Firebase in PHP Part-6: How to delete data from firebase database in php

How to delete data from firebase database in php


here, in this post, we are deleting the data from firebase database in php.

Step 1: Create a index.php file and paste below code:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Firebase in PHP</title>
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
</head>
<body>
    
    <section class="mt-5">
        <div class="container">
            <div class="row">
                <div class="col-md-12">
                    <?php
                        if(isset($_SESSION['status']) && $_SESSION['status'] !=''
                        {
                            echo '
                            <div class="alert alert-warning alert-dismissible fade show" role="alert">
                                <strong>Hey!</strong> '.$_SESSION['status'].'
                                <button type="button" class="close" data-dismiss="alert" aria-label="Close">
                                    <span aria-hidden="true">&times;</span>
                                </button>
                            </div>
                            ';
                            unset($_SESSION['status']);
                        }
                    ?>
                    <div class="card">
                        <div class="card-body">
                            <div class="row">
                                <div class="col-md-8">
                                    <h4>Contact Details - Retrieve/Get/Fetch Data from Firebase (Datbase) in PHP</h4>
                                </div>
                                <div class="col-md-4 text-right">
                                    <form action="code.php" method="POST">
                                        <button type="submit" name="reset_data" class="btn btn-danger">Clear Data</button>
                                        <a href="insert.php" class="btn btn-primary ml-3">Add</a>
                                    </form>
                                </div>
                            </div>
                            <hr>
                            <table class="table table-bordered">
                                <thead class="table-dark">
                                    <tr>
                                        <th>id</th>
                                        <th>Name</th>
                                        <th>Email</th>
                                        <th>Phone Number</th>
                                        <th>Edit</th>
                                        <th>Delete</th>
                                    </tr>
                                </thead>
                                <tbody class="">
                                    <?php 
                                        include('includes/dbcon.php');

                                        $ref = "contact";
                                        $getdata = $database->getReference($ref)->getValue();
                                        $i = 0;
                                        if($getdata > 0)
                                        {
                                            foreach($getdata as $key => $row)
                                            {
                                                $i++;
                                        ?>
                                        <tr>
                                            <td><?php echo $i?></td>
                                            <td><?php echo $row['name']; ?></td>
                                            <td><?php echo $row['email']; ?></td>
                                            <td><?php echo $row['phone']; ?></td>
                                            <td>
                                                <a href="edit.php?token=<?php echo $key?>" class="btn btn-primary">Edit</a>
                                            </td>
                                            <td>
                                                <form action="code.php" method="POST">
                                                    <input type="hidden" name="ref_token_delete" value="<?php echo $key?>">
                                                    <button type="submit" name="delete_data" class="btn btn-danger">Delete</button>
                                                </form>
                                            </td>
                                        </tr>
                                        <?php
                                            }
                                        }
                                        else
                                        {
                                            ?>
                                            <tr class="text-center">
                                                <td colspan="6">DATA NOT THERE IN DATABASE</td>
                                            </tr>
                                            <?php
                                        }
                                    ?>
                                </tbody>
                            </table>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </section>

    <script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>

    <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script>

    <script src="https://www.gstatic.com/firebasejs/7.14.0/firebase-app.js"></script>
    <!-- If you enabled Analytics in your project, add the Firebase SDK for Analytics -->
    <script src="https://www.gstatic.com/firebasejs/7.14.0/firebase-analytics.js"></script>
    <!-- Add Firebase products that you want to use -->
    <script src="https://www.gstatic.com/firebasejs/7.14.0/firebase-auth.js"></script>
    <script src="https://www.gstatic.com/firebasejs/7.14.0/firebase-firestore.js"></script>
</body>
</html>


Step 2: Create a file named called code.php and paste below code

<?php 
include('includes/dbcon.php');
session_start();

if(isset($_POST['delete_data']))
{
    $token = $_POST['ref_token_delete'];

    $ref = "contact/".$token;
    $postdata = $database->getReference($ref)->remove($data);

    if($postdata){
        $_SESSION['status'] = "Data Deleted Successfully";
        header("Location: index.php");
    }else{
        $_SESSION['status'] = "Data Not Deleted. Something Went Wrong.!";
        header("Location: index.php");
    }
}

?>


Step 3: create a file for dbconnection - dbcon.php and paste the below code:

<?php
   require __DIR__.'/vendor/autoload.php';

   use Kreait\Firebase\Factory;
   use Kreait\Firebase\ServiceAccount;

   // This assumes that you have placed the Firebase credentials in the same directory
   // as this PHP file.
   $serviceAccount = ServiceAccount::fromJsonFile(__DIR__ . '/yourjsonfile.json');
   $firebase = (new Factory)
      ->withServiceAccount($serviceAccount)
      ->withDatabaseUri('yourdatabaseproject.firebaseio.com')
      ->create();
      
   $database = $firebase->getDatabase();
?>


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