PDO::query() executes an SQL statement in a single function call, returning the result set (if any) returned by the statement as a PDOStatement object. \PDO::FETCH_ASSOC will return only field => value array, whilst \PDO::FETCH_NUM return array with numerical keys only and \PDO::FETCH_BOTH will return result like in the answer. However, keep in mind that MySQL is by far the most popular database. PDO::query() - Executes an SQL statement, returning a result set as a PDOStatement object; PDOStatement::fetch() - Fetches the next row from a result set; PDOStatement::fetchAll() - Returns an array containing all of the result set rows; PDO::prepare() - Prepares a statement for execution and returns a statement object SQL Attack is rampant now a days, this is the way of hacking a site using SQL injection. Programming with Mosh Recommended for you PHP MySQL Querying data using PDO prepared statement.

In practice, we often pass the argument from PHP to the SQL statement e.g., get the employee whose last name ends with son.To do it securely and avoid SQL injection attack, you need to use the PDO prepared statement. etc. PDO (PHP Data Objects) is an abstraction layer for your database queries and is an awesome alternative to MySQLi, as it supports 12 different database drivers.



im doing a short tutorial on php pdo and the content isnt that detailed so i have some questions. Reading this tutorial will teach you on how to protect your queries from SQL injection attack using PDO Query. Is there any performance difference between using PDO::fetchAll() and PDO::fetch() in a loop (for large result sets)?
; Use the query() method of the PDO object to execute the SELECT statement.

Like it is said in the [main article](/pdo), PDO fetch modes (along with usable prepared statements) is a thing that makes PDO a wrapper, not yet another (though universal) database API.
PHP Data Objects (PDO) Query executes an SQL statement in a single function call, returning the result set (if any) returned by the statement as a PDOStatement object.

with the query and fetch functions. fetch_style. These modes could dramatically reduce the amount of code for routine operations, as they let you to get the data in the proper format right out of the query. Here I used the parameter PDO::FETCH_OBJ that returns the fetched data as an object. To return data as an associative array pass the PDO::FETCHASSOC constant. couldnt a user do sql injection? It accepts the fetch style as the first parameter.

coleio. To return data as a numeric indexed array pass the PDO::FETCHNUM constant. Cette valeur doit être une des constantes PDO::FETCH_*, et par défaut, vaut la valeur de PDO::ATTR_DEFAULT_FETCH_MODE (qui vaut par défaut la valeur de la constante PDO::FETCH_BOTH).. PDO::FETCH_ASSOC: retourne un tableau indexé par le nom de la colonne comme retourné dans le jeu … I was recently populating some dropdown menu's with results from a database, so the query looked like this If the cursor is at the end of the result set (the last row has been retrieved and the cursor has advanced past the result set boundary) and if the cursor is forward-only (PDO::ATTR_CURSOR = PDO::CURSOR_FWDONLY), subsequent fetch calls will fail. For a query that you need to issue multiple times, you will realize better performance if you prepare a PDOStatement object using PDO::prepare() and issue the statement with multiple calls to PDOStatement::execute(). This constant should be passed to ->fetchAll() method in this case. I’m fetching into objects of a user-defined class, if that makes any difference. For a PDOStatement object representing a scrollable cursor for which the cursor_orientation parameter is set to PDO::FETCH_ORI_REL, this value specifies the row to fetch relative to the cursor position before PDOStatement::fetch() was called. I will show examples for the every case so you can choose one that suits you best. Liste de paramètres.