silverstripe-framework/core/Core.php

297 lines
9.3 KiB
PHP

<?php
/**
* This file is the Framework bootstrap. It will get your environment ready to call Director::direct().
*
* It takes care of:
* - Including Constants.php to include _ss_environment and initialise necessary constants
* - Checking of PHP memory limit
* - Including all the files needed to get the manifest built
* - Building and including the manifest
*
* @todo This file currently contains a lot of bits and pieces, and its various responsibilities should probably be
* moved into different subsystems.
* @todo A lot of this stuff is very order-dependent. This could be decoupled.
*
* @package framework
* @subpackage core
*/
/**
* All errors are reported, including E_STRICT by default *unless* the site is in
* live mode, where reporting is limited to fatal errors and warnings (see later in this file)
*/
error_reporting(E_ALL | E_STRICT);
/**
* Include Constants (if it hasn't already been included) to pull in BASE_PATH, etc
*/
require_once dirname(__FILE__).'/Constants.php';
global $_increase_time_limit_max;
$_increase_time_limit_max = -1;
/**
* Priorities definition. These constants are used in calls to _t() as an optional argument
*/
define('PR_HIGH',100);
define('PR_MEDIUM',50);
define('PR_LOW',10);
/**
* Ensure we have enough memory
*/
increase_memory_limit_to('64M');
/**
* Ensure we don't run into xdebug's fairly conservative infinite recursion protection limit
*/
increase_xdebug_nesting_level_to(200);
/**
* Set default encoding
*/
mb_http_output('UTF-8');
mb_internal_encoding('UTF-8');
mb_regex_encoding('UTF-8');
/**
* Enable better garbage collection
*/
gc_enable();
// Include the files needed the initial manifest building, as well as any files
// that are needed for the boostrap process on every request.
require_once 'cache/Cache.php';
require_once 'core/Object.php';
require_once 'core/ClassInfo.php';
require_once 'core/DAG.php';
require_once 'core/Config.php';
require_once 'view/TemplateGlobalProvider.php';
require_once 'control/Director.php';
require_once 'dev/Debug.php';
require_once 'dev/DebugView.php';
require_once 'dev/Backtrace.php';
require_once 'dev/ZendLog.php';
require_once 'dev/Log.php';
require_once 'filesystem/FileFinder.php';
require_once 'core/manifest/ManifestCache.php';
require_once 'core/manifest/ClassLoader.php';
require_once 'core/manifest/ConfigManifest.php';
require_once 'core/manifest/ConfigStaticManifest.php';
require_once 'core/manifest/ClassManifest.php';
require_once 'core/manifest/ManifestFileFinder.php';
require_once 'core/manifest/TemplateLoader.php';
require_once 'core/manifest/TemplateManifest.php';
require_once 'core/manifest/TokenisedRegularExpression.php';
require_once 'control/injector/Injector.php';
// Initialise the dependency injector as soon as possible, as it is
// subsequently used by some of the following code
$injector = new Injector(array('locator' => 'SilverStripeServiceConfigurationLocator'));
Injector::set_inst($injector);
///////////////////////////////////////////////////////////////////////////////
// MANIFEST
// Regenerate the manifest if ?flush is set, or if the database is being built.
// The coupling is a hack, but it removes an annoying bug where new classes
// referenced in _config.php files can be referenced during the build process.
$requestURL = isset($_REQUEST['url']) ? trim($_REQUEST['url'], '/') : false;
$flush = (isset($_GET['flush']) || $requestURL === trim(BASE_URL . '/dev/build', '/'));
global $manifest;
$manifest = new SS_ClassManifest(BASE_PATH, false, $flush);
// Register SilverStripe's class map autoload
$loader = SS_ClassLoader::instance();
$loader->registerAutoloader();
$loader->pushManifest($manifest);
// Fall back to Composer's autoloader (e.g. for PHPUnit), if composer is used
if(file_exists(BASE_PATH . '/vendor/autoload.php')) {
require_once BASE_PATH . '/vendor/autoload.php';
}
// Now that the class manifest is up, load the static configuration
$configManifest = new SS_ConfigStaticManifest(BASE_PATH, false, $flush);
Config::inst()->pushConfigStaticManifest($configManifest);
// And then the yaml configuration
$configManifest = new SS_ConfigManifest(BASE_PATH, false, $flush);
Config::inst()->pushConfigYamlManifest($configManifest);
// Load template manifest
SS_TemplateLoader::instance()->pushManifest(new SS_TemplateManifest(
BASE_PATH, project(), false, $flush
));
// If in live mode, ensure deprecation, strict and notices are not reported
if(Director::isLive()) {
error_reporting(E_ALL & ~(E_DEPRECATED | E_STRICT | E_NOTICE));
}
///////////////////////////////////////////////////////////////////////////////
// POST-MANIFEST COMMANDS
/**
* Load error handlers
*/
Debug::loadErrorHandlers();
///////////////////////////////////////////////////////////////////////////////
// HELPER FUNCTIONS
/**
* Creates a class instance by the "singleton" design pattern.
