initial commit of laravel!

system/db.php

@@ -0,0 +1,111 @@
+<?php namespace System;
+
+class DB {
+
+	/**
+	 * The active database connections.
+	 *
+	 * @var array
+	 */
+	private static $connections = array();
+
+	/**
+	 * Get a database connection.
+	 *
+	 * @param  string  $connection
+	 * @return PDO
+	 */
+	public static function connection($connection = null)
+	{
+		// ---------------------------------------------------
+		// If no connection was given, use the default.
+		// ---------------------------------------------------
+		if (is_null($connection))
+		{
+			$connection = Config::get('db.default');
+		}
+
+		// ---------------------------------------------------
+		// If we have already established this connection,
+		// simply return the existing connection.
+		// ---------------------------------------------------
+		if ( ! array_key_exists($connection, static::$connections))
+		{
+			// ---------------------------------------------------
+			// Get the database configurations.
+			// ---------------------------------------------------
+			$config = Config::get('db.connections');
+
+			// ---------------------------------------------------
+			// Verify the connection has been defined.
+			// ---------------------------------------------------
+			if ( ! array_key_exists($connection, $config))
+			{
+				throw new \Exception("Database connection [$connection] is not defined.");
+			}
+
+			// ---------------------------------------------------
+			// Establish the database connection.
+			// ---------------------------------------------------
+			static::$connections[$connection] = DB\Connector::connect((object) $config[$connection]);
+		}
+
+		return static::$connections[$connection];
+	}
+
+	/**
+	 * Execute a SQL query against the connection.
+	 *
+	 * @param  string  $sql
+	 * @param  array   $bindings
+	 * @param  string  $connection
+	 * @return mixed
+	 */
+	public static function query($sql, $bindings = array(), $connection = null)
+	{
+		// ---------------------------------------------------
+		// Create a new PDO statement from the SQL.
+		// ---------------------------------------------------
+		$query = static::connection($connection)->prepare($sql);
+
+		// ---------------------------------------------------
+		// Execute the query with the bindings.
+		// ---------------------------------------------------
+		$result = $query->execute($bindings);
+
+		// ---------------------------------------------------
+		// For SELECT statements, return the results in an
+		// array of stdClasses.
+		//
+		// For UPDATE and DELETE statements, return the number
+		// or rows affected by the query.
+		//
+		// For INSERT statements, return a boolean.
+		// ---------------------------------------------------
+		if (strpos(Str::upper($sql), 'SELECT') === 0)
+		{
+			return $query->fetchAll(\PDO::FETCH_CLASS, 'stdClass');
+		}
+		elseif (strpos(Str::upper($sql), 'UPDATE') === 0 or strpos(Str::upper($sql), 'DELETE') === 0)
+		{
+			return $query->rowCount();
+		}
+		else
+		{
+			return $result;
+		}
+	}
+
+	/**
+	 * Begin a fluent query against a table.
+	 *
+	 * @param  string  $table
+	 * @param  string  $connection
+	 * @return Query
+	 */
+	public static function table($table, $connection = null)
+	{
+		return new DB\Query($table, $connection);
+	}
+
+}