<?php
$servername = "localhost";
$username = "root";//to change that to our username
$password = "";
$dbname = "twitter";

$tweet = $_POST["tweet"]; // getting tweet from jquery script

$tweet = stripslashes($tweet);//stops there being any unwanted characters that the client didnt out in
$tweet = mysql_real_escape_string($tweet);

$dataArray = array();
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$sql = "INSERT INTO twitter (tweet)
VALUES ('$tweet')"; // inserting the text into the variable twitter/tweet

if ($conn->query($sql) === TRUE) {
    array_push($dataArray,"A new tweet has been posted");
} else {
    array_push($dataArray,"No message has been posted");
}

$conn->close();//closing the connection

echo json_encode($dataArray);//send the data back to browser for jquery to pick it up
?>
<!--$ means variable-->