UPDATING mysql data using PHP - php

Question

I am trying to display a Website Title on my Home Page. This website title is stored in the database named mywebsite and in table settings. I want to update this with an input type text's value. The title is displayed perfectly but when I write something in the text field and submit it, the database doesn't update. I think I am doing everything right and there isn't any error displaying on my page, but still it is not working. Can anyone figure out the error?
Here's my code:
<?php
// Some database detail
$host = 'localhost';
$username = 'root';
$password = '';
$database = 'mywebsite';
// Making connection
$con = mysqli_connect($host, $username, $password, $database);
// Making a sql query for "Website Title" and saving it in variable $query
$query = "SELECT * FROM settings WHERE NameOfSetting='Website Title'";
// Applying query
$result = mysqli_query($con, $query);
// Fetching data from database
$row = mysqli_fetch_array($result);
if (isset($_POST['submit'])) {
$title = $_POST['text'];
mysqli_query($con, "UPDATE settings SET TheSetting=$title WHERE NameOfSetting='Website Title'");
}
?>
<h1><?php echo $row['TheSetting']; ?></h1>
<form method="POST">
<input type="text" placeholder="Change the title" name="text">
<input type="submit" name="submit">
</form>
EDIT: When I enter any numbers in the field and then submit and refresh it works fine but it's only working with numbers not with alphabets. I don't know why?

Answer 1

This line:
SET TheSetting=$title
$title needs to be wrapped in quotes:
SET TheSetting='$title'
Sidenote: You may also want to change this line (as a security precaution):
$title = $_POST['text'];
to:
$title = mysqli_real_escape_string($con,$_POST['text']);

Answer 2

Try with
mysqli_query($con, "UPDATE settings SET TheSetting='$title' WHERE NameOfSetting='Website Title'");

Answer 3

Well you can always do some sort of error checking. I.e. using or die(mysqli_error);
$con = mysqli_connect($host, $username, $password, $database)or die(mysqli_error);
This will atleast give you an idea of what your proplem is. Use this error checking method every time you connect, query, or close a database.

Answer 4

use this code it will solve your problem.
<?php
// Some database detail
$host = 'localhost';
$username = 'root';
$password = '';
$database = 'mywebsite';
// Making connection
$con = mysqli_connect($host, $username, $password, $database)or die(mysqli_error());
// Making a sql query for "Website Title" and saving it in variable $query
$query = "SELECT * FROM settings WHERE NameOfSetting='Website Title'";
// Applying query
$result = mysqli_query($con, $query);
// Fetching data from database
$row = mysqli_fetch_array($result);
if (isset($_POST['submit'])) {
$title = $_POST['text'];
mysqli_query($con, "UPDATE settings SET TheSetting='".$title."' WHERE NameOfSetting='Website Title'");
}
?>
<h1><?php echo $row['TheSetting']; ?></h1>
<form method="POST">
<input type="text" placeholder="Change the title" name="text">
<input type="submit" name="submit">
</form>