用php写的一个猜数字的程序

写一个php的猜数字的小程序，提高自己对php的熟悉程度。

 <?php

 $count=rand(0,100);

 $number = (isset($_POST['number'])) ? $_POST['number']:$count;

 if(!isset($_POST['guess'])){

  $message =  "please enter a number";

 }

 elseif(!is_numeric($_POST['guess'])){

  $message = "please make sure you entered a number";

 }

 elseif($_POST['guess'] > $number){

  $message = "too big";

 }

 elseif($_POST['guess'] < $number){

  $message = "too small";

 }

 else if($_POST['guess'] == $number){

  header("Location:success.php");

 }

 else{

  $message = "so confused";

 }

 ?>

 <!doctype html>

 <html>

 <head>

  <title>A number guess game</title>

  <meta charset="UTF-8">

  <title>Document</title>

 </head>

 <body>

 <h1><?php echo $number?></h1>

 <h1><?php echo $message?></h1>

 <form action = "<?php echo $_SERVER['PHP_SELF']; ?>" method="post">

  <p><label for="guess">Type your answer</label> </p>

  <input type="text" id="guess" name="guess"/>

  <input type="hidden" name="number" value = "<?php echo $number?>" >

  <button type="submit" name="submit" value="submit">Submit</button>

 </form>

 </body>

 </html>

总结：

1.第2行代码：$number = (isset($_POST['number'])) ? $_POST['number']:$count; 这样写可以保证每次刷新页面时答案不会变化；

2.第18行代码：header("Location:success.php");转去success.php页面；

3.第35行代码: action = "<?php echo $_SERVER['PHP_SELF']; ?>"；传回本页面；

4.第38行代码：<input type="hidden" name="number" value = "<?php echo $number?>" > 不在页面显示而传值；

5.（不在本项目中）:<?php phpinfo(); ?>输出PHP的安装信息

巴特西

用php写的一个猜数字的程序

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