Trying to create a simple cumulative addition script in PHP (or JS):

html
<form method="post" action= "process-mantra-form-ami.php" >
    <p><strong>Amitabha Million Mantra Accumulation: </strong><br></p>
    <div style="margin-left: 20px;">
        <p>OM AMI DEWA HRI</p>
        <input type="text" name="accumulation" size="10" maxlength="6">
        <input type="submit" value="Submit Your Mantra" name="B1"><br>
        <span id="mani">Amitabha Mantra Count: <?php echo $newValue; ?> </span>
        <p></p>
    </div>
</form>

php
// Create connection
$con=mysqli_connect("localhost:8888","root","root","my_db");

// Check connection
if (mysqli_connect_errno()) {
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

// escape variables for security
$accumulation = mysqli_real_escape_string($con, $_POST['accumulation']);

// Create database
$sql="CREATE DATABASE my_db";
if (mysqli_query($con,$sql)) {
  echo "Database my_db created successfully";
} else {
  echo "Error creating database: " . mysqli_error($con);
}

// Create table "Mantras" with one column 'Num'
$sql="CREATE TABLE Mantras (Num INT)";
if (mysqli_query($con,$sql)) {
  echo "Table mantras created successfully";
} else {
  echo "Error creating table: " . mysqli_error($con);
}

// Insert form data into table
$sql="INSERT INTO Mantras (Num INT)
VALUES ('$num')";

if (!mysqli_query($con,$sql)) {
  die('Error: ' . mysqli_error($con));
}

// update database
mysqli_query($con,"UPDATE Mantra SET Num = num + 1");

}

mysqli_close($con);