输入文本值时，数据库无法创建记录（$ _POST）

Question

Perhaps I'm making some obvious beginner mistake, but I just cannot seem to figure out why this happens.

Strangely enough, the code only seems to work properly if I enter a number into the "inputbox". I check this in the myphpadmin panel, and it shows a new record has been created. However, if I attempt to input a string as intended for my purposes (example: "hello") no new record appears in the database...

In short, the database only updates if I put a number into the "inputbox" but not when I enter a string.

Any ideas why this may be happening? It's driving me crazy. If it helps, the data type of the "Company" field is VARCHAR and the collation is set to latin1_swedish_ci

The PHP code is as follows:

<?php


//Retrieve data from 'inputbox' textbox

if (isset($_POST['submitbutton']))
    {
    $comprating = $_POST['inputbox'];

    //Create connection

        $con = mysqli_connect("localhost","root","","test_db");

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

    //Insert data into 'Ratings' table

    mysqli_query($con,"INSERT INTO Ratings (Company,Score)
    VALUES ($comprating,1)");

    mysqli_close($con);



    }


?>

The HTML code is:

<form method="post">

    <input type="text" name="inputbox">
    <input type="submit" name="submitbutton">

</form>

Cheers

Answer 1

Try this query,

mysqli_query($con,"INSERT INTO Ratings (Company,Score)
VALUES ('$comprating',1)");`
        ^           ^

Note the single quotes that reserves the string value and don't forget to sanitize the input before inserting them to database.

Sample standard escaping:

$comprating = mysqli_real_escape_string($comprating) before executing a query that uses $comprating