How to save checkbox value to MySQL database?

I have following html:

<label for="live">Live</label>
<input type="checkbox" name="live" id="live" />

How to save text value of selected = '1'/ or text value of unchecked = '0' to database using SQL INSERT?

Any suggestion much appreciated.

PHP handling the html form (at the moment 'live' is an input):

<?php
    //Start session
    session_start();

    //Include database connection details
    require_once('../inc/config.php');

    //Connect to mysql server
    $link = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD);
    if(!$link) {
        die('Failed to connect to server: ' . mysql_error());
    }
    if($link) {
        echo "DB SUCESS <br />";
    }

    //Select database
    $db = mysql_select_db(DB_DATABASE);
    if(!$db) {
        die("Unable to select database");
    }
    if($db){ echo "TABLE SUCCESS<br />"; }

    //Function to sanitize values received from the form. Prevents SQL injection
    function clean($str) {
        $str = @trim($str);
        if(get_magic_quotes_gpc()) {
            $str = stripslashes($str);
        }
        return mysql_real_escape_string($str);
    }

    //Sanitize the POST values
    $live = clean($_POST['live']);
    $content = clean($_POST['content']);


        //Create INSERT query
    $qry = "INSERT INTO news(live, content) VALUES('$live','$content') ";
    $result = @mysql_query($qry);

    //Check whether the query was successful or not
 开发者_如何学C   if($result) {
        //header("location: ../form/register-success.php");
        echo "Succes";      
        exit();
    }else {
        die("Query failed");
    }
?>

<input type="checkbox" name="live" value="1" />Live<br />

^Note the Value "1". If someone checks the box, it will be a 1, if they don't it will be NULL. (NOT 0!)

Do an isset on the next page, if it's set, you're good to go, if it's not, just set it to zero.

if (!isset($live)) $live = 0;

Only checked HTML checkboxes send values in the response. Use isset.