Mettre un toogle sur "on" ou "off" en fonction d'une variabl

<?php
session_start();
$DATABASE_HOST = 'HOTE';
$DATABASE_USER = 'NOMUTILISATEUR';
$DATABASE_PASS = 'MDPBDD';
$DATABASE_NAME = 'NOMBDD';

$con = mysqli_connect($DATABASE_HOST, $DATABASE_USER, $DATABASE_PASS, $DATABASE_NAME);

$automaj = !empty($_POST['automaj']);
if (empty($_POST['automaj'])){
    $automaj=0;
} elseif (!empty($_POST['automaj'])){
    $automaj=1;
}


if ( mysqli_connect_errno() ) {
	die (header('Location: maj.php?error=1'));
}
$username = $_SESSION['name'];

   $modification='UPDATE accounts SET automaj='.$automaj.' WHERE username = ?';

if ($stmt = $con->prepare($modification)) {
	$stmt->bind_param('s', $username);
	$stmt->execute();
header('Location: maj.php?success=1');
	} else {
header('Location: maj.php?error=1');
	
$stmt->close();
}
?>

    <form action="setmaj.php" method="post">
<div class="switchToggle">
    <input type="checkbox" value="1" name="automaj" id="automaj" <?php $c="0"; if ($automaj>$c) echo ' checked="checked" ';?>>
    <label for="automaj">Toggle</label>
</div>
<button type="submit" class="btn btn-dark">Valider</button>
</form>

Si jamais quelqu'un veut toute la page HTML, qu'il n'hésite pas à me contacter par MP...

Encore un tout grand merci !

<?php if ($taVariable) echo ' checked="checked" ';?>

    <form action="setmaj.php?automaj=<?php $un="1"; $zero="0"; if (automaj=="checked") echo '1'; if (automaj=="checked") echo '0';?>" method="post">
<div class="switchToggle">
    <input type="checkbox" id="switch" name="automaj" id="automaj" <?php $c="0"; if ($automaj>$c) echo ' checked="checked" ';?>>
    <label for="switch">Toggle</label>
</div>
<button type="submit" class="btn btn-dark">Valider</button>
</form>