How to delete user from MySQL database - php

Question

I am a new PHP programmer. I created a user login page where can i see list of user who is logged in. I am using PDO for connecting database. The Problem is if I want to delete user from the list it only delete the last inserted user. What i am doing wrong ? Can someone please help me...
Here is my HTML code:
<form action="" method="post">
<?php
foreach($rows as $row){
$time = $row['time_out'];
echo "
<input type='text' value='$row[user_name]' name='user_name'>
<input type='text' value=' $row[course]' name='course'>
<input type='text' value=' $time'>
<input type='submit' value='submit' name='submit'>
<br>";
}
?>
</form>
if(isset($_POST['submit'])){
//get course
$course = $_POST['course'];
//get user_name
$user_name = $_POST['user_name'];
//deleting user from the database
$database->delete($user_name);
//Redirect to current page
header('Location: tutor.php');
exit;
}
Here is my method for getting logged in user:
public function selectFromOnline()
{
$sql = $this->connection()->prepare("SELECT * FROM online");
$sql->execute();
return $sql->fetchAll();
}
Here is my method for deleting user:
public function delete($user_name)
{
$sql = $this->connection()->prepare("DELETE FROM online WHERE user_name = :user_name");
$sql->bindValue(':user_name', $user_name, PDO::PARAM_STR);
$sql->execute();
return $sql;
}

Answer 1

Sorry But I didn't understand your code but I understood your problem and here it is my solution with "mysqli_query"....
<?php
//Please set these veriables according to your values....
$host_name = "YOUR_DB_HOST_NAME"; //Normally 'localhost'
$password = "YOUR_PASSWORD_FOR_MYSQL"; //your password
$username = "YOUR_USERNAME_FOR_MYSQL"; //Normally Root
$database_name = "NAME_OF_YOUR_DATABASE";
$connect = mysqli_connect($host_name, $username, $password, $database_name);
if(!$connect){
echo "Something is Wrong Please Check your host name, user name, password or database name";
}
?>
<!--YOUR FORM STARTS----------------------------------------------------->
<!--DON'T FORGET TO SET ACTION TO #(ON THE SAME PAGE)------------------------------------>
<form action="#" method="post">
<?php
foreach($rows as $row){
$time = $row['time_out'];
//Any Two Input Fields Cant have same Name So...
echo "
<input type='text' value='$row[user_name]' name='user_name_display'>
<input type='text' value=' $row[course]' name='course'>
<input type='text' value=' $time'>
<input type='hidden' value='$row[user_name]' name='user_name'>
<input type='submit' value='submit' name='submit'>
<br>";
}
?>
</form>
<!--YOUR FORM ENDS----------------------------------------------------->
<?PHP
if(isset($_POST['submit'])){
//get course
$course = $_POST['course'];
//get user_name
$user_name = $_POST['user_name'];
//Creating and running mysqli query
$delete = "DELETE FROM online WHERE user_name='$user_name'";
$query = mysqli_query($connect, $delete);
if($query){
//Code to run when user is deleted
header("Location: tutor.php")
}else{
//Error to show when can't delete user
echo "Sorry Can't delete the user";
}
}
?>
Just forget about some semicolons and some minor errors (if there is any), It'll Defiantly Work....
Please Don't Forget to Vote if it works....

Answer 2

The problem is that every input has the same name so you get nothing when you try to obtain POST values. Try a different approach. Maybe you can add a new field (hyperlink) that performs the redirect action and send the parameters of deleting action with GET.
Example:
echo "
<input type='text' value='$row[user_name]' name='user_name'>
<input type='text' value=' $row[course]' name='course'>
<input type='text' value=' $time'>
<a href='Test.php?username=$row[user_name]&course=$row[course]'>delete</a>
<br>";
}
Test.php is the name of your php page.
Then you can query the database by using the the GET value:
$_GET["username"]