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limonade.php
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limonade.php
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<?php
# ============================================================================ #
/**
* L I M O N A D E
*
* a PHP micro framework.
*
* For more informations: {@link http://github/sofadesign/limonade}
*
* @author Fabrice Luraine
* @copyright Copyright (c) 2009 Fabrice Luraine
* @license http://opensource.org/licenses/mit-license.php The MIT License
* @package limonade
*/
# ----------------------------------------------------------------------- #
# Copyright (c) 2009 Fabrice Luraine #
# #
# Permission is hereby granted, free of charge, to any person #
# obtaining a copy of this software and associated documentation #
# files (the "Software"), to deal in the Software without #
# restriction, including without limitation the rights to use, #
# copy, modify, merge, publish, distribute, sublicense, and/or sell #
# copies of the Software, and to permit persons to whom the #
# Software is furnished to do so, subject to the following #
# conditions: #
# #
# The above copyright notice and this permission notice shall be #
# included in all copies or substantial portions of the Software. #
# #
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, #
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES #
# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND #
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT #
# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, #
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING #
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR #
# OTHER DEALINGS IN THE SOFTWARE. #
# ============================================================================ #
# ============================================================================ #
# 0. PREPARE #
# ============================================================================ #
## CONSTANTS __________________________________________________________________
/**
* Limonade version
*/
define('LIMONADE', '0.4');
define('LIM_START_MICROTIME', (float)substr(microtime(), 0, 10));
define('LIM_SESSION_NAME', 'Fresh_and_Minty_Limonade_App');
define('LIM_SESSION_FLASH_KEY', '_lim_flash_messages');
define('E_LIM_HTTP', 32768);
define('E_LIM_PHP', 65536);
define('E_LIM_DEPRECATED', 35000);
define('NOT_FOUND', 404);
define('SERVER_ERROR', 500);
define('ENV_PRODUCTION', 10);
define('ENV_DEVELOPMENT', 100);
define('X-SENDFILE', 10);
define('X-LIGHTTPD-SEND-FILE', 20);
# for PHP 5.3.0 <
if(!defined('E_DEPRECATED')) define('E_DEPRECATED', 8192);
if(!defined('E_USER_DEPRECATED')) define('E_USER_DEPRECATED', 16384);
## SETTING BASIC SECURITY _____________________________________________________
# A. Unsets all global variables set from a superglobal array
/**
* @access private
* @return void
*/
function unregister_globals()
{
$args = func_get_args();
foreach($args as $k => $v)
if(array_key_exists($k, $GLOBALS)) unset($GLOBALS[$k]);
}
if(ini_get('register_globals'))
{
unregister_globals( '_POST', '_GET', '_COOKIE', '_REQUEST', '_SERVER',
'_ENV', '_FILES');
ini_set('register_globals', 0);
}
# B. removing magic quotes
/**
* @access private
* @param string $array
* @return array
*/
function remove_magic_quotes($array)
{
foreach ($array as $k => $v)
$array[$k] = is_array($v) ? remove_magic_quotes($v) : stripslashes($v);
return $array;
}
if (get_magic_quotes_gpc())
{
$_GET = remove_magic_quotes($_GET);
$_POST = remove_magic_quotes($_POST);
$_COOKIE = remove_magic_quotes($_COOKIE);
ini_set('magic_quotes_gpc', 0);
}
if(get_magic_quotes_runtime()) set_magic_quotes_runtime(false);
# C. Disable error display
# by default, no error reporting; it will be switched on later in run().
# ini_set('display_errors', 1); must be called explicitly in app file
# if you want to show errors before running app
ini_set('display_errors', 0);
# # #
# ============================================================================ #
# 1. BASE #
# ============================================================================ #
## ABSTRACTS ___________________________________________________________________
# function configure(){}
# function before(){}
# function after(){}
# function not_found(){}
# function server_error(){}
# function route_missing(){}
# function before_exit(){}
## MAIN PUBLIC FUNCTIONS _______________________________________________________
/**
* Set and returns options values
*
* If multiple values are provided, set $name option with an array of those values.
