我试图用php制作一个骰子脚本，它应该看起来像这样：http://u11626.hageveld2.nl/po/opdracht1b/index.php这是我的链接：http://u10511.hageveld2.nl/po/opdracht1b/index.php抱歉，如果答案真的很明显，但我只是无法弄清楚为什么脚本不起作用。顺便说一句："knop"的意思是"按钮"，我用作骰子的图片被称为dobbelsteen1，dobbelsteen2.....多贝尔斯汀 6
<?php
session_start();
if (!isset($_SESSION["d1"]) || !isset($_SESSION["d2"]) || !isset($_SESSION["d3"])) {
$_SESSION["d1"]=0;
$_SESSION["d2"]=0;
$_SESSION["d3"]=0;
}
elseif (isset($POST["knop1"])) {
$_SESSION["d1"]=0;
}
elseif (isset($POST["knop2"])) {
$_SESSION["d2"]=0;
}
elseif (isset($POST["knop3"])) {
$_SESSION["d3"]=0;
}
elseif (isset($POST["knop4"])) {
$_SESSION["d1"]=0;
$_SESSION["d2"]=0;
$_SESSION["d3"]=0;
}
echo "d1 =" . $_SESSION["d1"];
echo "d2 =" . $_SESSION["d2"];
echo "d3 =" . $_SESSION["d3"];
if ($_SESSION["d1"]==0) {
$f = rand(1,6);
}
if ($_SESSION["d2"]==0) {
$g=rand(1,6);
}
if ($_SESSION["d3"]==0) {
$h=rand(1,6);
}
echo $f;
for ($r=1; $r<4; $r++) {
if (!$f==0) {
$f = 0;
echo "
<div align='center'>
<img src='dobbelsteen" . $f . ".gif'>
<form method='post'>
<input type='submit' name='knop1' value='Dobbelsteen gooien'>
</form>
";
}
elseif (!$g==0) {
$g = 0;
echo "
<div align='center'>
<img src='dobbelsteen" . $g . ".gif'>
<form method='post'>
<input type='submit' name='knop2' value='Dobbelsteen gooien'>
</form>
";
}
elseif (!$h==0) {
$h = 0;
echo "
<div align='center'>
<img src='dobbelsteen" . $h . ".gif'>
<form method='post'>
<input type='submit' name='knop3' value='Dobbelsteen gooien'>
</form>
";
}
}
？>
我已经写了我认为最适合您正在做的掷骰子练习的脚本。我在这里给你所有的答案，但希望你能研究我的方法并从中学习。
<?php
//Start the php session
session_start();
//Initialise local dice array
//Check the session variable for already set values, if not set a random value
//Use TERNARY OPERATORS here to avoid multipl if else
$dice = array(
0 => (!empty($_SESSION['dice'][0])) ? $_SESSION['dice'][0] : rand(1, 6),
1 => (!empty($_SESSION['dice'][1])) ? $_SESSION['dice'][1] : rand(1, 6),
2 => (!empty($_SESSION['dice'][2])) ? $_SESSION['dice'][2] : rand(1, 6)
);
//If form has been submitted, and our expected post var is present, check the dice we want to role exists, then role it
//$_POST['roll_dice'] holds the index of the local dice value array element we need to update
if(!empty($_POST['roll_dice']) && !empty($dice[intval($_POST['roll_dice'])])){
$dice[intval($_POST['roll_dice'])] = rand(1, 6);
}
//Save the updated values to the session
$_SESSION['dice'] = $dice;
//Loop over the dice and output them
foreach($dice as $dice_index => $dice_val){
echo "<div class='dice' style='height:100px;width:100px;background-color:red;text-align:center;margin-bottom:50px;padding-top:10px;'>";
echo "<p style='style='margin-bottom:20px;'>".$dice_val."</p>";
echo "<form method='post'>";
echo "<input type='hidden' name='roll_dice' value='".$dice_index."' />";
echo "<input type='submit' value='Roll Dice' />";
echo "</form>";
echo "</div>";
}
?>
要添加新的骰子，只需增加$dice数组的大小。例如，下一个将是：
3 => (!empty($_SESSION['dice'][3])) ? $_SESSION['dice'][3] : rand(1, 6)
然后是 4，依此类推。
我希望这有所帮助。
您的脚本存在一些问题，正如 B 所说@Marc"您永远不会将随机数保存回会话"，您正在使用$POST访问帖子数据，因为它应该是 $_POST，希望这可以帮助您修复脚本。