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   1  <?php
   2  /**
   3   *
   4   * This file is part of the phpBB Forum Software package.
   5   *
   6   * @copyright (c) phpBB Limited <https://www.phpbb.com>
   7   * @license GNU General Public License, version 2 (GPL-2.0)
   8   *
   9   * For full copyright and license information, please see
  10   * the docs/CREDITS.txt file.
  11   *
  12   */
  13  
  14  namespace phpbb\install\module\requirements\task;
  15  
  16  /**
  17   * Installer task that checks if the server meets phpBB requirements
  18   */
  19  class check_server_environment extends \phpbb\install\task_base
  20  {
  21      /**
  22       * @var \phpbb\install\helper\database
  23       */
  24      protected $database_helper;
  25  
  26      /**
  27       * @var \phpbb\install\helper\iohandler\iohandler_interface
  28       */
  29      protected $response_helper;
  30  
  31      /**
  32       * @var bool
  33       */
  34      protected $tests_passed;
  35  
  36      /**
  37       * Constructor
  38       *
  39       * @param    \phpbb\install\helper\database    $database_helper
  40       * @param    \phpbb\install\helper\iohandler\iohandler_interface    $response
  41       */
  42  	public function __construct(\phpbb\install\helper\database $database_helper,
  43                                  \phpbb\install\helper\iohandler\iohandler_interface $response)
  44      {
  45          $this->database_helper    = $database_helper;
  46          $this->response_helper    = $response;
  47          $this->tests_passed        = true;
  48  
  49          parent::__construct(true);
  50      }
  51  
  52      /**
  53       * {@inheritdoc}
  54       */
  55  	public function run()
  56      {
  57          //
  58          // Check requirements
  59          // The error messages should be set in the check_ functions
  60          //
  61  
  62          // Check PHP version
  63          $this->check_php_version();
  64  
  65          // Check for getimagesize()
  66          $this->check_image_size();
  67  
  68          // Check for PCRE support
  69          $this->check_pcre();
  70  
  71          // Check for JSON support
  72          $this->check_json();
  73  
  74          // Check for mbstring support
  75          $this->check_mbstring();
  76  
  77          // XML extension support check
  78          $this->check_xml();
  79  
  80          // Check for dbms support
  81          $this->check_available_dbms();
  82  
  83          return $this->tests_passed;
  84      }
  85  
  86      /**
  87       * Sets $this->tests_passed
  88       *
  89       * @param    bool    $is_passed
  90       */
  91  	protected function set_test_passed($is_passed)
  92      {
  93          // If one test failed, tests_passed should be false
  94          $this->tests_passed = (!$this->tests_passed) ? false : $is_passed;
  95      }
  96  
  97      /**
  98       * Check if the requirements for PHP version is met
  99       */
 100  	protected function check_php_version()
 101      {
 102          if (version_compare(PHP_VERSION, '7.2.0', '<'))
 103          {
 104              $this->response_helper->add_error_message('PHP_VERSION_REQD', 'PHP_VERSION_REQD_EXPLAIN');
 105  
 106              $this->set_test_passed(false);
 107              return;
 108          }
 109  
 110          $this->set_test_passed(true);
 111      }
 112  
 113      /**
 114       * Checks if the installed PHP has getimagesize() available
 115       */
 116  	protected function check_image_size()
 117      {
 118          if (!@function_exists('getimagesize'))
 119          {
 120              $this->response_helper->add_error_message('PHP_GETIMAGESIZE_SUPPORT', 'PHP_GETIMAGESIZE_SUPPORT_EXPLAIN');
 121  
 122              $this->set_test_passed(false);
 123              return;
 124          }
 125  
 126          $this->set_test_passed(true);
 127      }
 128  
 129      /**
 130       * Checks if the installed PHP supports PCRE
 131       */
 132  	protected function check_pcre()
 133      {
 134          if (@preg_match('//u', ''))
 135          {
 136              $this->set_test_passed(true);
 137              return;
 138          }
 139  
 140          $this->response_helper->add_error_message('PCRE_UTF_SUPPORT', 'PCRE_UTF_SUPPORT_EXPLAIN');
 141  
 142          $this->set_test_passed(false);
 143      }
 144  
 145      /**
 146       * Checks whether PHP's JSON extension is available or not
 147       */
 148  	protected function check_json()
 149      {
 150          if (@extension_loaded('json'))
 151          {
 152              $this->set_test_passed(true);
 153              return;
 154          }
 155  
 156          $this->response_helper->add_error_message('PHP_JSON_SUPPORT', 'PHP_JSON_SUPPORT_EXPLAIN');
 157  
 158          $this->set_test_passed(false);
 159      }
 160  
 161      /**
 162       * Checks whether PHP's mbstring extension is available or not
 163       */
 164  	protected function check_mbstring()
 165      {
 166          if (@extension_loaded('mbstring'))
 167          {
 168              $this->set_test_passed(true);
 169              return;
 170          }
 171  
 172          $this->response_helper->add_error_message('PHP_MBSTRING_SUPPORT', 'PHP_MBSTRING_SUPPORT_EXPLAIN');
 173  
 174          $this->set_test_passed(false);
 175      }
 176  
 177      /**
 178       * Checks whether or not the XML PHP extension is available (Required by the text formatter)
 179       */
 180  	protected function check_xml()
 181      {
 182          if (class_exists('DOMDocument'))
 183          {
 184              $this->set_test_passed(true);
 185              return;
 186          }
 187  
 188          $this->response_helper->add_error_message('PHP_XML_SUPPORT', 'PHP_XML_SUPPORT_EXPLAIN');
 189  
 190          $this->set_test_passed(false);
 191      }
 192  
 193      /**
 194       * Check if any supported DBMS is available
 195       */
 196  	protected function check_available_dbms()
 197      {
 198          $available_dbms = $this->database_helper->get_available_dbms(false, true);
 199  
 200          if ($available_dbms['ANY_DB_SUPPORT'])
 201          {
 202              $this->set_test_passed(true);
 203              return;
 204          }
 205  
 206          $this->response_helper->add_error_message('PHP_SUPPORTED_DB', 'PHP_SUPPORTED_DB_EXPLAIN');
 207  
 208          $this->set_test_passed(false);
 209      }
 210  
 211      /**
 212       * {@inheritdoc}
 213       */
 214  	static public function get_step_count()
 215      {
 216          return 0;
 217      }
 218  
 219      /**
 220       * {@inheritdoc}
 221       */
 222  	public function get_task_lang_name()
 223      {
 224          return '';
 225      }
 226  }