Button to delete row from table - PHP SQL - php

Question

I have a web page that outputs data from my sql database. Each row has a delete button that should delete the data in this particular row. I am having a issue where when I click the delete button it always deletes the row with the first/lowest ID regardless of which button I click. It doesnt delete the row I want it to delete. Here is my code:
HTML
<form action="process.php" method="post">
<?php
$sql = "
SELECT *
FROM playerTeam
";
$result = mysqli_query($connection, $sql);
?>
<table>
<?php
if (mysqli_num_rows($result) > 0) {
while ($row = mysqli_fetch_assoc($result)) { ?>
<tr>
<td><input type="text" name="id" value="<?php echo $row['id']?>"></td>
<td><input type="text" name="fName[]" value="<?php echo $row['firstName']?>"></td>
<td><input type="text" name="sName[]" value="<?php echo $row['surName']?>"></td>
<td><input type="text" name="team[]" value="<?php echo $row['team']?>"></td>
<td><input type="submit" name="delete" value="Delete"></td>
<td><input type="submit" name="update" value="Update"></td>
</tr>
<?php
}
}
?>
</table>
</form>
process.php
if (isset($_POST['delete'])) {
$id = $_POST['id'];
$sql = "DELETE FROM playerTeam WHERE id='$id'";
if (mysqli_query($connection, $sql)) {
echo "Record deleted";
} else {
echo "Error: " . $sql . "<br>" . mysqli_error($connection);
}
}
please could someone help me. Thanks

Answer 1

Because you delete the value of last id in
$id = $_POST['id'];
$sql = "DELETE FROM playerTeam WHERE id='$id'";
the value of $_POST['id'] is equal to last row in <?php echo $row['id']?>
in each run of the while the $_POST['id'] value replaced by new $row['id'] so the last on would be read in $_POST['id']

Answer 2

As you are using while($row = mysqli_fetch_assoc($result)), this will loop to the last row in your MySQL Table, thus every time, it will have the last id of your table.
You can code it in a way that your delete script will get the id. So, your delete button for each row will be have the row id, e.g. process.php?1, process.php?2, process.php?3 and so on.
tablepage.php (not sure of your page's real name)
Replace this line:
<td><input type="submit" name="delete" value="Delete"></td>
With this:
<td><p><a href="/process.php?id=<?php echo $id; ?>"></td>
process.php?id=1
// this will get `id=1` and thus your `id` will be `1`, and it will delete row `1`.
$id = $_GET['id'];
$sql = "DELETE FROM playerTeam WHERE id='$id'";
if (mysqli_query($connection, $sql)) {
echo "Record deleted";
} else {
echo "Error: " . $sql . "<br>" . mysqli_error($connection);
}
Hope that helps, thanks!

Answer 3

In actual in this condition ,use ajax and jquery is much more easier i think .But do only by php gonna be use logic code
$i = 0;
while($row = mysqli_fetch_assoc($result))
{
?>
<tr>
<td><input type="text" name="id_<?= $i ?>" value="<?php echo $row['id']?>"></td>
<td><input type="text" name="fName[]" value="<?php echo $row['firstName']?>"></td>
<td><input type="text" name="sName[]" value="<?php echo $row['surName']?>"></td>
<td><input type="text" name="team[]" value="<?php echo $row['team']?>"></td>
<td><input type="submit" name="delete[<?= $i ?>]" value="Delete"></td>
<td><input type="submit" name="update[<?= $i ?>]" value="Update"></td>
</tr>
<?php
$i++; //for unique num for each row
}
process.php
if (isset($_POST['delete'])){
$delete_id = array_keys($_POST['delete']);//print array key as a array
$delete_id = $delete_id[0];//so get array key
$id = $_POST["id_$delete_id"];//get its relative id
.....
}