git.fiddlerwoaroof.com
app/SymfonyRequirements.php
4511a7cd
 <?php
 
 /*
  * This file is part of the Symfony package.
  *
  * (c) Fabien Potencier <fabien@symfony.com>
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
 
 /*
  * Users of PHP 5.2 should be able to run the requirements checks.
  * This is why the file and all classes must be compatible with PHP 5.2+
  * (e.g. not using namespaces and closures).
  *
  * ************** CAUTION **************
  *
  * DO NOT EDIT THIS FILE as it will be overridden by Composer as part of
  * the installation/update process. The original file resides in the
  * SensioDistributionBundle.
  *
  * ************** CAUTION **************
  */
 
 /**
  * Represents a single PHP requirement, e.g. an installed extension.
  * It can be a mandatory requirement or an optional recommendation.
  * There is a special subclass, named PhpIniRequirement, to check a php.ini configuration.
  *
  * @author Tobias Schultze <http://tobion.de>
  */
 class Requirement
 {
     private $fulfilled;
     private $testMessage;
     private $helpText;
     private $helpHtml;
     private $optional;
 
     /**
      * Constructor that initializes the requirement.
      *
      * @param bool        $fulfilled   Whether the requirement is fulfilled
      * @param string      $testMessage The message for testing the requirement
      * @param string      $helpHtml    The help text formatted in HTML for resolving the problem
      * @param string|null $helpText    The help text (when null, it will be inferred from $helpHtml, i.e. stripped from HTML tags)
      * @param bool        $optional    Whether this is only an optional recommendation not a mandatory requirement
      */
     public function __construct($fulfilled, $testMessage, $helpHtml, $helpText = null, $optional = false)
     {
         $this->fulfilled = (bool) $fulfilled;
         $this->testMessage = (string) $testMessage;
         $this->helpHtml = (string) $helpHtml;
         $this->helpText = null === $helpText ? strip_tags($this->helpHtml) : (string) $helpText;
         $this->optional = (bool) $optional;
     }
 
     /**
      * Returns whether the requirement is fulfilled.
      *
      * @return bool true if fulfilled, otherwise false
      */
     public function isFulfilled()
     {
         return $this->fulfilled;
     }
 
     /**
      * Returns the message for testing the requirement.
      *
      * @return string The test message
      */
     public function getTestMessage()
     {
         return $this->testMessage;
     }
 
     /**
      * Returns the help text for resolving the problem.
      *
      * @return string The help text
      */
     public function getHelpText()
     {
         return $this->helpText;
     }
 
     /**
      * Returns the help text formatted in HTML.
      *
      * @return string The HTML help
      */
     public function getHelpHtml()
     {
         return $this->helpHtml;
     }
 
     /**
      * Returns whether this is only an optional recommendation and not a mandatory requirement.
      *
      * @return bool true if optional, false if mandatory
      */
     public function isOptional()
     {
         return $this->optional;
     }
 }
 
 /**
  * Represents a PHP requirement in form of a php.ini configuration.
  *
  * @author Tobias Schultze <http://tobion.de>
  */
 class PhpIniRequirement extends Requirement
 {
     /**
      * Constructor that initializes the requirement.
      *
      * @param string        $cfgName           The configuration name used for ini_get()
      * @param bool|callback $evaluation        Either a boolean indicating whether the configuration should evaluate to true or false,
      *                                         or a callback function receiving the configuration value as parameter to determine the fulfillment of the requirement
      * @param bool          $approveCfgAbsence If true the Requirement will be fulfilled even if the configuration option does not exist, i.e. ini_get() returns false.
      *                                         This is helpful for abandoned configs in later PHP versions or configs of an optional extension, like Suhosin.
      *                                         Example: You require a config to be true but PHP later removes this config and defaults it to true internally.
      * @param string|null   $testMessage       The message for testing the requirement (when null and $evaluation is a boolean a default message is derived)
      * @param string|null   $helpHtml          The help text formatted in HTML for resolving the problem (when null and $evaluation is a boolean a default help is derived)
      * @param string|null   $helpText          The help text (when null, it will be inferred from $helpHtml, i.e. stripped from HTML tags)
      * @param bool          $optional          Whether this is only an optional recommendation not a mandatory requirement
      */
     public function __construct($cfgName, $evaluation, $approveCfgAbsence = false, $testMessage = null, $helpHtml = null, $helpText = null, $optional = false)
     {
         $cfgValue = ini_get($cfgName);
 
