How to get input type value from a table using php

Question

why $_POST['destination'] does not have a value? Please Help

How to get value from input type

<?php while ($row = mysqli_fetch_array($result)){ ?>
    <tr>
        <td><?php echo $row['id']; ?></td>
        <td><input type="number" name="day" placeholder="<?php echo $row['day']; ?>"></td>
        <td><input type="text" name="destination" placeholder="<?php echo $row['destination']; ?>"></td>
        <td><a href="index24.php?delete=<?php echo $row['id']; ?>" class="btn btn-danger"> Edit </a></td>
    </tr>
<?php } ?>

//index24.php
$db = mysqli_connect("localhost", "root", "", "testing");
if (isset($_GET['delete'])){
    $id = $_GET['delete'];
    $destination = $_POST['destination']; //why $_POST['destination'] does not have a value?
    $day = $_POST['day'];
    $query = "UPDATE tbl_itinerary SET destination = '$destination', day = '$day' WHERE id =  '" . $id . "'";
    mysqli_query($db,$query);
    header('location: index4.php');
}

Answer 1

Put values on input value="" attribute not in placeholder.

    <?php while ($row = mysqli_fetch_array($result)){ ?>
<tr>
    <td><?php echo $row['id']; ?></td>
    <td><input type="number" name="day" value="<?php echo $row['day']; ?>" placeholder=""></td>
    <td><input type="text" name="destination" value="<?php echo $row['destination']; ?>" placeholder=""></td>
    <td><a href="index24.php?delete=<?php echo $row['id']; ?>" class="btn btn-danger"> Edit </a></td>
</tr>

Answer 2

Don't echo out values in placeholder. You can do it in this way:

value="<?php echo $row['day']; ?>

Not like this placeholder="<?php echo $row['day']; ?>"

“Placeholder is meant to show hints to the users what to type in the field”

EDIT

<?php while ($row = mysqli_fetch_array($result)){ ?>
    <tr>
        <td><?php echo $row['id']; ?></td>
        <td><input type="number" name="day" value="<?php echo $row['day']; ?>"></td>
        <td><input type="text" name="destination" value="<?php echo $row['destination']; ?>"></td>
 <td><a href="index24.php?delete=<?php echo $row['id']; ?>" class="btn btn-danger"> Edit </a></td>
    </tr>
<?php } ?>

//index24.php
//covertion is important here

$id = intval($_GET['delete']);
$db = mysqli_connect("localhost", "root", "", "testing");
//submit - would be the name of button in your <form> tag.

if (isset($_GET['submit'])){

$destination = $_POST['destination'];
$day = $_POST['day'];

$query = "UPDATE tbl_itinerary SET destination = '$destination', day = '$day' WHERE id =  '" . $id . "'";
   mysqli_query($db,$query);
   header('location: index4.php');
}

Maybe this will help you...

You were getting value of id as string. You need to convert it to int.

I would recommend you to use procedures to prevent sql injection.

Answer 3

Looking at you code snippet, you can handle this scenario in following different ways :

1. $_POST is part of form handing, so if you need to use $row['destination'] in a different page you need to have it added with in <form> tag and mention the page in 'action' attribute. Read Here
2. Since you are using $_GET to get the id value in index24.php page you can query to get all the data with WHERE clause.
3. Use Ajax Example