php PHP函数每次将变量增加1
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PHP function to increment variable by 1 each time
提问by Harry12345
I have started writing a PHP script for a game about creatures, there are 4 yes/no questions and what I am trying to do is write a function that will display 2 buttons that say yes and no and give then different names each time I run the function, for example yes1 and no1, then the next time the function is run the names of the buttons will be yes2 and no2.
我已经开始为一个关于生物的游戏编写 PHP 脚本，有 4 个是/否问题，我想要做的是编写一个函数，该函数将显示 2 个按钮，分别表示是和否，并在每次运行时给出不同的名称函数，例如 yes1 和 no1，那么下次运行该函数时，按钮的名称将是 yes2 和 no2。
I have attempted to do this already but it is not working correctly, below is the code I have done so far, any help would be much appreciated.
我已经尝试过这样做，但它无法正常工作，以下是我到目前为止所做的代码，任何帮助将不胜感激。
<?php
session_set_cookie_params(2592000);
session_start();
?>
<html>
<head>
<title>Creature Guessing Game</title>
</head>
<body>
<h1>Creature Guessing Game</h1>
<p> Welcome to the creature guessing game! </p>
<p>Click the button below to start or restart the game </p>
<form method="post" action="Creatures.php">
<input type="submit" name="start" value="Start Game" />
</form>
<?php
$questions = array('Does the creature live on land?', 'Does it have wings?', 'Does it live near water?', 'Can it fly?');
function repeat()
{
$number = 0;
$number++;
echo "<form method ='post' action='Creatures.php'>
<input type='submit' name='yes'.$number value='Yes' />
<input type='submit' name='no'.$number value='No' />
</form>";
}
//If form not submitted, display form.
if (!isset($_POST['start'])){
?>
<?php
} //If form is submitted, process input
else{
switch($_POST)
{
case yes1:
echo $questions[0];
repeat();
break;
case no1:
echo $questions[1];
repeat();
break;
case yes2:
echo $questions[2];
repeat();
break;
case no2:
$questions[3];
repeat();
}
}
?>
</body>
</html>
回答by ShaaD
To do this you need to maintain state between requests.
为此，您需要在请求之间维护状态。
function repeat() {
$number = $_SESSION['number'];
$number++;
echo "<form method ='post' action='Creatures.php'>
<input type='submit' name='answer' value='Yes' />
<input type='submit' name='answer' value='No' />
</form>";
$_SESSION['number'] = $number;
}
switch
转变
if($_POST['answer']=='Yes') {
switch($_SESSION['number']) {
case 1:
break;
case 2:
break;
}
} else {
switch($_SESSION['number']) {
case 1:
break;
case 2:
break;
}
}
回答by Anthony Ogundipe
I am not in agreement with the accepted answer: Here is an easier way to go about it without session:
我不同意接受的答案：这是一种更简单的方法，无需会话：
function repeat() {
static $number = 0;
$number++;
echo "<form method ='post' action='Creatures.php'>
<input type='submit' name='answer' value='Yes' />
<input type='submit' name='answer' value='No' />
</form>";
}
回答by Ruben Nagoga
You have to store 'number' in session because it will loose his value every time page submitted.
您必须在会话中存储“数字”，因为每次提交页面时它都会丢失他的值。