         if (is_callable($evaluation)) {
             if (null === $testMessage || null === $helpHtml) {
                 throw new InvalidArgumentException('You must provide the parameters testMessage and helpHtml for a callback evaluation.');
             }
 
             $fulfilled = call_user_func($evaluation, $cfgValue);
         } else {
             if (null === $testMessage) {
                 $testMessage = sprintf('%s %s be %s in php.ini',
                     $cfgName,
                     $optional ? 'should' : 'must',
                     $evaluation ? 'enabled' : 'disabled'
                 );
             }
 
             if (null === $helpHtml) {
                 $helpHtml = sprintf('Set <strong>%s</strong> to <strong>%s</strong> in php.ini<a href="#phpini">*</a>.',
                     $cfgName,
                     $evaluation ? 'on' : 'off'
                 );
             }
 
             $fulfilled = $evaluation == $cfgValue;
         }
 
         parent::__construct($fulfilled || ($approveCfgAbsence && false === $cfgValue), $testMessage, $helpHtml, $helpText, $optional);
     }
 }
 
 /**
  * A RequirementCollection represents a set of Requirement instances.
  *
  * @author Tobias Schultze <http://tobion.de>
  */
 class RequirementCollection implements IteratorAggregate
 {
     private $requirements = array();
 
     /**
      * Gets the current RequirementCollection as an Iterator.
      *
      * @return Traversable A Traversable interface
      */
     public function getIterator()
     {
         return new ArrayIterator($this->requirements);
     }
 
     /**
      * Adds a Requirement.
      *
      * @param Requirement $requirement A Requirement instance
      */
     public function add(Requirement $requirement)
     {
         $this->requirements[] = $requirement;
     }
 
     /**
      * Adds a mandatory requirement.
      *
      * @param bool        $fulfilled   Whether the requirement is fulfilled
      * @param string      $testMessage The message for testing the requirement
      * @param string      $helpHtml    The help text formatted in HTML for resolving the problem
      * @param string|null $helpText    The help text (when null, it will be inferred from $helpHtml, i.e. stripped from HTML tags)
      */
     public function addRequirement($fulfilled, $testMessage, $helpHtml, $helpText = null)
     {
         $this->add(new Requirement($fulfilled, $testMessage, $helpHtml, $helpText, false));
     }
 
     /**
      * Adds an optional recommendation.
      *
      * @param bool        $fulfilled   Whether the recommendation is fulfilled
      * @param string      $testMessage The message for testing the recommendation
      * @param string      $helpHtml    The help text formatted in HTML for resolving the problem
      * @param string|null $helpText    The help text (when null, it will be inferred from $helpHtml, i.e. stripped from HTML tags)
      */
     public function addRecommendation($fulfilled, $testMessage, $helpHtml, $helpText = null)
     {
         $this->add(new Requirement($fulfilled, $testMessage, $helpHtml, $helpText, true));
     }
 
     /**
      * Adds a mandatory requirement in form of a php.ini configuration.
      *
      * @param string        $cfgName           The configuration name used for ini_get()
      * @param bool|callback $evaluation        Either a boolean indicating whether the configuration should evaluate to true or false,
      *                                         or a callback function receiving the configuration value as parameter to determine the fulfillment of the requirement
      * @param bool          $approveCfgAbsence If true the Requirement will be fulfilled even if the configuration option does not exist, i.e. ini_get() returns false.
      *                                         This is helpful for abandoned configs in later PHP versions or configs of an optional extension, like Suhosin.
      *                                         Example: You require a config to be true but PHP later removes this config and defaults it to true internally.
      * @param string        $testMessage       The message for testing the requirement (when null and $evaluation is a boolean a default message is derived)
      * @param string        $helpHtml          The help text formatted in HTML for resolving the problem (when null and $evaluation is a boolean a default help is derived)
      * @param string|null   $helpText          The help text (when null, it will be inferred from $helpHtml, i.e. stripped from HTML tags)
      */
     public function addPhpIniRequirement($cfgName, $evaluation, $approveCfgAbsence = false, $testMessage = null, $helpHtml = null, $helpText = null)
     {
         $this->add(new PhpIniRequirement($cfgName, $evaluation, $approveCfgAbsence, $testMessage, $helpHtml, $helpText, false));
     }
 