* If there is only one value, set $name option with the provided $values
*
* @param string $name
* @param mixed $values,...
* @return mixed option value for $name if $name argument is provided, else return all options
*/
function option($name = null, $values = null)
{
static $options = array();
$args = func_get_args();
$name = array_shift($args);
if(is_null($name)) return $options;
if(!empty($args))
{
$options[$name] = count($args) > 1 ? $args : $args[0];
}
if(array_key_exists($name, $options)) return $options[$name];
return;
}
/**
* Set and returns params
*
* Depending on provided arguments:
*
* * Reset params if first argument is null
*
* * If first argument is an array, merge it with current params
*
* * If there is a second argument $value, set param $name (first argument) with $value
* <code>
* params('name', 'Doe') // set 'name' => 'Doe'
* </code>
* * If there is more than 2 arguments, set param $name (first argument) value with
* an array of next arguments
* <code>
* params('months', 'jan', 'feb', 'mar') // set 'month' => array('months', 'jan', 'feb', 'mar')
* </code>
*
* @param mixed $name_or_array_or_null could be null || array of params || name of a param (optional)
* @param mixed $value,... for the $name param (optional)
* @return mixed all params, or one if a first argument $name is provided
*/
function params($name_or_array_or_null = null, $value = null)
{
static $params = array();
$args = func_get_args();
if(func_num_args() > 0)
{
$name = array_shift($args);
if(is_null($name))
{
# Reset params
$params = array();
return $params;
}
if(is_array($name))
{
$params = array_merge($params, $name);
return $params;
}
$nargs = count($args);
if($nargs > 0)
{
$value = $nargs > 1 ? $args : $args[0];
$params[$name] = $value;
}
return array_key_exists($name,$params) ? $params[$name] : null;
}
return $params;
}
/**
* Set and returns template variables
*
* If multiple values are provided, set $name variable with an array of those values.
* If there is only one value, set $name variable with the provided $values
*
* @param string $name
* @param mixed $values,...
* @return mixed variable value for $name if $name argument is provided, else return all variables
*/
function set($name = null, $values = null)
{
static $vars = array();
$args = func_get_args();
$name = array_shift($args);
if(is_null($name)) return $vars;
if(!empty($args))
{
$vars[$name] = count($args) > 1 ? $args : $args[0];
}
if(array_key_exists($name, $vars)) return $vars[$name];
return $vars;
}
/**
* Sets a template variable with a value or a default value if value is empty
*
* @param string $name
* @param string $value
* @param string $default
* @return mixed setted value
*/
function set_or_default($name, $value, $default)
{
return set($name, value_or_default($value, $default));
}
/**
* Running application
*
* @param string $env
* @return void
*/
function run($env = null)
{
if(is_null($env)) $env = env();
# 0. Set default configuration
$root_dir = dirname(app_file());
option('root_dir', $root_dir);
option('limonade_dir', dirname(__FILE__).'/');
option('limonade_views_dir', dirname(__FILE__).'/limonade/views/');
option('limonade_public_dir',dirname(__FILE__).'/limonade/public/');
option('public_dir', $root_dir.'/public/');
option('views_dir', $root_dir.'/views/');
option('controllers_dir', $root_dir.'/controllers/');
option('lib_dir', $root_dir.'/lib/');
option('env', ENV_PRODUCTION);
option('debug', true);
option('session', LIM_SESSION_NAME); // true, false or the name of your session
option('encoding', 'utf-8');
option('x-sendfile', 0); // 0: disabled,
// X-SENDFILE: for Apache and Lighttpd v. >= 1.5,
// X-LIGHTTPD-SEND-FILE: for Apache and Lighttpd v. < 1.5
# 1. Set error handling
ini_set('display_errors', 1);
set_error_handler('error_handler_dispatcher', E_ALL ^ E_NOTICE);
# 2. Set user configuration
call_if_exists('configure');
# 3. Loading libs
require_once_dir(option('lib_dir'));
# 4. Starting session
if(!defined('SID') && option('session'))
{
if(!is_bool(option('session'))) session_name(option('session'));
