如何连接到它一直说的数据库
致命错误：未捕获的错误：在 C:\xampp\htdocs\5Dec2021\Order.php:90 中找不到类“msqli”堆栈跟踪：#0 {main} 在 C:\xampp\htdocs\5Dec2021\Order.php 中抛出第 90 行当我转到 http://localhost/5Dec2021/Menu.html 时它工作正常我可以单击按钮并在此处回答文本框但是在我提交后它变成这样
这是我的 HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
<title>Untitled 1</title>
</head>
<body>
<form method="post" action="Order.php">
<table border="1" style="width: 100%">
<tr>
<th colspan="2" style="height: 25px">Pizza Shop 2.0</th>
</tr>
<tr>
<td style="width: 310px">Name:</td>
<td>
<input name="Text1" id="Name" type="text" style="width: 299px" /></td>
</tr>
<tr>
<td style="width: 310px">Pizza Topping:</td>
<td><input name="Checkbox1[]" type="checkbox" id="supreme"value="Supreme" />Supreme<br>
<input name="Checkbox1[]" type="checkbox" id="vegetarian" value="Vegetarian" />Vegetarian<br>
<input name="Checkbox1[]" type="checkbox" id="haiwaian" value="Haiwaian" />Haiwaian
</td>
</tr>
<tr>
<td style="width: 310px">Pizza Sauce:</td>
<td><select name="Select1" id="dropdown" style="width: 296px">
<option selected="selected" value="0">-</option>
<option value="Ketchup">Ketchup</option>
<option value="Bolognese">Bolognese</option>
<option value="CheeseSpread">Cheese Spread</option>
</select></td>
</tr>
<tr>
<td style="height: 23px; width: 310px;">Optional Extra:</td>
<td style="height: 23px">
<input name="Checkbox2[]" type="checkbox" id="extra" value="Extra cheese" />Extra Cheese <br>
<input name="Checkbox2[]" type="checkbox" id="gluten" value="Gluten free base" />Gluten Free Base
</td>
</tr>
<tr>
<td style="width: 310px" colspan="2">Delivery Instruction:<br>
<textarea name="TextArea1" style="width: 608px; height: 127px"></textarea></td>
</tr>
<tr>
<td style="width: 310px" colspan="2"><input name="submit" type="submit" value="submit" /></td>
</tr>
</table>
</form>
</body>
</html>
这是我的 PHP
<?php
//variable declaration
$name=$_POST['Text1'];
$p=0;
$p2=0;
if (isset($_POST['Checkbox1']))
{
$top=$_POST['Checkbox1'];
$c=count($top);
for ($i=0; $i<$c;$i++)
{
If($top[$i]=="Supreme")
{
$p=$p+15;
}
If($top[$i]=="Vegetarian")
{
$p=$p+11;
}
If($top[$i]=="Haiwaian")
{
$p=$p+12;
}
}
}
if (isset($_POST['Select1']))
{
$sauce=$_POST['Select1'];
If($sauce=="0")
{
$p2=$p2+0;
}
If($sauce=="Ketchup")
{
$p2=$p2+4;
}
If($sauce=="Bolognese")
{
$p2=$p2+3;
}
If($sauce=="CheeseSpread")
{
$p2=$p2+5;
}
}
$p3=0;
if (isset($_POST['Checkbox2']))
{
$extra=$_POST['Checkbox2'];
$c=count($extra);
for ($i=0; $i<$c; $i++)
{
If($extra[$i]=="Extra cheese")
{
$p3=$p3+10;
}
If($extra[$i]=="Gluten free base")
{
$p3=$p3+5;
}
}
}
$delivery =$_POST['TextArea1'];
$total=0;
$total=$p+$p2+$p3;
$top=implode(" ",$_POST['Checkbox1']); // HAVE TO IMPLODE IF CAN BE MULTIPLE VALUES.
$extra=implode(" ",$_POST['Checkbox2']);
date_default_timezone_set("Asia/Kuala_Lumpur");
$date=date("d-m-Y H:i:sa");
echo "<h1>Billing statement</h1>";
echo "<br>";
echo "Hi ".$name;
echo "<br>";
echo "Total bill RM: ".$total;
//database configuration (pizzatime is the folder of the table name)
$con= new msqli("localhost","root","","pizzatime");
//is the connection working? connection error
if($con->connect_error)
{
die("Warning!Connection Failed!".$con->connect_error);
}
//if connection is ok (orderpizza is the table name, and INSERT INTO IS THE COLUMN NAMES WHILE THE VALUES ARE THE CONTAINERS OF THE BUTTONS/CHECKBOX/...
$database="INSERT INTO orderpizza(Time,Name,Top,Sauce,Extra,Delivery,Total) VALUES
('$date','$name','$top','$sauce','$extra','$delivery','$total')";
if($con->query($database)===TRUE)
{
echo "<br>";
echo "<alert>'Successfully save into the database'</alert>;";
}
else
{
echo "Error".$con->connect_error;
}
$con->close();
?>