The History of PHPersistence

The History of PHPersistence Hugo Hamon - @hhamon OSIDays November 2011

PHP/FIWhere Everything Begins…

1995PHP/FI

1995Files handling

$fp = fopen("/counter.txt","w+"); $counter = fgets($fp,1024); $counter++; fputs($fp, $counter); fclose($fp);

1995Databases support

$db = mysql_connect("localhost", "root", "secret");$name = "bob";$result = mysql( $db, "select * from table where firstname=$name");$num = mysql_numrows($result);echo "$num records found!<p>";

$i=0;while ($i<$num); echo mysql_result($result,$i,"lcase(fullname)"); echo "n"; echo mysql_result($result,$i,"address"); echo "n"; $i++;endwhile;

PHP 3/4Code Reusability

User Functions

function db_connect($database, $host, $user, $pwd);function db_fetch_single($dbh, $query);function db_fetch_all($dbh, $query);function db_insert($dbh, $table, $values);function db_update($dbh, $table, $values, $pk);function db_delete($dbh, $table, $pk);function db_list_fields($dbh, $table);function db_drop_table($dbh, $table);

/** * Fetches a single record from a database * * @param resource $dbh The database handler * @param string $query A SQL query * @return array A single record as an array */function db_fetch_single($dbh, $query){ return current(db_fetch_all($dbh, $query));}

include lib/database.inc.php;$dbh = db_connect(osidays);$query = SELECT id, name FROM author;$authors = db_fetch_all($dbh, $query);$author = db_fetch_single( $dbh, SELECT id, name FROM author WHERE id = 3);$id = db_insert($dbh, author, array( name => Jules Verne));

PHP 4OOP & Reusability

class Database{ function Database($database, host, $user, $pwd); function disconnect(); function connect(); function free(); function getErrorMessage(); function getErrorCode(); function getLastInsertId(); function insert($table, array $values); function fetchAll($query); function fetchSingle($query); function query($query); function quote($string); function hasError(); function _collectError(); function _init();}

require lib/Database.php;$db= &new Database(demo, localhost, root);$q = SELECT id, name FROM author;foreach ($db->fetchAll($q) as $author) { // ...}$db->free();$db->disconnect();

require lib/Database.php;$db= &new Database(demo, localhost, root);$q = SELECT id, name FROM author WHERE id = 1;$author = $db->fetchSingle($q);$db->free();$db->disconnect();

require lib/Database.php;$db= &new Database(demo, localhost, root);$res = $db->insert(author, array( name => Jules Vernes));if ($result) { $id = $db->getLastInsertId();}$db->disconnect();

PHP 4Professional APIs

• PEAR::DB • MDB• ADOdb • MDB2• Metabase • Creole

§  Multiple databases support§  Uni ed APIs§  Prepared statements supports§  Query caching§  Security against SQL Injections

PEAR MDB2

$dsn = array( phptype => mysql, username => root, password => , hostspec => localhost, database => demo,);$db = & MDB2::connect($dsn);$db->setFetchMode(MDB2_FETCHMODE_ASSOC);$rs = $db->queryAll(SELECT id, name FROM author);$db->disconnect();

include(adodb.inc.php);$db = NewADOConnection(mysql);$db->Connect(localhost, root, password, demo);$result = $db->Execute(SELECT id, name FROM author);if ($result) { while (!$result->EOF) { echo ID: , $result->fields[0] ,"n"; echo Name:, $result->fields[1] ,"n"; $result->MoveNext(); }}

2004PHP 5

2005PHP Data Object

•  PECL extension as of PHP 5.0.0•  Core extension since PHP 5.1.0 (11/2005)•  12 oﬃcial drivers as of today•  Extensible Object Oriented API•  Prepared statements & transaction support•  Stored procedures support

« PDO provides a data-access abstractionlayer, which means that, regardless ofwhich database youre using, you use thesame functions to issue queries and fetchdata. »

« PDO does not provide adatabase abstraction as itdoesnt rewrite SQL or emulatemissing features »

Transactions /Prepared Statements

try { $pdo->beginTransaction(); $query = INSERT INTO author (name) VALUES (?); $stmt = $pdo->prepare($query); $stmt->bindValue(1, Jules Verne); $stmt->execute(); $id = $pdo->lastInsertId(); $pdo->commit();} catch (PDOException $e) { $pdo->rollback();}

