Question

我创建了一个表单，我正在尝试将数据发布到MySQL databasem，但在提交表单后，我收到以下错误..

注意：未定义的索引：第14行的C：\ xampp \ htdocs \ auto \ insert_ac.php中的月份
  注意：未定义的索引：第15行的C：\ xampp \ htdocs \ auto \ insert_ac.php中的listner_name
  注意：未定义的索引：第16行的C：\ xampp \ htdocs \ auto \ insert_ac.php中的rj_name
  注意：未定义的索引：第17行的C：\ xampp \ htdocs \ auto \ insert_ac.php中的通道
  注意：未定义的索引：第18行的C：\ xampp \ htdocs \ auto \ insert_ac.php中的年份
  注意：未定义的索引：第19行的C：\ xampp \ htdocs \ auto \ insert_ac.php中的国家/地区

当我检查插入数据库的空白行条目

时

<?php

$host="localhost"; // Host name
$username="root"; // Mysql username`
$password=""; // Mysql password
$db_name="auto"; // Database name
$tbl_name="song_request"; // Table name

// Connect to server and select database.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");

// Get values from form
$month=mysql_real_escape_string($_POST['month']);
$listner_name=mysql_real_escape_string($_POST['listner_name']);
$rj_name=mysql_real_escape_string($_POST['rj_name']);
$channel=mysql_real_escape_string($_POST['channel']);
$year=mysql_real_escape_string($_POST['year']);
$country=mysql_real_escape_string($_POST['country']);

// Insert data into mysql

$sql="INSERT INTO song_request (month, listner_name, rj_name, channel, year, country)VALUES('$month', '$listner_name', '$rj_name', '$channel', '$year', '$country')";
$result=mysql_query($sql) or die ('error Updating database');

// if successfully insert data into database, displays message "Successful".
if($result){
echo "Successful";
echo "<BR>";
echo "<a href='index.html'>Back to main page</a>";
}

else {
echo "ERROR";
}

// close connection
mysql_close();
?>

我的HTML表单代码是

<!DOCTYPE html>

<html lang="en">
<head>
  <meta charset="utf-8">

  <title>Radio Mantra Song Request</title>
  <link href="css/jquery.autocomplete.css" rel="stylesheet" type="text/css">
  <link href="css/main.css" rel="stylesheet" type="text/css">
  <script type="text/javascript" src="js/jquery-1.5.2.min.js">
</script>
  <script type="text/javascript" src="js/jquery.autocomplete.pack.js">
</script>
  <script type="text/javascript" src="js/script.js">
</script>
</head>

<body>
  <div class="container">
    <form name="form" method="post" action="insert_ac.php">
      <p><label>Location:</label> <input id="month" type="text" autocomplete="off"></p>

      <p><label>Listner Name:</label> <input id="listner_name" type="text" autocomplete=
      "off"></p>

      <p><label>RJ Name:</label> <input id="rj_name" type="text" autocomplete="off"></p>

      <p><label>Channel:</label> <input id="channel" type="text" autocomplete="off"></p>

      <p><label>Show Name:</label> <input id="year" type="text" autocomplete="off"></p>

      <p><label>Song:</label> <input id="country" type="text" autocomplete="off"></p>

      <h2>Radio Mantra</h2>

      <table>
        <tr>
          <td align="center"><input type="submit" name="submit" value="Submit"></td>
        </tr>
      </table>
    </form>
  </div>
</body>
</html>

Answer 1

您需要在表单元素上使用 name 属性才能访问$ _POST中的值。

 <input id="month" name="month" type="text" autocomplete="off">

Answer 2

除了使用SeanNieuwoudt指出的name属性之外，您还应该在插入数据库之前检查请求方法是否为POST。如果您不这样做并且有人决定将您的insert_ac.php页面视为GET请求，它将生成与之前相同的通知并插入空白数据。

例如

if($_SERVER['REQUEST_METHOD'] == 'POST')
{
    // go ahead and insert
}

Answer 3

你的表单元素中应该有一个name属性。

您收到此错误可能是因为未填充值。

Notice: Undefined index: month in C:\xampp\htdocs\auto\insert_ac.php on line 14
Notice: Undefined index: listner_name in C:\xampp\htdocs\auto\insert_ac.php on line 15
Notice: Undefined index: rj_name in C:\xampp\htdocs\auto\insert_ac.php on line 16
Notice: Undefined index: channel in C:\xampp\htdocs\auto\insert_ac.php on line 17
Notice: Undefined index: year in C:\xampp\htdocs\auto\insert_ac.php on line 18
Notice: Undefined index: country in C:\xampp\htdocs\auto\insert_ac.php on line 19

如果您有类似$_POST["test"]的内容，则必须通过执行此操作来检查此索引是否存在：

if(isset($_POST["test"]))

所以就像使用以下

一样

if(isset($_POST['submit']))
{
$month=mysql_real_escape_string($_POST['month']);
$listner_name=mysql_real_escape_string($_POST['listner_name']);
$rj_name=mysql_real_escape_string($_POST['rj_name']);
$channel=mysql_real_escape_string($_POST['channel']);
$year=mysql_real_escape_string($_POST['year']);
$country=mysql_real_escape_string($_POST['country']);

// Insert data into mysql

$sql="INSERT INTO song_request (month, listner_name, rj_name, channel, year, country)VALUES('$month', '$listner_name', '$rj_name', '$channel', '$year', '$country')";
$result=mysql_query($sql) or die ('error Updating database');
}

表单发布到数据库

3 个答案: