Question

我正在尝试使用 data.html 中创建的表单更新名为发布的数据库。文件 pubupdate.php 用于更新通过 data.html 链接的数据库。

第一次更新时，它正在更新数据库，但 projcont1 = NULL，projcont2 = NULL，volume = NULL，startpage with endpage 和 endpage = NULL 。休息一切都很好。 已解决的问题

在下次更新时，表项目和日志根本没有更新，而其他表正在更新并发出以下错误。

注意：未定义的索引：第16行的C：\ xampp \ htdocs \ Publication \ pubupdate.php中的projid

注意：未定义的索引：第20行的C：\ xampp \ htdocs \ Publication \ pubupdate.php中的papertitle

注意：未定义的索引：第30行的C：\ xampp \ htdocs \ Publication \ pubupdate.php中的jtitle 奇怪的错误

我发布了这两个代码，请帮助我，因为我已经花了很多时间来调试它。我是编程的新手。

data.html

<html>

<title> Publication v.0.0.1 </title>


 <div align = "center">

 <form action = "pubupdate.php" method = "post">
 <p>Paper Type :<br> <select name="papertype"></p>
 <option value="">Paper Type...</option>
 <option value="journaltype">Journal</option>
 <option value="conferencetype">Conference</option>
 </select>
 <br></br>
 First Author : <br><input type = "text" name = "firstauthor">
 <br></br>
 Co-Authors : <br><input type = "text" name = "coauthor">
 <br></br>
 Title :  <br><input type = "text" name = "ptitle">
 <br></br>
 Abstract :  <br><textarea name = "abstract" rows = 10 cols = 50></textarea>
 <br></br>
 Conference / Journal Name :  <br><input type = "text" name = "namecon">
 <br></br>
 Conference / Publication Date : <br> <input type = "text" name = "date">
 <br></br>
 Start Page No:  <br><input type = "text" name = "startpage">
 <br></br>
 End Page No: <br> <input type = "text" name = "endpage">
 <br></br>

 Area: <br> <input type = "text" name = "area">
 <br></br>

 Project Name 1 : <br> <input type = "text" name = "projname1">
<br></br>
 Project ID 1 : <br> <input type = "text" name = "projid1">
<br></br>
Contribution : <br> <select name="projcont1">
 <option value="">Contribution...</option>
 <option value="10">10 </option>
 <option value="20">20</option>
 </select>
<br></br>

Project Name 2 : <br> <input type = "text" name = "projname2">
<br></br>
 Project ID 2 : <br> <input type = "text" name = "projid2">
<br></br>
Contribution :  <br> <select name="projcont2">
 <option value="">Contribution...</option>
 <option value="10">10  </option>
 </select>
<br></br>

ISSN : <br> <input type = "text" name = "issn">
<br></br> 
Impact Factor : <br> <input type = "text" name = "imfac">
<br></br> 
ISBN : <br> <input type = "text" name = "isbn">
<br></br> 
SCI/ SSCI/ AHCI :  <br><input type = "text" name = "sci">
<br></br> 
Location : <br><select name="location">
<option value="">Location...</option>
<option value="domestic">Domestic</option>
</select>   
<br></br> 
Issue :  <br><input type = "text" name = "issue">
<br></br> 
Volume :  <br><input type = "text" name = "volume">
<br></br> 


 Country : <br><select name="country">
<option value="">Country...</option>
<option value="AF">Afghanistan</option>

</select>
<br></br>


<input type ="submit" value ="Update this Publication List">

</form>
</div>
</html>

pubupdate.php

 <?php


 // Updating the values of Table "Paper"
 $typereg = $_POST['papertype'];
 $ptitlereg = $_POST['ptitle'];
 $fauthorreg = $_POST['firstauthor'];
 $coauthorreg = $_POST['coauthor'];
 $abstractreg = $_POST['abstract'];
 $nameconreg = $_POST['namecon'];
 $areareg = $_POST['area'];
 $datereg = $_POST['date'];
 $startpagereg = $_POST['startpage'];
 $endpagereg = $_POST['endpage'];
 $projidreg = $_POST['projid'];
 $countryreg = $_POST['country'];

 // Updating the values of Table "Project"
 $papertitlereg = $_POST['papertitle'];
 $projname1reg = $_POST['projname1'];
 $projid1reg = $_POST['projid1'];
 $projcont1reg = $_POST['projcont1'];
 $projname2reg = $_POST['projname2'];
 $projid2reg = $_POST['projid2'];
 $projcont2reg = $_POST['projcont2'];

 // Updating the values of Table "Journal"
 $issnreg = $_POST['issn'];
 $jtitlereg = $_POST['jtitle'];
 $imfacreg = $_POST['imfac'];
 $isbnreg = $_POST['isbn'];
 $scireg = $_POST['sci'];
 $locationreg = $_POST['location'];
 $issuereg = $_POST['issue'];
 $volumereg = $_POST['volume'];

 // Create Local variable
 $taken = "false";
 $database = "publication";
 $password = "";
 $username = "root";