if(!session_start()) trigger_error("An error occured while trying to start the session", E_USER_WARNING);
}
# 5. Set some default methods if needed
if(!function_exists('after'))
{
function after($output)
{
return $output;
}
}
if(!function_exists('route_missing'))
{
function route_missing($request_method, $request_uri)
{
halt(NOT_FOUND, "($request_method) $request_uri");
}
}
# 6. Set default routes used for default views
dispatch(array("/_lim_css/*.css", array('_lim_css_filename')), 'render_limonade_css');
/**
* Internal controller that responds to route /_lim_css/*.css
*
* @access private
* @return string
*/
function render_limonade_css()
{
option('views_dir', file_path(option('limonade_public_dir'), 'css'));
$fpath = file_path(params('_lim_css_filename').".css");
return css($fpath);
}
dispatch(array("/_lim_public/**", array('_lim_public_file')), 'render_limonade_file');
/**
* Internal controller that responds to route /_lim_public/**
*
* @access private
* @return void
*/
function render_limonade_file()
{
$fpath = file_path(option('limonade_public_dir'), params('_lim_public_file'));
return render_file($fpath, true);
}
# 7. Check request
if($rm = request_method())
{
if(!request_method_is_allowed($rm))
halt(HTTP_NOT_IMPLEMENTED, "The requested method <code>'$rm'</code> is not implemented");
# 5.1 Check matching route
if($route = route_find($rm, request_uri()))
{
params($route['params']);
# 5.2 Load controllers dir
require_once_dir(option('controllers_dir'));
if(function_exists($route['function']))
{
# 5.3 Call before function
call_if_exists('before');
# 5.4 Call matching controller function and output result
if($output = call_user_func($route['function']))
{
echo after(error_notices_render() . $output);
}
stop_and_exit();
}
else halt(SERVER_ERROR, "Routing error: undefined function '{$route['function']}'", $route);
}
else route_missing($rm, request_uri());
}
else halt(HTTP_NOT_IMPLEMENTED, "The requested method <code>'$rm'</code> is not implemented");
}
/**
* Stop and exit limonade application
*
* @access private
* @return void
*/
function stop_and_exit()
{
call_if_exists('before_exit');
flash_sweeper();
if(defined('SID')) session_write_close();
exit;
}
/**
* Returns limonade environment variables:
*
* 'SERVER', 'FILES', 'REQUEST', 'SESSION', 'ENV', 'COOKIE',
* 'GET', 'POST', 'PUT', 'DELETE'
*
* If a null argument is passed, reset and rebuild environment
*
* @param null @reset reset and rebuild environment
* @return array
*/
function env($reset = null)
{
static $env = array();
if(func_num_args() > 0)
{
$args = func_get_args();
if(is_null($args[0])) $env = array();
}
if(empty($env))
{
$glo_names = array('SERVER', 'FILES', 'REQUEST', 'SESSION', 'ENV', 'COOKIE');
$vars = array_merge($glo_names, request_methods());
foreach($vars as $var)
{
$varname = "_$var";
if(!array_key_exists($varname, $GLOBALS)) $GLOBALS[$varname] = array();
$env[$var] =& $GLOBALS[$varname];
}
$method = request_method($env);
if($method == 'PUT' || $method == 'DELETE')
{
$varname = "_$method";
if(array_key_exists('_method', $_POST) && $_POST['_method'] == $method)
{
foreach($_POST as $k => $v)
{
if($k == "_method") continue;
$GLOBALS[$varname][$k] = $v;
}
}
else
{
parse_str(file_get_contents('php://input'), $GLOBALS[$varname]);
}
}
}
return $env;
}
/**
* Returns application root file path
*
* @return string
*/
function app_file()
{
static $file;
if(empty($file))
{
$stacktrace = array_pop(debug_backtrace());
$file = $stacktrace['file'];
}
return $file;
}
# # #
# ============================================================================ #
# 2. ERROR #
# ============================================================================ #
/**
* Associate a function with error code(s) and return all associations
*
* @param string $errno
* @param string $function
* @return array
*/
function error($errno = null, $function = null)
{
static $errors = array();
if(func_num_args() > 0)
{
$errors[] = array('errno'=>$errno, 'function'=> $function);
}
return $errors;
}
/**
* Raise an error, passing a given error number and an optional message,
* then exit.
