comparison app/SymfonyRequirements.php @ 0:493bcb69166c

added public content

+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[e-mail]>
+ *
+ * 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 <[e-mail]>
+ */
+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 */
+
+        $this->addRecommendation(
+            file_get_contents(__FILE__) === file_get_contents(__DIR__.'/../vendor/sensio/distribution-bundle/Sensio/Bundle/DistributionBundle/Resources/skeleton/app/SymfonyRequirements.php'),
+            '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 (class_exists('Collator')) {
+            $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.'
+            );
+        }
+
+        if (class_exists('Locale')) {
+            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+).'
+            );
+        }
+
+        $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;
+        }
+    }
+}