adding data with PHP to the db is not working - php

Question

I'm using MAMP an my PHP won't add data to the db
I have looked at other similar questions and done everything on them, yet it still is not working.
I am using MAMP and I've done everything right as far as I know but the problem is the same no matter what I do.
<?php
require_once('dbconnect.php');
$email = $_GET['email'];
$name = $_GET['name'];
$message = $_GET['message'];
$my_query = "";
$my_query = "select * from Users where email = '$email' ";
$my_query = "INSERT INTO Users (email, name, message) VALUES ('$email', '$name', '$message')";
$result = mysqli_query($connection, $my_query );
if($result)
{
echo "Successfully Sent!";
}
else
{
echo "<b>ERROR: unable to post </b>";
}
}
mysqli_close();
?>

Answer 1

Here use this code and and tell what is the error
<?php
$con=mysqli_connect("localhost","my_user","my_password","my_db");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
// Perform a query, check for error
if (!mysqli_query($con,"INSERT INTO Users (email, name, message) VALUES ('$email', '$name', '$message')"))
{
echo("Error description: " . mysqli_error($con));
}
mysqli_close($con);
?>
if you dont get any error or blank value in db use your values like
values('".$email."', '".$name."', '".$message."')"
in db It will be executed like values('test.abc.com', 'abc', 'It is working')