 // Main if statement
 //if($userreg && $passreg){

// Connect to database
$con = mysql_connect('localhost', $username, $password) or die("Unable to connect database");
@mysql_select_db($database, $con) or die("Unable to connect");

mysql_query("INSERT INTO `paper` VALUES('$typereg', '$ptitlereg','$fauthorreg','$coauthorreg','$abstractreg' ,'$nameconreg', '$areareg','$datereg', '$startpagereg', '$endpagereg','','$countryreg' )") or die("Strange Error");

 mysql_query("INSERT INTO `journal` VALUES('$issnreg', '','$imfacreg','$isbnreg','$scireg' ,'$locationreg', '$issuereg','$volumereg')") or die("Strange Error");

 mysql_query("INSERT INTO `project` VALUES( '','$projname1reg','$projid1reg','$projcont1reg' ,'$projname2reg', '$projid2reg','$projcont2reg')") or die("Strange Error");

echo "Account Created";

mysql_close($con);

header('Location: home.php');



 ?>

Answer 1

请尝试以下代码。我已经添加了检查是否存在值，如果某个值不存在则会添加“NA”，您可以根据需要更改此字符串。下面的代码将帮助您进行更多调试。

<?php
//$userreg = isset() ? htmlspecialchars($_POST['user']);
//$passreg = isset() ? htmlspecialchars($_POST['pass']);

// Updating the values of Table "Paper"
$typereg =  isset($_POST['papertype']) ? htmlspecialchars($_POST['papertype']):"NA";
$ptitlereg = isset($_POST['ptitle']) ? htmlspecialchars($_POST['ptitle']):"NA";
$fauthorreg = isset($_POST['firstauthor']) ? htmlspecialchars($_POST['firstauthor']):"NA";
$coauthorreg = isset($_POST['coauthor']) ? htmlspecialchars($_POST['coauthor']):"NA";
$abstractreg = isset($_POST['abstract']) ? htmlspecialchars($_POST['abstract']):"NA";
$nameconreg = isset($_POST['namecon']) ? htmlspecialchars($_POST['namecon']):"NA";
$areareg = isset($_POST['area']) ? htmlspecialchars($_POST['area']):"NA";
$datereg = isset($_POST['date']) ? htmlspecialchars($_POST['date']):"NA";
$startpagereg = isset($_POST['startpage']) ? htmlspecialchars($_POST['startpage']):"NA";
$endpagereg = isset($_POST['endpage']) ? htmlspecialchars($_POST['endpage']):"NA";
$countryreg = isset($_POST['country']) ? htmlspecialchars($_POST['country']):"NA";

// Updating the values of Table "Project"
$papertitlereg = isset($_POST['papertitle']) ? htmlspecialchars($_POST['papertitle']):"NA";
$projname1reg = isset($_POST['projname1']) ? htmlspecialchars($_POST['projname1']):"NA";
$projid1reg = isset($_POST['projid1']) ? htmlspecialchars($_POST['projid1']):"NA";
$projcont1reg = isset($_POST['projcont1']) ? htmlspecialchars($_POST['projcont1']):"NA";
$projname2reg = isset($_POST['projname2']) ? htmlspecialchars($_POST['projname2']):"NA";
$projid2reg = isset($_POST['projid2']) ? htmlspecialchars($_POST['projid2']):"NA";
$projcont2reg = isset($_POST['projcont2']) ? htmlspecialchars($_POST['projcont2']):"NA";

// Updating the values of Table "Journal"
$issnreg = isset($_POST['issn']) ? htmlspecialchars($_POST['issn']):"NA";
$jtitlereg = isset($_POST['jtitle']) ? htmlspecialchars($_POST['jtitle']):"NA";
$imfacreg = isset($_POST['imfac']) ? htmlspecialchars($_POST['imfac']):"NA";
$isbnreg = isset($_POST['isbn']) ? htmlspecialchars($_POST['isbn']):"NA";
$scireg = isset($_POST['sci']) ? htmlspecialchars($_POST['sci']):"NA";
$locationreg = isset($_POST['location']) ? htmlspecialchars($_POST['location']):"NA";
$issuereg = isset($_POST['issue']) ? htmlspecialchars($_POST['issue']):"NA";
$volumereg = isset($_POST['volume']) ? htmlspecialchars($_POST['volume']):"NA";

// Create Local variable
$taken = "false";
$database = "publication";
$password = "";
$username = "root";

// Main if statement
//if($userreg && $passreg){

// Connect to database
$con = mysqli_connect('localhost', $username, $password,$database);

                if ($con->connect_error) {
                    die("Connection failed: " . $con->connect_error);
                }


mysqli_query($con,"INSERT INTO `paper` VALUES('$typereg', '$ptitlereg','$fauthorreg','$coauthorreg','$abstractreg' ,'$nameconreg', '$areareg','$datereg', '$startpagereg', '$endpagereg','$projid1reg','$countryreg' )") or die("Strange Error");

mysqli_query($con,"INSERT INTO `journal` VALUES('$issnreg', '$ptitlereg','$imfacreg','$isbnreg','$scireg' ,'$locationreg', '$issuereg','$volumereg')") or die("Strange Error");

mysqli_query($con,"INSERT INTO `project` VALUES( '$ptitlereg','$projname1reg','$projid1reg','$projcont1reg' ,'$projname2reg', '$projid2reg','$projcont2reg')") or die("Strange Error");

echo "Account Created";

mysqli_close($con);

header('Location: home.php');

 //} else {

//echo "You need to have both a username and password";
//}


?>

使用php文件第二次更新数据库时出错

1 个答案: