Update

Author: steevanb

app/SymfonyRequirements.php

@@ -168,6 +168,9 @@ public function __construct($cfgName, $evaluation, $approveCfgAbsence = false, $
  */
 class RequirementCollection implements IteratorAggregate
 {
+    /**
+     * @var Requirement[]
+     */
     private $requirements = array();
 
     /**
@@ -265,7 +268,7 @@ public function addCollection(RequirementCollection $collection)
     /**
      * Returns both requirements and recommendations.
      *
-     * @return array Array of Requirement instances
+     * @return Requirement[]
      */
     public function all()
     {
@@ -275,7 +278,7 @@ public function all()
     /**
      * Returns all mandatory requirements.
      *
-     * @return array Array of Requirement instances
+     * @return Requirement[]
      */
     public function getRequirements()
     {
@@ -292,7 +295,7 @@ public function getRequirements()
     /**
      * Returns the mandatory requirements that were not met.
      *
-     * @return array Array of Requirement instances
+     * @return Requirement[]
      */
     public function getFailedRequirements()
     {
@@ -309,7 +312,7 @@ public function getFailedRequirements()
     /**
      * Returns all optional recommendations.
      *
-     * @return array Array of Requirement instances
+     * @return Requirement[]
      */
     public function getRecommendations()
     {
@@ -326,7 +329,7 @@ public function getRecommendations()
     /**
      * Returns the recommendations that were not met.
      *
-     * @return array Array of Requirement instances
+     * @return Requirement[]
      */
     public function getFailedRecommendations()
     {
@@ -376,7 +379,8 @@ public function getPhpIniConfigPath()
  */
 class SymfonyRequirements extends RequirementCollection
 {
-    const REQUIRED_PHP_VERSION = '5.3.3';
+    const LEGACY_REQUIRED_PHP_VERSION = '5.3.3';
+    const REQUIRED_PHP_VERSION = '5.5.9';
 
     /**
      * Constructor that initializes the requirements.
@@ -386,16 +390,26 @@ public function __construct()
         /* mandatory requirements follow */
 
         $installedPhpVersion = phpversion();
+        $requiredPhpVersion = $this->getPhpRequiredVersion();
 
-        $this->addRequirement(
-            version_compare($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->addRecommendation(
+            $requiredPhpVersion,
+            'Vendors should be installed in order to check all requirements.',
+            'Run the <code>composer install</code> command.',
+            'Run the "composer install" command.'
         );
 
+        if (false !== $requiredPhpVersion) {
+            $this->addRequirement(
+                version_compare($installedPhpVersion, $requiredPhpVersion, '>='),
+                sprintf('PHP version must be at least %s (%s installed)', $requiredPhpVersion, $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, $requiredPhpVersion),
+                sprintf('Install PHP %s or newer (installed version is %s)', $requiredPhpVersion, $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',
@@ -431,7 +445,7 @@ public function __construct()
             '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, '>=')) {
+        if (false !== $requiredPhpVersion && version_compare($installedPhpVersion, $requiredPhpVersion, '>=')) {
             $timezones = array();
             foreach (DateTimeZone::listAbbreviations() as $abbreviations) {
                 foreach ($abbreviations as $abbreviation) {
@@ -446,6 +460,12 @@ public function __construct()
             );
         }
 
+        $this->addRequirement(
+            function_exists('iconv'),
+            'iconv() must be available',
+            'Install and enable the <strong>iconv</strong> extension.'
+        );
+
         $this->addRequirement(
             function_exists('json_encode'),
             'json_encode() must be available',
@@ -546,10 +566,10 @@ function_exists('simplexml_import_dom'),
             require_once __DIR__.'/../vendor/autoload.php';
 
             try {
-                $r = new \ReflectionClass('Sensio\Bundle\DistributionBundle\SensioDistributionBundle');
+                $r = new ReflectionClass('Sensio\Bundle\DistributionBundle\SensioDistributionBundle');
 
                 $contents = file_get_contents(dirname($r->getFileName()).'/Resources/skeleton/app/SymfonyRequirements.php');
-            } catch (\ReflectionException $e) {
+            } catch (ReflectionException $e) {
                 $contents = '';
             }
             $this->addRecommendation(
@@ -702,9 +722,9 @@ function_exists('posix_isatty'),
 
         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->getRealpathCacheSize() >= 5 * 1024 * 1024,
+                'realpath_cache_size should be at least 5M in php.ini',
+                'Setting "<strong>realpath_cache_size</strong>" to e.g. "<strong>5242880</strong>" or "<strong>5M</strong>" in php.ini<a href="#phpini">*</a> may improve performance on Windows significantly in some cases.'
             );
         }
 
@@ -743,7 +763,11 @@ protected function getRealpathCacheSize()
     {
         $size = ini_get('realpath_cache_size');
         $size = trim($size);
-        $unit = strtolower(substr($size, -1, 1));
+        $unit = '';
+        if (!ctype_digit($size)) {
+            $unit = strtolower(substr($size, -1, 1));
+            $size = (int) substr($size, 0, -1);
+        }
         switch ($unit) {
             case 'g':
                 return $size * 1024 * 1024 * 1024;
@@ -755,4 +779,28 @@ protected function getRealpathCacheSize()
                 return (int) $size;
         }
     }
+
+    /**
+     * Defines PHP required version from Symfony version.
+     *
+     * @return string|false The PHP required version or false if it could not be guessed
+     */
+    protected function getPhpRequiredVersion()
+    {
+        if (!file_exists($path = __DIR__.'/../composer.lock')) {
+            return false;
+        }
+
+        $composerLock = json_decode(file_get_contents($path), true);
+        foreach ($composerLock['packages'] as $package) {
+            $name = $package['name'];
+            if ('symfony/symfony' !== $name && 'symfony/http-kernel' !== $name) {
+                continue;
+            }
+
+            return (int) $package['version'][1] > 2 ? self::REQUIRED_PHP_VERSION : self::LEGACY_REQUIRED_PHP_VERSION;
+        }
+
+        return false;
+    }
 }

app/check.php

@@ -6,13 +6,13 @@
 $symfonyRequirements = new SymfonyRequirements();
 $iniPath = $symfonyRequirements->getPhpIniConfigPath();
 
-echo_title('Symfony2 Requirements Checker');
+echo_title('Symfony Requirements Checker');
 
 echo '> PHP is using the following php.ini file:'.PHP_EOL;
 if ($iniPath) {
     echo_style('green', '  '.$iniPath);
 } else {
-    echo_style('warning', '  WARNING: No configuration file (php.ini) used by PHP!');
+    echo_style('yellow', '  WARNING: No configuration file (php.ini) used by PHP!');
 }
 
 echo PHP_EOL.PHP_EOL;
@@ -21,7 +21,6 @@
 
 $messages = array();
 foreach ($symfonyRequirements->getRequirements() as $req) {
-    /** @var $req Requirement */
     if ($helpText = get_error_message($req, $lineSize)) {
         echo_style('red', 'E');
         $messages['error'][] = $helpText;
@@ -42,9 +41,9 @@
 }
 
 if ($checkPassed) {
-    echo_block('success', 'OK', 'Your system is ready to run Symfony2 projects');
+    echo_block('success', 'OK', 'Your system is ready to run Symfony projects');
 } else {
-    echo_block('error', 'ERROR', 'Your system is not ready to run Symfony2 projects');
+    echo_block('error', 'ERROR', 'Your system is not ready to run Symfony projects');
 
     echo_title('Fix the following mandatory requirements', 'red');