Failing to send checkbox value to MySQL database? - php

Question

I'm trying to store a Boolean value in my database based off a checkbox(Watched) in a form. If the checkbox isn't checked on form submit, it should send a 0; Otherwise a 1.
However, it sends a value of 0 no matter if it's checked or not. The Title Field and Genre field send perfectly, however the Watched conditional is not working correctly. I'm stumped and having a hard time wrapping my head around this, any thoughts?
<?php
require 'config/config.php';
require 'config/db.php';
// Check for Submit
if(isset($_POST['submit'])) {
// Get Form Data
$title = mysqli_real_escape_string($conn, $_POST['title']);
$genre = mysqli_real_escape_string($conn, $_POST['genre']);
if (isset($_POST['watched']) && ($_POST['watched'] == "value")) {
$watched = 1;
} else {
$watched = 0;
}
$query = "INSERT INTO movies(name, genre, watched) VALUES('$title', '$genre', '$watched')";
if (mysqli_query($conn, $query)) {
header('Location: '.ROOT_URL.'');
} else {
echo "ERROR: " . mysqli_error($conn);
}
}
?>
<form method="POST" action="<?php $_SERVER['PHP_SELF']; ?>">
<div class="md-form">
<input type="text" id="form1" class="form-control" name="title">
<label for="form1" class="">Title</label>
</div>
<div class="md-form">
<input type="text" id="form1" class="form-control" name="genre">
<label for="form1" class="">Genre</label>
</div>
<div class="form-group">
<input type="checkbox" id="checkbox1" name="watched">
<label for="checkbox1">Have you watched it already?</label>
</div>
<input type="submit" name="submit" value="submit" class="btn btn-primary">
</form>

Answer 1

You never set an actual value for the checkbox in your form HTML, so the value of the checkbox will never exist which means your if statement will always return false.
Simply change this:
<input type="checkbox" id="checkbox1" name="watched">
to this:
<input type="checkbox" id="checkbox1" name="watched" value="value">