* Error number should be a HTTP status code or a php user error (E_USER...)
* $errno and $msg arguments can be passsed in any order
* If no arguments are passed, default $errno is SERVER_ERROR (500)
*
* @param int,string $errno Error number or message string
* @param string,string $msg Message string or error number
* @param mixed $debug_args extra data provided for debugging
* @return void
*/
function halt($errno = SERVER_ERROR, $msg = '', $debug_args = null)
{
$args = func_get_args();
$error = array_shift($args);
# switch $errno and $msg args
# TODO cleanup / refactoring
if(is_string($errno))
{
$msg = $errno;
$oldmsg = array_shift($args);
$errno = empty($oldmsg) ? SERVER_ERROR : $oldmsg;
}
else if(!empty($args)) $msg = array_shift($args);
if(empty($msg) && $errno == NOT_FOUND) $msg = request_uri();
if(empty($msg)) $msg = "";
if(!empty($args)) $debug_args = $args;
set('_lim_err_debug_args', $debug_args);
error_handler_dispatcher($errno, $msg, null, null);
}
/**
* Internal error handler dispatcher
* Find and call matching error handler and exit
* If no match found, call default error handler
*
* @access private
* @param int $errno
* @param string $errstr
* @param string $errfile
* @param string $errline
* @return void
*/
function error_handler_dispatcher($errno, $errstr, $errfile, $errline)
{
$back_trace = debug_backtrace();
while($trace = array_shift($back_trace))
{
if($trace['function'] == 'halt')
{
$errfile = $trace['file'];
$errline = $trace['line'];
break;
}
}
# Notices and warning won't halt execution
if(error_wont_halt_app($errno))
{
error_notice($errno, $errstr, $errfile, $errline);
return;
}
else
{
# Other errors will stop application
$handlers = error();
$is_http_err = http_response_status_is_valid($errno);
foreach($handlers as $handler)
{
$e = is_array($handler['errno']) ? $handler['errno'] : array($handler['errno']);
while($ee = array_shift($e))
{
if($ee == $errno || $ee == E_LIM_PHP || ($ee == E_LIM_HTTP && $is_http_err))
{
echo call_if_exists($handler['function'], $errno, $errstr, $errfile, $errline);
exit;
}
}
}
echo error_default_handler($errno, $errstr, $errfile, $errline);
stop_and_exit();
}
}
/**
* Default error handler
*
* @param string $errno
* @param string $errstr
* @param string $errfile
* @param string $errline
* @return string error output
*/
function error_default_handler($errno, $errstr, $errfile, $errline)
{
$is_http_err = http_response_status_is_valid($errno);
$http_error_code = $is_http_err ? $errno : SERVER_ERROR;
status($http_error_code);
return $http_error_code == NOT_FOUND ?
error_not_found_output($errno, $errstr, $errfile, $errline) :
error_server_error_output($errno, $errstr, $errfile, $errline);
}
/**
* Returns not found error output
*
* @access private
* @param string $msg
* @return string
*/
function error_not_found_output($errno, $errstr, $errfile, $errline)
{
if(!function_exists('not_found'))
{
/**
* Default not found error output
*
* @param string $errno
* @param string $errstr
* @param string $errfile
* @param string $errline
* @return string
*/
function not_found($errno, $errstr, $errfile=null, $errline=null)
{
option('views_dir', option('limonade_views_dir'));
$msg = h(rawurldecode($errstr));
return html("<h1>Page not found:</h1><p><code>{$msg}</code></p>", error_layout());
}
}
return not_found($errno, $errstr, $errfile, $errline);
}
/**
* Returns server error output
*
* @access private
* @param int $errno
* @param string $errstr
* @param string $errfile
* @param string $errline
* @return string
*/
function error_server_error_output($errno, $errstr, $errfile, $errline)
{
if(!function_exists('server_error'))
{
/**
* Default server error output
*
* @param string $errno
* @param string $errstr
* @param string $errfile
* @param string $errline
* @return string
*/
function server_error($errno, $errstr, $errfile=null, $errline=null)
{
$is_http_error = http_response_status_is_valid($errno);
$args = compact('errno', 'errstr', 'errfile', 'errline', 'is_http_error');
option('views_dir', option('limonade_views_dir'));
return html('error.html.php', error_layout(), $args);
}
}
return server_error($errno, $errstr, $errfile, $errline);
}
/**
* Set and returns error output layout
*
* @param string $layout
* @return string
*/
function error_layout($layout = false)
{
static $o_layout = 'default_layout.php';
if($layout !== false) $o_layout = $layout;
return $o_layout;
}
/**
* Set a notice if arguments are provided
* Returns all stored notices.