     /**
      * Adds an optional recommendation in form of a php.ini configuration.
      *
      * @param string        $cfgName           The configuration name used for ini_get()
      * @param bool|callback $evaluation        Either a boolean indicating whether the configuration should evaluate to true or false,
      *                                         or a callback function receiving the configuration value as parameter to determine the fulfillment of the requirement
      * @param bool          $approveCfgAbsence If true the Requirement will be fulfilled even if the configuration option does not exist, i.e. ini_get() returns false.
      *                                         This is helpful for abandoned configs in later PHP versions or configs of an optional extension, like Suhosin.
      *                                         Example: You require a config to be true but PHP later removes this config and defaults it to true internally.
      * @param string        $testMessage       The message for testing the requirement (when null and $evaluation is a boolean a default message is derived)
      * @param string        $helpHtml          The help text formatted in HTML for resolving the problem (when null and $evaluation is a boolean a default help is derived)
      * @param string|null   $helpText          The help text (when null, it will be inferred from $helpHtml, i.e. stripped from HTML tags)
      */
     public function addPhpIniRecommendation($cfgName, $evaluation, $approveCfgAbsence = false, $testMessage = null, $helpHtml = null, $helpText = null)
     {
         $this->add(new PhpIniRequirement($cfgName, $evaluation, $approveCfgAbsence, $testMessage, $helpHtml, $helpText, true));
     }
 
     /**
      * Adds a requirement collection to the current set of requirements.
      *
      * @param RequirementCollection $collection A RequirementCollection instance
      */
     public function addCollection(RequirementCollection $collection)
     {
         $this->requirements = array_merge($this->requirements, $collection->all());
     }
 
     /**
      * Returns both requirements and recommendations.
      *
      * @return array Array of Requirement instances
      */
     public function all()
     {
         return $this->requirements;
     }
 
     /**
      * Returns all mandatory requirements.
      *
      * @return array Array of Requirement instances
      */
     public function getRequirements()
     {
         $array = array();
         foreach ($this->requirements as $req) {
             if (!$req->isOptional()) {
                 $array[] = $req;
             }
         }
 
         return $array;
     }
 
     /**
      * Returns the mandatory requirements that were not met.
      *
      * @return array Array of Requirement instances
      */
     public function getFailedRequirements()
     {
         $array = array();
         foreach ($this->requirements as $req) {
             if (!$req->isFulfilled() && !$req->isOptional()) {
                 $array[] = $req;
             }
         }
 
         return $array;
     }
 
     /**
      * Returns all optional recommendations.
      *
      * @return array Array of Requirement instances
      */
     public function getRecommendations()
     {
         $array = array();
         foreach ($this->requirements as $req) {
             if ($req->isOptional()) {
                 $array[] = $req;
             }
         }
 
         return $array;
     }
 
     /**
      * Returns the recommendations that were not met.
      *
      * @return array Array of Requirement instances
      */
     public function getFailedRecommendations()
     {
         $array = array();
         foreach ($this->requirements as $req) {
             if (!$req->isFulfilled() && $req->isOptional()) {
                 $array[] = $req;
             }
         }
 
         return $array;
     }
 
     /**
      * Returns whether a php.ini configuration is not correct.
      *
      * @return bool php.ini configuration problem?
      */
     public function hasPhpIniConfigIssue()
     {
         foreach ($this->requirements as $req) {
             if (!$req->isFulfilled() && $req instanceof PhpIniRequirement) {
                 return true;
             }
         }
 
         return false;
     }
 
     /**
      * Returns the PHP configuration file (php.ini) path.
      *
      * @return string|false php.ini file path
      */
     public function getPhpIniConfigPath()
     {
         return get_cfg_var('cfg_file_path');
     }
 }
 
 /**
  * This class specifies all requirements and optional recommendations that
  * are necessary to run the Symfony Standard Edition.
  *
  * @author Tobias Schultze <http://tobion.de>
  * @author Fabien Potencier <fabien@symfony.com>
  */
 class SymfonyRequirements extends RequirementCollection
 {
     const REQUIRED_PHP_VERSION = '5.3.3';
 
     /**
      * Constructor that initializes the requirements.
      */
     public function __construct()
     {
         /* mandatory requirements follow */
 
         $installedPhpVersion = phpversion();
 
         $this->addRequirement(
             version_compare($installedPhpVersion, self::REQUIRED_PHP_VERSION, '>='),
             sprintf('PHP version must be at least %s (%s installed)', self::REQUIRED_PHP_VERSION, $installedPhpVersion),
             sprintf('You are running PHP version "<strong>%s</strong>", but Symfony needs at least PHP "<strong>%s</strong>" to run.
                 Before using Symfony, upgrade your PHP installation, preferably to the latest version.',
                 $installedPhpVersion, self::REQUIRED_PHP_VERSION),
             sprintf('Install PHP %s or newer (installed version is %s)', self::REQUIRED_PHP_VERSION, $installedPhpVersion)
         );
 
         $this->addRequirement(
             version_compare($installedPhpVersion, '5.3.16', '!='),
             'PHP version must not be 5.3.16 as Symfony won\'t work properly with it',
             'Install PHP 5.3.17 or newer (or downgrade to an earlier PHP version)'
         );
 
         $this->addRequirement(
             is_dir(__DIR__.'/../vendor/composer'),
             'Vendor libraries must be installed',
             'Vendor libraries are missing. Install composer following instructions from <a href="http://getcomposer.org/">http://getcomposer.org/</a>. '.
                 'Then run "<strong>php composer.phar install</strong>" to install them.'
         );
 
         $cacheDir = is_dir(__DIR__.'/../var/cache') ? __DIR__.'/../var/cache' : __DIR__.'/cache';
 
         $this->addRequirement(
             is_writable($cacheDir),
             'app/cache/ or var/cache/ directory must be writable',
             'Change the permissions of either "<strong>app/cache/</strong>" or  "<strong>var/cache/</strong>" directory so that the web server can write into it.'
         );
 
         $logsDir = is_dir(__DIR__.'/../var/logs') ? __DIR__.'/../var/logs' : __DIR__.'/logs';
 
         $this->addRequirement(
             is_writable($logsDir),
             'app/logs/ or var/logs/ directory must be writable',
             'Change the permissions of either "<strong>app/logs/</strong>" or  "<strong>var/logs/</strong>" directory so that the web server can write into it.'
         );
 
         $this->addPhpIniRequirement(
             'date.timezone', true, false,
             'date.timezone setting must be set',
             'Set the "<strong>date.timezone</strong>" setting in php.ini<a href="#phpini">*</a> (like Europe/Paris).'
         );
 
         if (version_compare($installedPhpVersion, self::REQUIRED_PHP_VERSION, '>=')) {
             $timezones = array();
             foreach (DateTimeZone::listAbbreviations() as $abbreviations) {
                 foreach ($abbreviations as $abbreviation) {
                     $timezones[$abbreviation['timezone_id']] = true;
                 }
             }
 
             $this->addRequirement(
                 isset($timezones[@date_default_timezone_get()]),
                 sprintf('Configured default timezone "%s" must be supported by your installation of PHP', @date_default_timezone_get()),
                 'Your default timezone is not supported by PHP. Check for typos in your <strong>php.ini</strong> file and have a look at the list of deprecated timezones at <a href="http://php.net/manual/en/timezones.others.php">http://php.net/manual/en/timezones.others.php</a>.'
             );
         }
 
