PHP/MySQL
From dbawiki
Using prepared statements to avoid SQL injection
Using this method of writing SQL removes the necessity to attempt to clean the input with mysql_real_escape_string()
$dbPreparedStatement = $db->prepare('INSERT INTO table (postId, htmlcontent) VALUES (:postid, :htmlcontent)');
$dbPreparedStatement->bindParam(':postid', $userId, PDO::PARAM_INT);
$dbPreparedStatement->bindParam(':htmlcontent', $yourHtmlData, PDO::PARAM_STR);
$dbPreparedStatement->execute();
