Presented by:-
Mr. Ajinkya NaharMr. Ajinkya Nahar
Twitter - @ajinkyanaharTwitter - @ajinkyanahar
LinkedIn –LinkedIn –
http...
Features
PDO requires PHP Version 5.
PDO makes use of two main objects.
Once we have established a connection to the sp...
PDO Object and most useful statement
This represents a connection to the Database.
All database operations are initiated...
prepare():-
Prepares a statement returning a result set as a
PDOStatement.
We can use question marks (?) for values.
we...
The PDOStatement represents a prepared statement, as
well as a returned result set.
PDO->query operation (where it repre...
For a result set:
fetch() :-Returns the next row.
Useful arguments: PDO::FETCH_ASSOC,
PDO::FETCH_NUM,
PDO::FETCH_BOTH (de...
$database = ‘database_name';
$user = ‘user';
$password = ‘password';
$dsn = "mysql:host=localhost;dbname=$database";
try {...
Code Examples
For SELECT query -
$sql = 'SELECT * FROM users WHERE email = ? AND
password = ?';
$pds = $pdo->prepare($sql...
For INSERT query -
$sql = 'INSERT INTO users(email,password)
VALUES(?,?)';
$pds = $pdo->prepare($sql);
$pds->execute(arra...
For UPDATE query -
$sql = 'UPDATE users SET email=?, password=?
WHERE id=?';
$pds = $pdo->prepare($sql);
$pds->execute(ar...
For DELETE query -
$sql = 'DELETE FROM users WHERE id = ?';
$pds = $pdo->prepare($sql);
$pds->execute(array(
$id
));
For like query -
$sql = 'SELECT * FROM users WHERE email like ?';
$pds = $pdo->prepare($sql);
$pds->execute(array(
‘%$ema...
PHP - PDO Objects
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PHP - PDO Objects

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PHP - Mysql using PDO extention

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PHP - PDO Objects

  1. 1. Presented by:- Mr. Ajinkya NaharMr. Ajinkya Nahar Twitter - @ajinkyanaharTwitter - @ajinkyanahar LinkedIn –LinkedIn – http://in.linkedin.com/pub/ajinkya-http://in.linkedin.com/pub/ajinkya- nahar/8/404/77bnahar/8/404/77b
  2. 2. Features PDO requires PHP Version 5. PDO makes use of two main objects. Once we have established a connection to the specific database, the methods used to access and manipulate data are all generic, and do not require re-writing if you change the type of database. The PDO object itself represents a connection to the database, and provides simple methods to execute an SQL statement. The PDOStatement object represents a prepared statement, as well as a result set from an executed SQL statement.
  3. 3. PDO Object and most useful statement This represents a connection to the Database. All database operations are initiated through the PDO object. The PDO object is created when you connect to the database. After that, we can use its methods to access the database. exec():- Execute an SQL statement returning the number of rows affected. query() :- Execute an SQL statement returning a result set as a PDOStatement .
  4. 4. prepare():- Prepares a statement returning a result set as a PDOStatement. We can use question marks (?) for values. we can then call the execute(array()) method.
  5. 5. The PDOStatement represents a prepared statement, as well as a returned result set. PDO->query operation (where it represents a result set), a PDO->prepare operation (where it represents a prepared statement) or a PDO->execute operation (where it represents a result set from your prepared statement) For a prepared statement:- execute() :-Execute the prepared statement. We can use an array of values to replace the question mark parameters. Prepared Statement
  6. 6. For a result set: fetch() :-Returns the next row. Useful arguments: PDO::FETCH_ASSOC, PDO::FETCH_NUM, PDO::FETCH_BOTH (default) fetchAll():- Returns the whole result set as an array fetchColumn() :-Returns a single column of the next row.
  7. 7. $database = ‘database_name'; $user = ‘user'; $password = ‘password'; $dsn = "mysql:host=localhost;dbname=$database"; try { $pdo = new PDO ($dsn, $user, $password); } catch(PDOException $e) { die ('Oops'); // Exit, displaying an error message } Establish Connection to MySql
  8. 8. Code Examples For SELECT query - $sql = 'SELECT * FROM users WHERE email = ? AND password = ?'; $pds = $pdo->prepare($sql); $pds->execute(array( $email, $password ));
  9. 9. For INSERT query - $sql = 'INSERT INTO users(email,password) VALUES(?,?)'; $pds = $pdo->prepare($sql); $pds->execute(array( $email, $password ));
  10. 10. For UPDATE query - $sql = 'UPDATE users SET email=?, password=? WHERE id=?'; $pds = $pdo->prepare($sql); $pds->execute(array( $email, $password, $id ));
  11. 11. For DELETE query - $sql = 'DELETE FROM users WHERE id = ?'; $pds = $pdo->prepare($sql); $pds->execute(array( $id ));
  12. 12. For like query - $sql = 'SELECT * FROM users WHERE email like ?'; $pds = $pdo->prepare($sql); $pds->execute(array( ‘%$email%’ ));

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