         $this->addRequirement(
             function_exists('json_encode'),
             'json_encode() must be available',
             'Install and enable the <strong>JSON</strong> extension.'
         );
 
         $this->addRequirement(
             function_exists('session_start'),
             'session_start() must be available',
             'Install and enable the <strong>session</strong> extension.'
         );
 
         $this->addRequirement(
             function_exists('ctype_alpha'),
             'ctype_alpha() must be available',
             'Install and enable the <strong>ctype</strong> extension.'
         );
 
         $this->addRequirement(
             function_exists('token_get_all'),
             'token_get_all() must be available',
             'Install and enable the <strong>Tokenizer</strong> extension.'
         );
 
         $this->addRequirement(
             function_exists('simplexml_import_dom'),
             'simplexml_import_dom() must be available',
             'Install and enable the <strong>SimpleXML</strong> extension.'
         );
 
         if (function_exists('apc_store') && ini_get('apc.enabled')) {
             if (version_compare($installedPhpVersion, '5.4.0', '>=')) {
                 $this->addRequirement(
                     version_compare(phpversion('apc'), '3.1.13', '>='),
                     'APC version must be at least 3.1.13 when using PHP 5.4',
                     'Upgrade your <strong>APC</strong> extension (3.1.13+).'
                 );
             } else {
                 $this->addRequirement(
                     version_compare(phpversion('apc'), '3.0.17', '>='),
                     'APC version must be at least 3.0.17',
                     'Upgrade your <strong>APC</strong> extension (3.0.17+).'
                 );
             }
         }
 
         $this->addPhpIniRequirement('detect_unicode', false);
 
         if (extension_loaded('suhosin')) {
             $this->addPhpIniRequirement(
                 'suhosin.executor.include.whitelist',
                 create_function('$cfgValue', 'return false !== stripos($cfgValue, "phar");'),
                 false,
                 'suhosin.executor.include.whitelist must be configured correctly in php.ini',
                 'Add "<strong>phar</strong>" to <strong>suhosin.executor.include.whitelist</strong> in php.ini<a href="#phpini">*</a>.'
             );
         }
 
         if (extension_loaded('xdebug')) {
             $this->addPhpIniRequirement(
                 'xdebug.show_exception_trace', false, true
             );
 
             $this->addPhpIniRequirement(
                 'xdebug.scream', false, true
             );
 
             $this->addPhpIniRecommendation(
                 'xdebug.max_nesting_level',
                 create_function('$cfgValue', 'return $cfgValue > 100;'),
                 true,
                 'xdebug.max_nesting_level should be above 100 in php.ini',
                 'Set "<strong>xdebug.max_nesting_level</strong>" to e.g. "<strong>250</strong>" in php.ini<a href="#phpini">*</a> to stop Xdebug\'s infinite recursion protection erroneously throwing a fatal error in your project.'
             );
         }
 
         $pcreVersion = defined('PCRE_VERSION') ? (float) PCRE_VERSION : null;
 
         $this->addRequirement(
             null !== $pcreVersion,
             'PCRE extension must be available',
             'Install the <strong>PCRE</strong> extension (version 8.0+).'
         );
 
         if (extension_loaded('mbstring')) {
             $this->addPhpIniRequirement(
                 'mbstring.func_overload',
                 create_function('$cfgValue', 'return (int) $cfgValue === 0;'),
                 true,
                 'string functions should not be overloaded',
                 'Set "<strong>mbstring.func_overload</strong>" to <strong>0</strong> in php.ini<a href="#phpini">*</a> to disable function overloading by the mbstring extension.'
             );
         }
 
         /* optional recommendations follow */
 
         if (file_exists(__DIR__.'/../vendor/composer')) {
             require_once __DIR__.'/../vendor/autoload.php';
 
             try {
                 $r = new \ReflectionClass('Sensio\Bundle\DistributionBundle\SensioDistributionBundle');
 
