65 lines
2.5 KiB
PHP
65 lines
2.5 KiB
PHP
<?php
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/**
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* Class DatabaseFactory
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*
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* Use it like this:
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* $database = DatabaseFactory::getFactory()->getConnection();
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*
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* That's my personal favourite when creating a database connection.
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* It's a slightly modified version of Jon Raphaelson's excellent answer on StackOverflow:
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* http://stackoverflow.com/questions/130878/global-or-singleton-for-database-connection
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*
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* Full quote from the answer:
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*
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* "Then, in 6 months when your app is super famous and getting dugg and slashdotted and you decide you need more than
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* a single connection, all you have to do is implement some pooling in the getConnection() method. Or if you decide
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* that you want a wrapper that implements SQL logging, you can pass a PDO subclass. Or if you decide you want a new
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* connection on every invocation, you can do do that. It's flexible, instead of rigid."
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*
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* Thanks! Big up, mate!
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*/
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class DatabaseFactory
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{
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private static $factory;
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private $database;
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public static function getFactory()
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{
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if (!self::$factory) {
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self::$factory = new DatabaseFactory();
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}
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return self::$factory;
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}
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public function getConnection() {
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if (!$this->database) {
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/**
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* Check DB connection in try/catch block. Also when PDO is not constructed properly,
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* prevent to exposing database host, username and password in plain text as:
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* PDO->__construct('mysql:host=127....', 'root', '12345678', Array)
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* by throwing custom error message
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*/
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try {
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$options = array(PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_OBJ, PDO::ATTR_ERRMODE => PDO::ERRMODE_WARNING);
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$this->database = new PDO(
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Config::get('DB_TYPE') . ':host=' . Config::get('DB_HOST') . ';dbname=' .
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Config::get('DB_NAME') . ';port=' . Config::get('DB_PORT') . ';charset=' . Config::get('DB_CHARSET'),
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Config::get('DB_USER'), Config::get('DB_PASS'), $options
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);
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} catch (PDOException $e) {
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// Echo custom message. Echo error code gives you some info.
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echo 'Database connection can not be estabilished. Please try again later.' . '<br>';
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echo 'Error code: ' . $e->getCode();
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// Stop application :(
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// No connection, reached limit connections etc. so no point to keep it running
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exit;
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}
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}
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return $this->database;
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}
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}
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