PHP的多个复选框删除

此HTML：

echo '<div id="post1"><p >Post ID No.'.$idNoz.'<br />'.$postz.' at '.$timez.' seconds mark</p><input type="checkbox" name="checkbox[]" id="checkbox[]" value="'.$idNoz.'"</input></div>';

应该：

echo '<div id="post1"><p >Post ID No.'.$idNoz.'<br />'.$postz.' at '.$timez.' seconds mark</p><input type="checkbox" name="checkbox[]" id="checkbox[]" value="'.$idNoz.'" /></div>';

该查询

else if($_POST['btnDelete'] == "Delete")

$sql = 'DELETE FROM `'.$tbl_name.'` WHERe `PostID`='.(int)$value;