                 $contents = file_get_contents(dirname($r->getFileName()).'/Resources/skeleton/app/SymfonyRequirements.php');
             } catch (\ReflectionException $e) {
                 $contents = '';
             }
             $this->addRecommendation(
                 file_get_contents(__FILE__) === $contents,
                 'Requirements file should be up-to-date',
                 'Your requirements file is outdated. Run composer install and re-check your configuration.'
             );
         }
 
         $this->addRecommendation(
             version_compare($installedPhpVersion, '5.3.4', '>='),
             'You should use at least PHP 5.3.4 due to PHP bug #52083 in earlier versions',
             'Your project might malfunction randomly due to PHP bug #52083 ("Notice: Trying to get property of non-object"). Install PHP 5.3.4 or newer.'
         );
 
         $this->addRecommendation(
             version_compare($installedPhpVersion, '5.3.8', '>='),
             'When using annotations you should have at least PHP 5.3.8 due to PHP bug #55156',
             'Install PHP 5.3.8 or newer if your project uses annotations.'
         );
 
         $this->addRecommendation(
             version_compare($installedPhpVersion, '5.4.0', '!='),
             'You should not use PHP 5.4.0 due to the PHP bug #61453',
             'Your project might not work properly due to the PHP bug #61453 ("Cannot dump definitions which have method calls"). Install PHP 5.4.1 or newer.'
         );
 
         $this->addRecommendation(
             version_compare($installedPhpVersion, '5.4.11', '>='),
             'When using the logout handler from the Symfony Security Component, you should have at least PHP 5.4.11 due to PHP bug #63379 (as a workaround, you can also set invalidate_session to false in the security logout handler configuration)',
             'Install PHP 5.4.11 or newer if your project uses the logout handler from the Symfony Security Component.'
         );
 
         $this->addRecommendation(
             (version_compare($installedPhpVersion, '5.3.18', '>=') && version_compare($installedPhpVersion, '5.4.0', '<'))
             ||
             version_compare($installedPhpVersion, '5.4.8', '>='),
             'You should use PHP 5.3.18+ or PHP 5.4.8+ to always get nice error messages for fatal errors in the development environment due to PHP bug #61767/#60909',
             'Install PHP 5.3.18+ or PHP 5.4.8+ if you want nice error messages for all fatal errors in the development environment.'
         );
 
         if (null !== $pcreVersion) {
             $this->addRecommendation(
                 $pcreVersion >= 8.0,
                 sprintf('PCRE extension should be at least version 8.0 (%s installed)', $pcreVersion),
                 '<strong>PCRE 8.0+</strong> is preconfigured in PHP since 5.3.2 but you are using an outdated version of it. Symfony probably works anyway but it is recommended to upgrade your PCRE extension.'
             );
         }
 
         $this->addRecommendation(
             class_exists('DomDocument'),
             'PHP-DOM and PHP-XML modules should be installed',
             'Install and enable the <strong>PHP-DOM</strong> and the <strong>PHP-XML</strong> modules.'
         );
 
         $this->addRecommendation(
             function_exists('mb_strlen'),
             'mb_strlen() should be available',
             'Install and enable the <strong>mbstring</strong> extension.'
         );
 
         $this->addRecommendation(
             function_exists('iconv'),
             'iconv() should be available',
             'Install and enable the <strong>iconv</strong> extension.'
         );
 
         $this->addRecommendation(
             function_exists('utf8_decode'),
             'utf8_decode() should be available',
             'Install and enable the <strong>XML</strong> extension.'
         );
 
         $this->addRecommendation(
             function_exists('filter_var'),
             'filter_var() should be available',
             'Install and enable the <strong>filter</strong> extension.'
         );
 
         if (!defined('PHP_WINDOWS_VERSION_BUILD')) {
             $this->addRecommendation(
                 function_exists('posix_isatty'),
                 'posix_isatty() should be available',
                 'Install and enable the <strong>php_posix</strong> extension (used to colorize the CLI output).'
             );
         }
 
