Saludos .
Espero que les sirva.
Código PHP:
Ver original<form name="Formulario" action="<?=$_SERVER['PHP_SELF']?>" method="post">
<?php for ( $a=0;$a<10;$a++ ):$word = "Check_".$a;?>
<div><?=$word?><input type="checkbox" name="check[<?=$a?>]" id="check_<?=$a?>"></div>
<?php endfor; ?>
<input type="hidden" name="Num" value="<?=$a?>"
<input type="submit" name="Btn" value="Enviar">
</form>
<?php
if(isset($_POST['Btn'])){ for($a=0;$a<$_POST['Num'];$a++){
if( !empty($_POST['check'][$a])){ echo $a."<br>";
}
}
}
?>