将 PHP 中的多个会话变量插入到 mySQL 数据库中，为什么它不起作用

Question

您好，为了将会话数据插入数据库，我无法使下面的查询正常工作，谁能告诉我它有什么问题或者我可以做些什么来修复它？提前致谢。

<?php
session_start();
 if (isset($_POST['sub'])) {
$host='localhost';
$user='root';
$pass='';
$db='theatre_booking';

$con=mysqli_connect($host,$user,$pass,$db);

$row = $_POST['row'];
$_SESSION["row"]=$row;  

$zone = $_POST['zone'];
$_SESSION["zone"]=$zone;

$quantity = $_POST['numberOfTickets'];
$_SESSION["numberOfTickets"]=$quantity;



$sql="INSERT INTO booking(PerfDate, PerfTime, Name, Email, RowNumber) 
VALUES 
    '{$_SESSION['date']}',
    '{$_SESSION['time']}',
    '{$_SESSION['name']}',
    '{$_SESSION['email']}',
    '{$_SESSION['row']}')";

    if ($con->query($sql) === TRUE) {
    echo "Booking successful";
} else {
    echo "Error: " . $sql . "<br>" . $con->error;
}
 }





?>

Answer 1

插入语句中的值后缺少左括号“(”。

$sql="INSERT INTO booking(PerfDate, PerfTime, Name, Email, RowNumber) 
VALUES (
    '{$_SESSION['date']}',
    '{$_SESSION['time']}',
    '{$_SESSION['name']}',
    '{$_SESSION['email']}',
    '{$_SESSION['row']}')";

    if ($con->query($sql) === TRUE) {
    echo "Booking successful";
} else {
    echo "Error: " . $sql . "<br>" . $con->error;
}

Answer 2

VALUES 后缺少左括号，我建议您在字符串中明确写入变量。不要依赖 php 变量扩展，它也更容易阅读。

$sql='INSERT INTO booking(PerfDate, PerfTime, Name, Email, RowNumber)
 VALUES
 ("' . $_SESSION["date"] . '", 
  "' . $_SESSION['time'] . '",
  "' . $_SESSION['name'] . '",
  "' . $_SESSION['email'] . '",
  "' . $_SESSION['row']  . '"
  )';

将 PHP 中的多个会话变量插入到 mySQL 数据库中，为什么它不起作用

Inserting multiple session variables from PHP into mySQL database, why isn't it working

php

mysql

mysqli

sql-insert