b2Core: 300 lines of php MVC architecture

b2Core is a lightweight php MVC framework, with 300 lines of code encapsulating common CRUD and other practical functions.
Please see the latest version of the code http://b2core.b24.cn, welcome criticism and suggestions.

This page has detailed comments on each part of the code.
The format of the front-end request is

http://domain/index.php/controller/method/param1/param2/
or
http://domain/controller/method/param1/param2/

/**
 * B2Core is an MVC architecture based on PHP initiated by Brant (brantx@gmail.com)
 * The core idea is to retain the flexibility of PHP to the maximum extent based on the MVC framework
 * Vison 2.0 (20120515)
 **/

define('VERSION','2.0');

// Load configuration files: database, url routing, etc.
require(APP. 'config.php');

//If the database is configured, load it
if(isset($db_config)) $db = new db($db_config);

// Get the requested address compatible with SAE
$uri = '';
if(isset($_SERVER['PATH_INFO'])) $uri = $_SERVER['PATH_INFO'];
if(isset($_SERVER['ORIG_PATH_INFO'])) $uri = $_SERVER[' ORIG_PATH_INFO'];
if(isset($_SERVER['SCRIPT_URL'])) $uri = $_SERVER['SCRIPT_URL'];

// Remove Magic_Quotes
if(get_magic_quotes_gpc()) // Maybe would be removed in php6
{
 function stripslashes_deep($value)
 {
 $value = is_array($value) ? array_map('stripslashes_deep', $value) : (isset($value) ? stripslashes($value) : null);
 return $ value;
 }
 $_POST = stripslashes_deep($_POST);
 $_GET = stripslashes_deep($_GET);
 $_COOKIE = stripslashes_deep($_COOKIE);
}

// Execute the url routing configured in config.php
 foreach ($route_config as $key => $val)
{
 $key = str_replace(':any', '([^/.]+)', str_replace(':num', '([0-9 ]+)', $key));
 if (preg_match('#^'.$key.'#', $uri))$uri = preg_replace('#^'.$key.'#', $val , $uri);
}

// Get the parameters of each segment in the URL
$uri = rtrim($uri,'/');
$seg = explode('/',$uri);
$des_dir = $dir = '';

/* Load the architecture file __construct.php of all directories above the controller in sequence
* The architecture file can contain the parent classes of all controllers in the current directory, and the functions that need to be called
*/

foreach($seg as $cur_dir)
{
 $des_dir.=$cur_dir."/";
 if(is_file(APP.'c'.$des_dir.'__construct.php')) {
 require(APP .'c'.$des_dir.'__construct.php');
 $dir .=array_shift($seg).'/';
 }
 else {
 break;
 }
}

/* Call control based on url If the method in the container does not exist, a 404 error will be returned
* Default request class home->index()
*/

$dir = $dir ? $dir:'/';
array_unshift($seg,NULL);
$class = isset($seg[1])?$seg[1]:'home';
$method = isset($seg[2])?$seg[2]:'index';
if(! is_file(APP.'c'.$dir.$class.'.php'))show_404();
require(APP.'c'.$dir.$class.'.php');
if(!class_exists ($class))show_404();
if(!method_exists($class,$method))show_404();
$B2 = new $class();
call_user_func_array(array(&$B2, $method), array_slice ($seg, 3));

/* B2 system function
* load($path,$instantiate) can dynamically load objects, such as controllers, models, library classes, etc.
* $path is the relative app of class files The address
* When $instantiate is False, only the file is referenced and the object is not instantiated
* When $instantiate is an array, the array content will be passed to the object as a parameter
*/
function &load($path, $instantiate = TRUE )
 {
 $param = FALSE;
 if(is_array($instantiate)) {
 $param = $instantiate;
 $instantiate = TRUE;
 }
 $file = explode('/',$path);
 $class_name = array_pop($file);
 $object_name = md5($path);

 static $objects = array();
 if (isset($objects[$object_name])) return $objects[$object_name];
 require( APP.$path.'.php');
 if ($instantiate == FALSE) $objects[$object_name] = TRUE;
 if($param)$objects[$object_name] = new $class_name($param);
 else $objects[$object_name] = new $class_name();
 return $objects[$object_name];
}

/* Call view file
* function view($view,$param = array(),$cache = FALSE)
* $view is the address of the template file relative to the app/v/ directory. The address should remove the .php file suffix
* The variables in the $param array will be passed to the template file
* When $cache = TRUE, it is not like browsing instead of returning the result in the form of string
*/
function view($view,$param = array(),$cache = FALSE)
{
 if(!empty($param))extract($param) ;
 ob_start();
 if(is_file(APP.$view.'.php')) {
 require APP.$view.'.php';
 }
 else {
 echo 'view '.$view.' desn't exsit';
 return false;
 }
 // Return the file data if requested
 if ($cache === TRUE)
 {
 $buffer = ob_get_contents();
 @ob_end_clean();
 return $ buffer;
 }
}