* If $errno argument is null, reset the notices array
*
* @access private
* @param string, null $str
* @return array
*/
function error_notice($errno = false, $errstr = null, $errfile = null, $errline = null)
{
static $notices = array();
if($errno) $notices[] = compact('errno', 'errstr', 'errfile', 'errline');
else if(is_null($errno)) $notices = array();
return $notices;
}
/**
* Returns notices output rendering and reset notices
*
* @return string
*/
function error_notices_render()
{
if(option('debug') && option('env') > ENV_PRODUCTION)
{
$notices = error_notice();
error_notice(null); // reset notices
$c_view_dir = option('views_dir'); // keep for restore after render
option('views_dir', option('limonade_views_dir'));
$o = render('_notices.html.php', null, array('notices' => $notices));
option('views_dir', $c_view_dir); // restore current views dir
return $o;
}
}
/**
* Checks if an error is will halt application execution.
* Notices and warnings will not.
*
* @access private
* @param string $num error code number
* @return boolean
*/
function error_wont_halt_app($num)
{
return $num == E_NOTICE ||
$num == E_WARNING ||
$num == E_CORE_WARNING ||
$num == E_COMPILE_WARNING ||
$num == E_USER_WARNING ||
$num == E_USER_NOTICE ||
$num == E_DEPRECATED ||
$num == E_USER_DEPRECATED ||
$num == E_LIM_DEPRECATED;
}
/**
* return error code name for a given code num, or return all errors names
*
* @param string $num
* @return mixed
*/
function error_type($num = null)
{
$types = array (
E_ERROR => 'ERROR',
E_WARNING => 'WARNING',
E_PARSE => 'PARSING ERROR',
E_NOTICE => 'NOTICE',
E_CORE_ERROR => 'CORE ERROR',
E_CORE_WARNING => 'CORE WARNING',
E_COMPILE_ERROR => 'COMPILE ERROR',
E_COMPILE_WARNING => 'COMPILE WARNING',
E_USER_ERROR => 'USER ERROR',
E_USER_WARNING => 'USER WARNING',
E_USER_NOTICE => 'USER NOTICE',
E_STRICT => 'STRICT NOTICE',
E_RECOVERABLE_ERROR => 'RECOVERABLE ERROR',
E_DEPRECATED => 'DEPRECATED WARNING',
E_USER_DEPRECATED => 'USER DEPRECATED WARNING',
E_LIM_DEPRECATED => 'LIMONADE DEPRECATED WARNING'
);
return is_null($num) ? $types : $types[$num];
}
/**
* Returns http response status for a given error number
*
* @param string $errno
* @return int
*/
function error_http_status($errno)
{
$code = http_response_status_is_valid($errno) ? $errno : SERVER_ERROR;
return http_response_status($code);
}
# # #
# ============================================================================ #
# 3. REQUEST #
# ============================================================================ #
/**
* Returns current request method for a given environment or current one
*
* @param string $env
* @return string
*/
function request_method($env = null)
{
if(is_null($env)) $env = env();
$m = array_key_exists('REQUEST_METHOD', $env['SERVER']) ? $env['SERVER']['REQUEST_METHOD'] : null;
if($m == "POST" && array_key_exists('_method', $env['POST']))
$m = strtoupper($env['POST']['_method']);
if(!in_array(strtoupper($m), request_methods()))
{
trigger_error("'$m' request method is unkown or unavailable.", E_USER_WARNING);
$m = false;
}
return $m;
}
/**
* Checks if a request method or current one is allowed
*
* @param string $m
* @return bool
*/
function request_method_is_allowed($m = null)
