I have switched over to PDO using the link provided and wrote the following code only to get an error referring to the same variable containing the insert.
Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING or T_VARIABLE or T_NUM_STRING
This error is referring to the line after the $stmt INSERT.
   <?php
   $servername = "XXXXXXXXXX";
   $username = "ymodb";
   $password = "XXXXXXXXX";
   $dbname = "ymodb";
   try {
   $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
   // set the PDO error mode to exception
   $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
   // prepare sql and bind parameters
   $stmt = $conn->prepare("INSERT INTO users (fullname, email, password, fname, email1, password1, relationship) VALUES ('$_POST['fullname']','$_POST['email']','$_POST['password']','$_POST['fname']','$_POST['email1']','$_POST['password1']','$_POST['relationship']')");
$stmt->execute();
echo "New records created successfully";
}
catch(PDOException $e)
{
echo "Error: " . $e->getMessage();
}
$conn = null;
?>