Stored Procedures

DELIMITER |CREATE PROCEDURE coming_events (IN start DATE, OUT events INT)BEGIN SELECT COUNT(*) INTO events FROM events WHERE start_at >=start;END|$query = "CALL coming_events(2011-03-01, @events);";$pdo->query($query);$stmt = $pdo->query("SELECT @events;");echo $stmt->fetchColumn() , events to come.;

PHP 5Zend_Db

Table Data Gateway

class AuthorGateway extends Zend_Db_Table_Abstract{ protected $_name = authors; protected $_primary = author_id;}

$data = array( first_name => Jules, last_name => Vernes,);$table = new AuthorGateway();$table->insert($data);

Row Data Gateway

$table = new AuthorGateway();// New empty row$row = $table->createRow();// Insert a new row$row->firstName = Jules;$row->lastName = Verne;$row->save();

Active Query

$isbn = 1234567890;$rows = $db->select() ->from(array(b => books)) ->where(b.isbn = ?, $isbn) ->order(array(b.title ASC)) ->query() ->fetchAll();

PHP 5Object Relational Mapping

•  Use objects instead of raw SQL queries•  Database abstraction layer (not always)•  Relationships support•  Behaviors support (i18n, timestampable…)•  Querying API•  Error logging

2005Propel ORM

$author = new Author();$author->setFirstName("Leo");$author->setLastName("Tolstoy");$book = new Book();$book->setTitle("War & Peace");$book->setIsbn("0140444173");$book->setAuthor($author);$book->save();

$query = BookQuery::create() ->joinWith(Book.Author) ->joinWith(Book.Publisher) ->where(Author.firstName = ?, Leo) ->where(Author.lastName = ?, Tolstoï) ->orderByTitle() ->filterByPublishYear(2009) ->find();

2009Doctrine 1.x

$books = Doctrine_Query::create() ->select(b.*, a.*, p.*) ->from(Book b) ->leftJoin(b.Author a) ->leftJoin(b.Publisher p) ->where(a.firstName = ?, Karl) ->andWhere(a.lastName = ?, Marx) ->orderBy(b.title ASC) ->execute();

2009 PHP 5.3

ORM Frameworks

Doctrine2

•  Database Abstraction Layer•  Object Relational Mapping•  Schema management•  Migrations support•  XML & NoSQL databases support

/** @Entity() */class Author{ /** * @Id() * @GeneratedValue() * @Column(type="integer") */ private $id; /** @Column(type="string", length="30") */ private $name; /** @ReferenceMany(targetDocument="BlogPost") */ private $posts = array();}

$post = new BlogPost();$post->setTitle(My First Blog Post);$post->setBody(Some content...);$author = new Author();$author->setName(Hugo Hamon);$author->addPost($post);$em->persist($user);$em->persist($post);$dm->flush();

Toward NoSQL…

« Not Only SQL »

Key abcdef Hugo Hamon Value

FirstName: Hugo Column 1Key abcdef LastName: Hamon Column 2 Role: Speaker Column 3

DocumentKey abcdef Name: Hugo Hamon 0: PHP Skills 1: HTML 2: CSS Role: Speaker

2009MongoDB Driver

•  Cross-platform support•  Schemaless language•  BSON type support•  Binary le storage support (GridFS)•  Master – slave replication support•  Sharding (horizontal scaling)

$mongo = new Mongo();$col = $mongo->selectDb(osidays)->books;$books = array( array(title => Da Vinci Code), array(title => The Lost Symbol), array(title => Digital Fortress),);foreach ($books as $book) { $collection->insert($book);}

What’s next…… for today and tomorrow?

2011PHP 5.3 ODM Frameworks

•  ORM Layers for Mongodb•  Dealing with objects instead of arrays•  Relationships support•  Query abstraction•  GridFS support•  Query logging & caching

$post = new BlogPost();$post->setTitle(My First Blog Post);$post->setBody(Some content...);$author = new Author();$author->setName(Hugo Hamon);$author->setEmail(hugo@example.com);$dm->persist($user);$user->addPost($post);$dm->flush();

QuesAons? 92-98, boulevard Victor Hugo 92 115 Clichy Cedex trainings@sensio.com (+33 (0)1 40 99 82 11) sensiolabs.com - symfony.com – trainings.sensiolabs.com

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The History of PHPersistence

by Hugo Hamon on Nov 20, 2011

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