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Problems displaying all records after updating a record

raymon

By raymon
in PHP Coding Help

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raymon Newbie

raymon

Posted
Posted (edited)

I making an web app for teachers to assess their students online. The problems I am currently having are on select only one record is displayed and after update no records are displayed in the form even though it was successfully updated.. The program has two files, index.php and process.php. The problems started when got the class name into the query to search and display the class. 

$result = $mysqli->query("SELECT * FROM data WHERE classroom = '".$classroom."' ORDER BY '.name';") or die($mysqli->error);

The query works but doesn't order by name I would like. I would be grateful if anyone could cast an eye over it and give me some tips.

Thanks guys. The beers are on me if anyone can sort it, but you'll have to come to Phnom Penh, Cambodia as that is where I live.

Anyway here's the code. process.php 

<html>
<?php
session_start();

$mysqli = new mysqli("localhost","ray","password","reports") or die(mysqli_error($mysqli));

$id = 0;
$update = false;
$name = '';
$classroom = '';


if (isset($_GET['edit'])){
    $id = $_GET['edit'];
    $update = true;
    $result = $mysqli->query("SELECT * FROM data WHERE id=$id") or die($mysqli->error());
    if(isset($result->num_rows) && $result->num_rows > 0) {
        $row = $result->fetch_array();
        $name = $row['name'];
        $classroom = $row['classroom'];
        $pacomment = $row['pacomment'];           
    }
}

if (isset($_POST['update'])){
    $id = $_POST['id'];
    $pacomment = $_POST['pacomment'];   
    $mysqli->query("UPDATE data SET pacomment= '$pacomment' WHERE id=$id") or die($mysqli->error);
    
    $_SESSION['message'] = "Record has been updated!";
    $_SESSION['msg_type'] = "warning";

    header('location: index.php');

}

index,php 


<?php require_once 'process.php'; ?>
 <!--************************************** Setup Messages **************************************** -->
<?php if (isset($_SESSION['message'])): ?>
            <div class="alert alert-<?=$_SESSION['msg_type']?>">
                <?php 
                    echo $_SESSION['message']; 
                    unset($_SESSION['message']);
                ?>
            </div>
        <?php endif ?>
  <!--**************************************End  Setup Messages ***********************************************  -->
<?php

?>
<!DOCTYPE html>
<html>
    <head>
    <title>Home of English Reports</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>

  <style>= 
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

.topnav {
  overflow: hidden;
  background-color: #008080;
}

.topnav a {
  float: left;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.topnav a:hover {
  background-color: #ddd;
  color: black;
}

.topnav a.active {
  background-color: #4CAF50;
  color: white;
}
</style>

</head>
<body style="background-color:linen;">


 <!--************************************** End Setup Page Styles ************************************* -->
<div class="container">
<form action="index.php" method = get>
    <label for="classroom">Class name:</label><br>
    <input type="text" id="classroom" name="classroom" value="107i am"><br>

    <input type="submit" value="Submit">
</form>
</div>

 <?php $resultcomment = $mysqli->query("SELECT EnglishComment FROM comments"); ?>

    <!-- ************************************** Begin Connect DB  ************************************************ -->
    
        <div class="container" align-content-center>
        <?php
        $classroom = (isset($_GET['classroom']) ? $_GET['classroom'] : null);
        $result = $mysqli->query("SELECT * FROM data WHERE classroom = '".$classroom."' ORDER BY '.name';") or die($mysqli->error);

        ?>
    <!-- ************************************** End Connect DB ****************************************************  -->

    <div class="row justify-content-center">
        <form action="process.php" method="POST">
            <input type="hidden" name="id" value="<?php echo $id; ?>">

            <div class="form-group">
                <h1><label><?php echo $name?></label></h1>
            </div>



            <form action="process.php" method="POST">
            <input type="hidden" name="id" value="<?php echo $id; ?>">

            <div class="form-group">
                <h3><label>PA Teacher's Comment</label></h3> <select name = "pacomment">
               <?php
                    while($rows = $resultcomment-> fetch_assoc())
                    {
                        $EnglishComment = $rows['EnglishComment'];
                        echo "<option value='$EnglishComment'>$name.$EnglishComment</option>";
                    }
                    ?></h2> 
                </select><br>
                <p>

            <div class="form-group">
            <?php 
            if ($update == true): 
            ?>
                <button type="submit" class="btn btn-info" name="update">Update</button>
            <?php else: ?>
                <!-- <button type="submit" class="btn btn-primary" name="save">Save</button> -->
            <?php endif; ?>
            </div>
        </form>

    <!-- ************************************** Begin Setup Table Headers ******************************************   -->        
            <div class="row justify-content-center">
                <table class="table" width = "20%" border = "5" cellpadding = "1";>
                    <thead>
                        <tr>
                            <th><center>Action</center></th>
                            <th><center>ID</center></th>
                            <th>Name and Comment</th>
                        </tr>
                    </thead>
                    
    <!-- ************************************** End Setup Classlist Table Headers ******************************************   -->
    
    <!-- ****** Loop thru Every Record From $result Query Variable and get variables and echo each variable into the table rows  **********   -->
            <?php
                while ($row = $result->fetch_assoc()): ?>

            <tr>
                        <td>
                        <center><a href="index.php?edit=<?php echo $row['id']; ?>"
                            class="btn btn-info">Assess</a></center>                         
                        </td>
    <!-- ************************************** Put data into Classlist table rows ******************************************   -->
                    
                        <td><center><?php echo $row['studentid']; ?></center></td>
                        <td><?php echo $row['name']." ".$row['pacomment'] ?></td>
                        
            </tr>
                  
            <?php endwhile; ?>  <!-- ****************** End While() Loop ****************************   --> 
    
                </table> <!-- *************** End of Classlist Table  ******************************************   -->

            </div> 
   
        </div>
        </div>
    </body>

</html>

 

 

 

842248714_afterselectclass.jpg.b8cc3f8af3e665082b1d0ec2d9fa812f.jpg1279868204_afterupdate.jpg.64615757d484dd339a4572847569312e.jpg

 

db2.jpg

Edited by raymon
gw1500se Prolific Member

gw1500se

Posted
Posted

Using '.name' is definitely wrong as it looks like 'name' is the column you want. I suspect that is because of a misplaced quote which are unnecessary anyway. You also should not be using 'SELECT *'. List only those those columns you actually need. Your first query is dangerous. You need to use prepared statements. Never use web page data directly into a query as you are at risk of injection attacks. Finally the ';' is not really needed but that is a minor point. 

$result = $mysqli->query("SELECT studentid,name,pacomment FROM data WHERE classroom = $classroom ORDER BY name") or die($mysqli->error);

 

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