wamp - PHP表单不同平台遇到的问题-PHP中文网问答

写了一个关于猜数字的PHP程序，在mac上用mamp运行，接收不了表单$_post数据
但在windows上用camp运行就没问题，求教这是怎么回事？
这是代码：

<?php
$message = "Welcome to the guessing matchine!";
if($_SERVER['REQUEST_METHOD'] == 'POST' ){
    $num_to_guess = 42;
    if (!is_numeric($_POST['guess'])) {
        $message = "I don't understand that response.";
    } elseif ($_POST['guess'] == $num_to_guess) {
        $message = "Well done!";
    } elseif ($_POST['guess'] > $num_to_guess) {
        $message = $_POST['guess']." is too big!";
    } elseif ($_POST['guess']>$num_to_guess) {
        $message = $_POST['guess']." is too small!";
    } else {
        $message = "I am terribly confused.";
    }
}
file_put_contents("php://input");
?>

<!DOCTYPE HTML>
<html>
<head>
    <title>A PHP number guessing script</title>
</head>
<body>
<h1><?php echo $message;?></h1>
<form method="post">
    <p><label for="guess">Type your guess here:</label><br/>
        <input type="text" id="guess" name="guess"/></p>
    <button type="submit" name="submit" value="submit">Submit</button>
</form>
</body>
</html>