勿体ないので掲載。
$id = (int) $_GET['id']; define('DB_HOST', 'localhost'); define('DB_USER', 'username'); define('DB_PASS', 'password'); define('DB_NAME', 'dbname'); $column = 'data'; $table = 'table'; $dbh = mysql_connect(DB_HOST, DB_USER, DB_PASS); mysql_select_db(DB_NAME, $dbh); $result = mysql_query("SELECT `{$column}` FROM `{$table}` WHERE `id` = '{$id}'", $dbh); $row = mysql_fetch_array($result); header("Content-type: image/jpeg"); print($row[0]);
以上。