Question

我正在尝试创建一个PHP脚本来执行以下操作：

存储用户输入数据
从数据库中提取最后输入的ID（自动递增）和电子邮件地址（用户输入）
使用数据库中的电子邮件地址

我有以下代码：

<?php

/* Attempt MySQL server connection. Assuming you are running MySQL
server with default setting (user 'root' with no password) */

$link = mysqli_connect("localhost", "root", "Godzilla7", "ucsd");

// Check connection
if($link === false){
    die("ERROR: Could not connect. " . mysqli_connect_error());
}

// Escape user inputs for security
$first_name = mysqli_real_escape_string($link, $_POST['firstname']);
$last_name = mysqli_real_escape_string($link, $_POST['lastname']);
$mail_address = mysqli_real_escape_string($link, $_POST['address']);
$city_address = mysqli_real_escape_string($link, $_POST['city']);
$zip_address = mysqli_real_escape_string($link, $_POST['zip']);
$email_address = mysqli_real_escape_string($link, $_POST['email']);
$type = mysqli_real_escape_string($link, $_POST['type']);
$r_date = mysqli_real_escape_string($link, $_POST['r_date']);
$c_date = mysqli_real_escape_string($link, $_POST['c_date']);
$note = mysqli_real_escape_string($link, $_POST['note']);
$indexNum = mysqli_real_escape_string($link, $_POST['indexNum']);
$bill = mysqli_real_escape_string($link, $_POST['billing']);
$billing_a = mysqli_real_escape_string($link, $_POST['billing_a']);
$billing_e = mysqli_real_escape_string($link, $_POST['billing_e']);

// check to see that the data is filled out
if(!$first_name || !$last_name || !$email_address || !$indexNum){
    echo " You have not entered all the required details.<br/>
           Please try again.";
    exit;
}

// attempt insert query execution
$sql = "INSERT INTO btc (first_name, last_name, mail_address, city_address, zip_address, email_address, type, r_date, c_date, note, indexNumber, bill, billing_a, billing_e)
        VALUES ('$first_name', '$last_name', '$mail_address', '$city_address', '$zip_address', '$email_address', '$type', '$r_date', '$c_date', '$note', '$indexNum', '$bill', '$billing_a', '$billing_e')";


/* if the insert is successful, the following three things will happen
 * 1. the index number for the insert will be pulled from the database
 * 2. the user email will be pulled based on the index number
 * 3. the user will be emailed the index number
 */
if(mysqli_query($link, $sql)){
    echo "Records added successfully. <br>";         

}else{
    echo "ERROR: Could not able to execute $sql. " . mysqli_error($link);
}

$sql = "SELECT index FROM btc ORDER BY index DESC LIMIT 1";
if($result_i = mysqli_query($link, $sql)){
    // debugging statement, currently not showing up
    echo "index is $result_i";
}else{
    echo "ERROR: Could not able to execute $sql. " . mysqli_error($link);
}

$sql = "SELECT email_address FROM btc ORDER BY index DESC LIMIT 1";
if($result_e = mysqli_query($link, $sql)){
    echo "Email is $result_e";
}else{
    echo "ERROR: Could not able to execute $sql. " . mysqli_error($link);
}

//pass index and email to mail msg and send to user
$msg = "Thank you very much for your order, your ID is $result_i.";
$msg = wordwrap($msg, 70);
mail($result_e, "Your Order", $msg);


// close connection
mysqli_close($link);

现在索引编号没有被拉出，我收到以下错误：

错误：无法执行SELECT索引FROM btc ORDER BY索引DESC LIMIT 1.您的SQL语法中有错误;检查与您的MySQL服务器版本相对应的手册，以便使用索引附近的正确语法FROM btc ORDER BY index DESC LIMIT 1＆＃39;在第1行

Answer 1

index是MySQL中的保留字

点击此处：http://dev.mysql.com/doc/refman/5.6/en/reserved-words.html

您仍然使用字段名称索引，但它需要以反引号引用：

$sql = "SELECT `index` FROM btc ORDER BY `index` DESC LIMIT 1";

使用PHP和MYSQL提取上次ID和电子邮件地址并向用户发送电子邮件

1 个答案: