L'utilisation de PDO dans les classes

Ici est surtout un travail complet cut & pâte exemple de Guillaume Boschini's réponse ci-dessus.

Un peuplé de la table DB (MySQL):

CREATE TABLE `useraddress` (                                                                                                                                        
  `addressid` int(10) unsigned NOT NULL AUTO_INCREMENT,                                                                                                                             
  `userid` int(10) unsigned NOT NULL,                                                                                                                                               
  `addresstitle` char(100) NOT NULL,                                                                                                                        
  `streetaddressa` char(100) NOT NULL,
  `streetaddressb` char(100) DEFAULT NULL,
  `unit` char(50) DEFAULT NULL,
  `city` char(50) NOT NULL,
  `state` char(2) NOT NULL,
  `zip` int(5) NOT NULL,
  `zipplusfour` int(4) DEFAULT NULL,
  PRIMARY KEY (`addressid`),
  KEY `userid` (`userid`),
  CONSTRAINT `useraddress_fk_1` FOREIGN KEY (`userid`) REFERENCES `user` (`userid`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

Dans /DBLibrary/pdocore.php:

<?php
Config::write('db.host', 'localhost');
Config::write('db.port', '3306');
Config::write('db.basename', 'DBName');
Config::write('db.user', 'DBUser');
Config::write('db.password', 'DBPassword');
class Config {
static $confArray;
public static function read($name) {
return self::$confArray[$name];
}
public static function write($name, $value) {
self::$confArray[$name] = $value;
}
}
class Core {
public $dbh; //handle of the db connection
private static $instance;
private function __construct()  {
//building data source name from config
$dsn = 'mysql:host=' . Config::read('db.host') . ';dbname=' . Config::read('db.basename') . ';port=' . Config::read('db.port') .';connect_timeout=15';
//getting DB user from config
$user = Config::read('db.user');
//getting DB password from config
$password = Config::read('db.password');
$this->dbh = new PDO($dsn, $user, $password);
$this->dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
public static function getInstance() {
if (!isset(self::$instance)) {
$object = __CLASS__;
self::$instance = new $object;
}
return self::$instance;
}
//others global functions
}
?>

Dans /objectsLibrary/SYS_UserAddress.php:

<?php
define('k_uaddress_addressid','addressid');
define('k_uaddress_userid','userid');
define('k_uaddress_addresstitle','addresstitle');
define('k_uaddress_addressa','streetaddressa');
define('k_uaddress_addressb','streetaddressb');
define('k_uaddress_unit','unit');
define('k_uaddress_city','city');
define('k_uaddress_state','state');
define('k_uaddress_zip','zip');
define('k_uaddress_zipplusfour','zipplusfour');
require_once '../DBLibrary/pdocore.php';
class SYS_UserAddress {
public $addressid;
public $userid;
public $addresstitle;
public $addressa;
public $addressb;
public $unit;
public $city;
public $state;
public $zip;
public $zipplusfour;
public function SYS_UserAddressByAddressId($_addressid) {
$returnValue=FALSE;
$query='select * from useraddress where ' . k_uaddress_addressid . '=:addressid';
try {
$pdoCore = Core::getInstance();
$pdoObject = $pdoCore->dbh->prepare($query);
$queryArray = array(':addressid'=>$_addressid);
if ($pdoObject->execute($queryArray)) {
$pdoObject->setFetchMode(PDO::FETCH_ASSOC);;
while ($addressrow = $pdoObject->fetch()) {
$this->addressid=$addressrow[k_uaddress_addressid];
$this->userid=$addressrow[k_uaddress_userid];
$this->addresstitle=$addressrow[k_uaddress_addresstitle];
$this->addressa=$addressrow[k_uaddress_addressa];
$this->addressb=$addressrow[k_uaddress_addressb];
$this->unit=$addressrow[k_uaddress_unit];
$this->city=$addressrow[k_uaddress_city];
$this->zip=$addressrow[k_uaddress_zip];
$this->zipplusfour=$addressrow[k_uaddress_zipplusfour];
}
$returnValue=TRUE;
}
}
catch(PDOException $pe) {
trigger_error('Could not connect to MySQL database. ' . $pe->getMessage() , E_USER_ERROR);
}
return $returnValue;
}
}
$test=1;
$testAddressId=2;
if($test>0) {
$testAddress = new SYS_UserAddress();
$testAddress->SYS_UserAddressByAddressId($testAddressId);
echo '<pre>';
echo print_r($testAddress);
echo '</pre>';
}
?>

Le post ci-dessus m'a vraiment aidé. Ce post, je vais faire maintenant, aurait réussi à me faire à l'endroit où je voulais être plus rapide. C'est tout. Si quelque chose ne va pas, je serai là pour le résoudre.

j'ai trouvé une meilleure solution :
lorsque vous avez un AOP de connexion à l'extérieur de votre classe et ne peux utiliser que la connexion à l'intérieur de la classe , envoyer l'objet PDO pour le constructeur en tant que paramètre

///c'est mon aop connexion

$pdo_object = new PDO('mysql:host=localhost;dbname=blabla','user','pw');

///im la création de l'instance de cette classe comme un obj

$dataObj=new class_name($pdo_obj);

/////l'intérieur de la classe :::simplifié

class class_name{
private $handler;////this is what i use for PDO connection inside the class
public function __construct($connection_name){
if(!empty($connection_name)){
$this->handler=$connection_name;
///its a great thing that holy php doesnt care much about variant types. any variant is able to carry any object (like PDO obj)
}else{
throw new Exception("cant connect bla bla...");
}
}/////contruct fx
////how i use that pdo connection which is implamented to a local var called handler  with any sql query is : 
$dataSet= $this->handler->query("SELECT * FROM users WHERE ....");
}////endof class