* It will always return the same instance for this class,
* which can be used for performance reasons and as a simple
* way to access instance methods which don't rely on instance
* data (e.g. the custom SilverStripe static handling).
*
* @param string $className
* @return Object
*/
function singleton($className) {
if($className == "Config") user_error("Don't pass Config to singleton()", E_USER_ERROR);
if(!isset($className)) user_error("singleton() Called without a class", E_USER_ERROR);
if(!is_string($className)) user_error("singleton() passed bad class_name: " . var_export($className,true),
E_USER_ERROR);
return Injector::inst()->get($className);
}
function project() {
global $project;
return $project;
}
/**
* @see i18n::_t()
*/
function _t($entity, $string = "", $context = "", $injection = "") {
return i18n::_t($entity, $string, $context, $injection);
}
/**
* Increase the memory limit to the given level if it's currently too low.
* Only increases up to the maximum defined in {@link set_increase_memory_limit_max()},
* and defaults to the 'memory_limit' setting in the PHP configuration.
*
* @param A memory limit string, such as "64M". If omitted, unlimited memory will be set.
* @return Boolean TRUE indicates a successful change, FALSE a denied change.
*/
function increase_memory_limit_to($memoryLimit = -1) {
$curLimit = ini_get('memory_limit');
// Can't go higher than infinite
if($curLimit == -1 ) return true;
// Check hard maximums
$max = get_increase_memory_limit_max();
if($max && $max != -1 && trANSLATE_MEMSTRING($memoryLimit) > translate_memstring($max)) return false;
// Increase the memory limit if it's too low
if($memoryLimit == -1 || translate_memstring($memoryLimit) > translate_memstring($curLimit)) {
ini_set('memory_limit', $memoryLimit);
}
return true;
}
$_increase_memory_limit_max = ini_get('memory_limit');
/**
* Set the maximum allowed value for {@link increase_memory_limit_to()}.
* The same result can also be achieved through 'suhosin.memory_limit'
* if PHP is running with the Suhosin system.
*
* @param Memory limit string
*/
function set_increase_memory_limit_max($memoryLimit) {
global $_increase_memory_limit_max;
$_increase_memory_limit_max = $memoryLimit;
}
/**
* @return Memory limit string
*/
function get_increase_memory_limit_max() {
global $_increase_memory_limit_max;
return $_increase_memory_limit_max;
}
/**
* Increases the XDebug parameter max_nesting_level, which limits how deep recursion can go.
* Only does anything if (a) xdebug is installed and (b) the new limit is higher than the existing limit
*
* @param int $limit - The new limit to increase to
*/
function increase_xdebug_nesting_level_to($limit) {
if (function_exists('xdebug_enable')) {
$current = ini_get('xdebug.max_nesting_level');
if ((int)$current < $limit) ini_set('xdebug.max_nesting_level', $limit);
}
}
/**
* Turn a memory string, such as 512M into an actual number of bytes.
*
* @param A memory limit string, such as "64M"
*/
function translate_memstring($memString) {
switch(strtolower(substr($memString, -1))) {
case "k": return round(substr($memString, 0, -1)*1024);
case "m": return round(substr($memString, 0, -1)*1024*1024);
case "g": return round(substr($memString, 0, -1)*1024*1024*1024);
default: return round($memString);
}
}
/**
* Increase the time limit of this script. By default, the time will be unlimited.
* Only works if 'safe_mode' is off in the PHP configuration.
* Only values up to {@link get_increase_time_limit_max()} are allowed.
*
* @param $timeLimit The time limit in seconds. If omitted, no time limit will be set.
* @return Boolean TRUE indicates a successful change, FALSE a denied change.
*/
function increase_time_limit_to($timeLimit = null) {
$max = get_increase_time_limit_max();
if($max != -1 && $max != null && $timeLimit > $max) return false;
if(!ini_get('safe_mode')) {
if(!$timeLimit) {
set_time_limit(0);
return true;
} else {
$currTimeLimit = ini_get('max_execution_time');
// Only increase if its smaller
if($currTimeLimit && $currTimeLimit < $timeLimit) {
set_time_limit($timeLimit);
}
return true;
}
} else {
return false;
}
}
/**
* Set the maximum allowed value for {@link increase_timeLimit_to()};
*
* @param Int Limit in seconds
*/
function set_increase_time_limit_max($timeLimit) {
global $_increase_time_limit_max;
$_increase_time_limit_max = $timeLimit;
}
/**
* @return Int Limit in seconds
*/
function get_increase_time_limit_max() {
global $_increase_time_limit_max;
return $_increase_time_limit_max;
}