{
if(is_null($m)) $m = request_method();
return in_array(strtoupper($m), request_methods());
}
/**
* Checks if request method is GET
*
* @param string $env
* @return bool
*/
function request_is_get($env = null)
{
return request_method($env) == "GET";
}
/**
* Checks if request method is POST
*
* @param string $env
* @return bool
*/
function request_is_post($env = null)
{
return request_method($env) == "POST";
}
/**
* Checks if request method is PUT
*
* @param string $env
* @return bool
*/
function request_is_put($env = null)
{
return request_method($env) == "PUT";
}
/**
* Checks if request method is DELETE
*
* @param string $env
* @return bool
*/
function request_is_delete($env = null)
{
return request_method($env) == "DELETE";
}
/**
* Returns allowed request methods
*
* @return array
*/
function request_methods()
{
return array("GET","POST","PUT","DELETE");
}
/**
* Returns current request uri (the path that will be compared with routes)
*
* (Inspired from codeigniter URI::_fetch_uri_string method)
*
* @return string
*/
function request_uri($env = null)
{
static $uri = null;
if(is_null($env))
{
if(!is_null($uri)) return $uri;
$env = env();
}
if(array_key_exists('uri', $env['GET']))
{
$uri = $env['GET']['uri'];
}
else if(array_key_exists('u', $env['GET']))
{
$uri = $env['GET']['u'];
}
// bug: dot are converted to _... so we can't use it...
// else if (count($env['GET']) == 1 && trim(key($env['GET']), '/') != '')
// {
// $uri = key($env['GET']);
// }
else
{
$app_file = app_file();
$path_info = isset($env['SERVER']['PATH_INFO']) ? $env['SERVER']['PATH_INFO'] : @getenv('PATH_INFO');
$query_string = isset($env['SERVER']['QUERY_STRING']) ? $env['SERVER']['QUERY_STRING'] : @getenv('QUERY_STRING');
// Is there a PATH_INFO variable?
// Note: some servers seem to have trouble with getenv() so we'll test it two ways
if (trim($path_info, '/') != '' && $path_info != "/".$app_file)
{
$uri = $path_info;
}
// No PATH_INFO?... What about QUERY_STRING?
elseif (trim($query_string, '/') != '')
{
$uri = $query_string;
}
elseif(array_key_exists('REQUEST_URI', $env['SERVER']) && !empty($env['SERVER']['REQUEST_URI']))
{
$request_uri = rtrim(rawurldecode($env['SERVER']['REQUEST_URI']), '?/').'/';
$base_path = $env['SERVER']['SCRIPT_NAME'];
if($request_uri."index.php" == $base_path) $request_uri .= "index.php";
$uri = str_replace($base_path, '', $request_uri);
}
elseif($env['SERVER']['argc'] > 1 && trim($env['SERVER']['argv'][1], '/') != '')
{
$uri = $env['SERVER']['argv'][1];
}
}
$uri = rtrim($uri, "/"); # removes ending /
if(empty($uri))
{
$uri = '/';
}
else if($uri[0] != '/')
{
$uri = '/' . $uri; # add a leading slash
}
return $uri;
}
# # #
# ============================================================================ #
# 4. ROUTER #
# ============================================================================ #
/**
* an alias of dispatch_get
*
* @return void
*/
function dispatch($path_or_array, $function)
{
dispatch_get($path_or_array, $function);
}
/**
* Add a GET route
*
* @param string $path_or_array
* @param string $function
* @return void
*/
function dispatch_get($path_or_array, $function)
{
route("GET", $path_or_array, $function);
}
/**