         $this->addRecommendation(
             class_exists('Locale'),
             'intl extension should be available',
             'Install and enable the <strong>intl</strong> extension (used for validators).'
         );
 
         if (extension_loaded('intl')) {
             // in some WAMP server installations, new Collator() returns null
             $this->addRecommendation(
                 null !== new Collator('fr_FR'),
                 'intl extension should be correctly configured',
                 'The intl extension does not behave properly. This problem is typical on PHP 5.3.X x64 WIN builds.'
             );
 
             // check for compatible ICU versions (only done when you have the intl extension)
             if (defined('INTL_ICU_VERSION')) {
                 $version = INTL_ICU_VERSION;
             } else {
                 $reflector = new ReflectionExtension('intl');
 
                 ob_start();
                 $reflector->info();
                 $output = strip_tags(ob_get_clean());
 
                 preg_match('/^ICU version +(?:=> )?(.*)$/m', $output, $matches);
                 $version = $matches[1];
             }
 
             $this->addRecommendation(
                 version_compare($version, '4.0', '>='),
                 'intl ICU version should be at least 4+',
                 'Upgrade your <strong>intl</strong> extension with a newer ICU version (4+).'
             );
 
             $this->addPhpIniRecommendation(
                 'intl.error_level',
                 create_function('$cfgValue', 'return (int) $cfgValue === 0;'),
                 true,
                 'intl.error_level should be 0 in php.ini',
                 'Set "<strong>intl.error_level</strong>" to "<strong>0</strong>" in php.ini<a href="#phpini">*</a> to inhibit the messages when an error occurs in ICU functions.'
             );
         }
 
         $accelerator =
             (extension_loaded('eaccelerator') && ini_get('eaccelerator.enable'))
             ||
             (extension_loaded('apc') && ini_get('apc.enabled'))
             ||
             (extension_loaded('Zend Optimizer+') && ini_get('zend_optimizerplus.enable'))
             ||
             (extension_loaded('Zend OPcache') && ini_get('opcache.enable'))
             ||
             (extension_loaded('xcache') && ini_get('xcache.cacher'))
             ||
             (extension_loaded('wincache') && ini_get('wincache.ocenabled'))
         ;
 
         $this->addRecommendation(
             $accelerator,
             'a PHP accelerator should be installed',
             'Install and/or enable a <strong>PHP accelerator</strong> (highly recommended).'
         );
 
         if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
             $this->addRecommendation(
                 $this->getRealpathCacheSize() > 1000,
                 'realpath_cache_size should be above 1024 in php.ini',
                 'Set "<strong>realpath_cache_size</strong>" to e.g. "<strong>1024</strong>" in php.ini<a href="#phpini">*</a> to improve performance on windows.'
             );
         }
 
         $this->addPhpIniRecommendation('short_open_tag', false);
 
         $this->addPhpIniRecommendation('magic_quotes_gpc', false, true);
 
         $this->addPhpIniRecommendation('register_globals', false, true);
 
         $this->addPhpIniRecommendation('session.auto_start', false);
 
         $this->addRecommendation(
             class_exists('PDO'),
             'PDO should be installed',
             'Install <strong>PDO</strong> (mandatory for Doctrine).'
         );
 
         if (class_exists('PDO')) {
             $drivers = PDO::getAvailableDrivers();
             $this->addRecommendation(
                 count($drivers) > 0,
                 sprintf('PDO should have some drivers installed (currently available: %s)', count($drivers) ? implode(', ', $drivers) : 'none'),
                 'Install <strong>PDO drivers</strong> (mandatory for Doctrine).'
             );
         }
     }
 
     /**
      * Loads realpath_cache_size from php.ini and converts it to int.
      *
      * (e.g. 16k is converted to 16384 int)
      *
      * @return int
      */
     protected function getRealpathCacheSize()
     {
         $size = ini_get('realpath_cache_size');
         $size = trim($size);
         $unit = strtolower(substr($size, -1, 1));
         switch ($unit) {
             case 'g':
                 return $size * 1024 * 1024 * 1024;
             case 'm':
                 return $size * 1024 * 1024;
             case 'k':
                 return $size * 1024;
             default:
                 return (int) $size;
         }
     }
 }