miniMVC/sys/db.php

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<?php
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/**
* MiniMVC
*
* Convention-based micro-framework for PHP
*
* @author Timothy J. Warren
* @copyright Copyright (c) 2011 - 2012
* @link https://github.com/timw4mail/miniMVC
* @license http://philsturgeon.co.uk/code/dbad-license
*/
// --------------------------------------------------------------------------
/**
* Extend PHP's PDO class to add some more functionality
*
* @extends PDO
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*/
class db extends PDO {
private $statement;
private static $instance;
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public static function get_instance($dbname="default", $options=array())
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{
if ( ! isset(self::$instance[$dbname]))
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{
//echo 'Creating new instance of db class.';
self::$instance[$dbname] = new db($dbname, $options);
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}
return self::$instance[$dbname];
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}
function __construct($dbname="default", $options=array())
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{
// Include the database config file
require(APP_PATH.'config/db.php');
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// Get the correct database in the config file
if(is_like_array($db_conf[$dbname]))
{
// Array manipulation is too verbose
extract($db_conf[$dbname]);
}
else
{
// Apparently the database doesn't exist
$this->get_last_error();
trigger_error("Database does not exist", E_USER_ERROR);
die();
}
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// Sqlite doesn't use dbname param
$dsn = (stripos($type, "sqlite") === FALSE) ? "{$type}:dbname={$db}" : "{$type}:{$db}";
// Set hostname if applicable
if(isset($host))
{
$dsn .= ($host !== "") ? ";host={$host}" : "";
}
// Set port if applicable
if(isset($port))
{
$dsn .= ($port !== "") ? ";port={$port}" : "";
}
if($user === "" && $pass === "")
{
$user = null;
$pass = null;
}
$opts = array(
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
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);
if( ! isset($persist))
{
unset($opts[PDO::ATTR_PERSISTENT]);
}
$options = $opts + $options;
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try
{
parent::__construct($dsn, $user, $pass, $options);
}
catch(Exception $e)
{
if($e->getMessage() !== "The auto-commit mode cannot be changed for this driver")
{
get_last_error();
}
}
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}
// --------------------------------------------------------------------------
/**
* PHP magic method to facilitate dynamic methods
*
* @param string $name
* @param array $args
*/
function __call($name, $args)
{
if(is_callable($this->$name))
{
//Add $this to the beginning of the args array
array_unshift($args, $this);
//Call the dynamic function
return call_user_func_array($this->$name, $args);
}
}
// --------------------------------------------------------------------------
/**
* PHP magic methods to call non-static methods statically
*
* @param string $name
* @param array $args
*/
public static function __callStatic($name, $args)
{
if(is_callable(parent::$name))
{
return call_user_func_array(parent::$name, $args);
}
}
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// --------------------------------------------------------------------------
/**
* Prints out the contents of the object when used as a string
*
* @return string
*/
function __toString()
{
$args = func_get_args();
$method = ( ! empty($args)) ? $args[0] : "print_r";
$output = '<pre>';
if($method == "var_dump")
{
ob_start();
var_dump($this);
$output .= ob_get_contents();
ob_end_clean();
}
else if($method == "var_export")
{
ob_start();
var_export($this);
$output .= ob_get_contents();
ob_end_clean();
}
else
{
$output .= print_r($this, TRUE);
}
return $output . '</pre>';
}
// --------------------------------------------------------------------------
/**
* Simplifies prepared statements for database queries
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*
* @param string $sql
* @param array $data
* @return mixed PDOStatement / FALSE
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*/
function prepare_query($sql, $data)
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{
// Prepare the sql
$query = $this->prepare($sql);
if( ! is_like_array($query))
{
$this->get_last_error();
return FALSE;
}
// Set the statement in the class variable for easy later access
$this->statement =& $query;
if( ! is_like_array($data))
{
trigger_error("Invalid data argument");
return FALSE;
}
// Bind the parameters
foreach($data as $placeholder => $value)
{
$res = $query->bindParam($placeholder, $value);
if( ! $res)
{
trigger_error("Parameter not successfully bound");
return FALSE;
}
}
return $query;
}
// --------------------------------------------------------------------------
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/**
* Returns the last error from the database
*
* @return string
*/
function get_last_error()
{
$error = array();
if(isset($this->statement))
{
$error = $this->statement->errorInfo();
}
else
{
$error = $this->errorInfo();
}
$code = $error[0];
$driver_code = $error[1];
$message = $error[2];
// Contain the content for buffering
ob_start();
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include(APP_PATH.'/errors/error_db.php');
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$buffer = ob_get_contents();
ob_end_clean();
echo $buffer;
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}
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}
// End of db.php