
	global $stdin;
	global $stdout;
	
	$stdin = fopen('php://stdin', 'r');
	$stdout = fopen('php://stdout', 'w');
}

/**
 * 关闭 IO 流
 */
function destroy() {
	global $stdin;
	global $stdout;
	
	if(is_resource($stdin)) {
		fclose($stdin);
	}
	if(is_resource($stdout)) {
		fclose($stdout);
	}
}

/**
 * 从命令行读取一行数据
 */
function read() {
	global $stdin;
	
	$line = fgets($stdin);
	return trim($line, PHP_EOL); //去除换行符
}

/**
 * 向命令行输出一行数据
 */
function write($line) {
	global $stdout;
	// 转换编码
	if(stripos(PHP_OS, 'winnt') !== false) {
		$line = iconv('UTF-8', 'GBK', $line);
	}
	fwrite($stdout, $line . PHP_EOL);
}

/**
 * 第一种玩法
 * @param $count 位数
 */
function guess_the_number($count = 2) {
	// 随机生成一个 $count 位数
	$min = pow(10, $count - 1);
	$max = pow(10, $count) - 1;
	$number = rand($min, $max);
	init();
	while(1) {
		write(sprintf('Please input your number (%s-bit digit), q or quit exit: ', $count));
		$readStr = read();
		// exit program
		if($readStr == 'q' || $readStr == 'quit') {
			break;
		}
		$readInt = intval($readStr);
		if($readInt > $number) {
			write('大了');
		} else if($readInt < $number) {
			write('小了');
		} else {
			write('恭喜你，猜对了!');
			write('Input c continue to play');
			$readStr = read();
			if($readStr == 'c' || $readStr == 'continue') {
				$number = rand($min, $max);
			} else {				
				break ;
			}
		}
	}
	destroy();
}

/**
 * 得到一个没有重复数字的四位数
 */
function getRandNumber() {
	$num = rand(1, 9);
	$array = array_diff(array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9), [$num]);
	shuffle($array);
	$subarr = array_slice($array, 0, 3); //再取 3 个数字
	$str = implode('', array_merge([$num], $subarr));
	return intval($str);
}

/**
 * 第二种玩法
 */
function guess_the_number2() {
	$number = getRandNumber();
	$len = 4; //四位数
	init();
	while(1) {
		write(sprintf('Please input your number (%s-bit digit), q or quit exit: ', $len));
		$readStr = read();
		// exit program
		if($readStr == 'q' || $readStr == 'quit') {
			break;
		}
		$readInt = intval($readStr);
		if($readInt == $number) {
			write('恭喜你，猜对了!');
			write('Input c continue to play');
			$readStr = read();
			if($readStr == 'c' || $readStr == 'continue') {
				$number = getRandNumber();
			} else {				
				break ;
			}
		} else {
			// 判断 几A几B
			$readInt = str_pad($readInt, $len, '0', STR_PAD_LEFT); //不足四位的补足四位
			$number = strval($number);
			$readArr = str_split($readInt, 1); // cast to array
			$numArr = str_split($number, 1);
			$aval = 0; // 几A
			$bval = 0; // 几B
			for($i = 0; $i < $len; $i++) {
				if($readArr[$i] == $numArr[$i]) {
					$aval++;
					unset($readArr[$i], $numArr[$i]);
				}
			}
			$bval = count(array_intersect($readArr, $numArr));
			write(sprintf('%sA%sB', $aval, $bval));
		}
	}
	destroy();
}

if(PHP_SAPI == 'cli') {
	// guess_the_number(1);
	guess_the_number2();
} else {
	echo 'Please run under command line!';
	exit;
}