// Get the fragment of url, for example, the url is /abc/def/g/ seg(1) = abc
function seg($i)
{
 global $seg;
 return isset($ seg[$i])?$seg[$i]:false;
}

// Write log
function write_log($level = 0 ,$content = 'none')
{
 file_put_contents(APP.'log /'.$level.'-'.date('Y-m-d').'.log', $content , FILE_APPEND );
}

//Display 404 error
function show_404() //Display 404 error
 {
 header("HTTP/1.1 404 Not Found");
 // Call template v/404.php
 view('v/404');
 exit(1);
}

/* B2Core system class*/
// Abstract controller class, it is recommended that all controllers be based on this class or a subclass of this class
class c {
 function index()
 {
 echo "Based on B2 v ".VERSION." Create";
 }
}

// Database operation class
class db {
 var $link;
 var $last_query;
 function __construct($conf)
 {
 $this->link = mysql_connect($conf['host'],$conf['user'], $conf['password']);
 if (!$this->link) {
 die('Unable to connect: ' . mysql_error( ));
 return FALSE;
 }
 $db_selected = mysql_select_db($conf['default_db']);
 if (!$db_selected) {
 die('Unable to use: ' . mysql_error());
 }
 mysql_query ('set names utf8',$this->link);
 }

 //Execute query query, if the result is an array, return array data
 function query($query)
 {
 $ret = array() ;
 $this->last_query = $query;
 $result = mysql_query($query,$this->link);
 if (!$result) {
 echo "DB Error, could not query the databasen";
 echo 'MySQL Error: ' . mysql_error();
 echo 'Error Query: ' . $query;
 exit;
 }
 if($result == 1 )return TRUE;
 while($record = mysql_fetch_assoc($result ))
 {
 $ret[] = $record;
 }
 return $ret;
 }

 function insert_id() {return mysql_insert_id();}

 // Execute multiple SQL statements
 function muti_query($query )
 {
 $sq = explode(";n",$query);
 foreach($sq as $s){
 if(trim($s)!= '')$this->query($s );
 }
 }
}

// Module class encapsulates common CURD module operations. It is recommended that all modules inherit this class.
class m {
 var $db;
 var $table;
 var $fields;
 var $key;
 function __construct()
 {
 global $db;
 $this->db = $db;
 $this ->key = 'id';
 }

 public function __call($name, $arg) {
 return call_user_func_array(array($this, $name), $arg);
 }

 // Insert into database Array format data
 function add($elem = FALSE)
 {
 $query_list = array();
 if(!$elem)$elem = $_POST;
 foreach($this->fields as $f) {
 if(isset($elem[$f])){
 $elem[$f] = addslashes($elem[$f]);
 $query_list[] = "`$f` = '$elem[$f] '";
 }
 }
 $this->db->query("insert into `$this->table` set ".implode(',',$query_list));
 return $this-> ;db->insert_id();
 }

 // Delete a certain piece of data
 function del($id)
 {
 $this->db->query("delete from `$this->table ` where ".$this->key."='$id'");
 }

 // Update data
 function update($id , $elem = FALSE)
 {
 $query_list = array();
 if(!$elem)$elem = $_POST;
 foreach($this->fields as $f) {
 if(isset($elem[$f])){
 $elem[$f] = addslashes ($elem[$f]);
 $query_list[] = "`$f` = '$elem[$f]'";
 }
 }
 $this->db->query("update ` $this->table` set ".implode(',',$query_list)." where ".$this->key." ='$id'" );
 }

 // Count quantity
 function count($where='')
 {
 $res = $this->db->query("select count(*) as a from `$this->table` where 1 $where");
 return $res[0]['a'];
 }

 /* get($id) to get one piece of data or
 * get($postquery = '',$cur = 1,$psize = 30) to get multiple pieces data
 */
 function get()
 {
 $args = func_get_args();
 if(is_numeric($args[0])) return $this->__call('get_one', $args);
 return $ this->__call('get_many', $args);
 }

 function get_one($id)
 {
 $id = is_numeric($id)?$id:0;
 $res = $this-> db->query("select * from `$this->table` where ".$this->key."='$id'");
 if(isset($res[0]))return $res[0];
 return false;
 }

 function get_many($postquery = '',$cur = 1,$psize = 30)
 {
 $cur = $cur > 0 ?$cur:1;
 $start = ($cur - 1) * $psize;
 $query = "select * from `$this->table` where 1 $postquery limit $start , $psize";
 return $this->db ->query($query);
 }
}

// All configuration content can be maintained in this file
error_reporting(E_ERROR);
if(file_exists(APP.'config_user.php')) require(APP.'config_user.php') ;
//Configure url routing
$route_config = array(
 '/reg/'=>'/user/reg/',
 '/logout/'=>'/user/logout/',
);

define('BASE','/');

/* The database is configured according to SAE by default*/
$db_config = array(
 'host'=>SAE_MYSQL_HOST_M.':'.SAE_MYSQL_PORT,
 'user' =>SAE_MYSQL_USER,
 'password'=>SAE_MYSQL_PASS,
 'default_db'=>SAE_MYSQL_DB
);