includes/functions.inc.php

<?php

// $Id: functions.inc.php,v 1.24 2008/07/01 01:16:11 asmecher Exp $


function import($class) {
   require_once(str_replace('.', '/', $class) . '.inc.php');
}

function pageRequiresInstall() {
   $page = Request::getRequestedPage();
   return ($page != 'install' && $page != 'help');
}

function initSystem() {
   $microTime = Core::microtime();

   Registry::set('system.debug.startTime', $microTime);
   $notes = array();
   Registry::set('system.debug.notes', $notes);

   if (Config::getVar('general', 'installed')) {
      // Initialize database connection
      $conn = &DBConnection::getInstance();

      if (!$conn->isConnected()) {
         if (Config::getVar('database', 'debug')) {
            $dbconn = &$conn->getDBConn();
            fatalError('Database connection failed: ' . $dbconn->errorMsg());

         } else {
            fatalError('Database connection failed!');
         }
      }
   }
}

if (!function_exists('file_get_contents')) {
   // For PHP < 4.3.0
   function file_get_contents($file) {
      return join('', file($file));
   }
}

function fatalError($reason) {
   // Because this method may be called when checking the value of the show_stacktrace
   // configuration string, we need to ensure that we don't get stuck in an infinite loop.
   static $isErrorCondition = null;
   static $showStackTrace = false;

   if ($isErrorCondition === null) {
      $isErrorCondition = true;
      $showStackTrace = Config::getVar('debug', 'show_stacktrace');
      $isErrorCondition = false;
   }

   echo "<h1>$reason</h1>";

   if ($showStackTrace && checkPhpVersion('4.3.0')) {
      echo "<h4>Stack Trace:</h4>\n";
      $trace = debug_backtrace();

      // Remove the call to fatalError from the call trace.
      array_shift($trace);

      // Back-trace pretty-printer adapted from the following URL:
      // http://ca3.php.net/manual/en/function.debug-backtrace.php
      // Thanks to diz at ysagoon dot com

      // FIXME: Is there any way to localize this when the localization
      // functions may have caused the failure in the first place?
      foreach ($trace as $bt) {
         $args = '';
         if (isset($bt['args'])) foreach ($bt['args'] as $a) {
            if (!empty($args)) {
               $args .= ', ';
            }
            switch (gettype($a)) {
               case 'integer':
               case 'double':
                  $args .= $a;
                  break;
               case 'string':
                  $a = htmlspecialchars(substr($a, 0, 64)).((strlen($a) > 64) ? '...' : '');
                  $args .= "\"$a\"";
                  break;
               case 'array':
                  $args .= 'Array('.count($a).')';
                  break;
               case 'object':
                  $args .= 'Object('.get_class($a).')';
                  break;
               case 'resource':
                  $args .= 'Resource('.strstr($a, '#').')';
                  break;
               case 'boolean':
                  $args .= $a ? 'True' : 'False';
                  break;
               case 'NULL':
                  $args .= 'Null';
                  break;
               default:
                  $args .= 'Unknown';
            }
         }
         $class = isset($bt['class'])?$bt['class']:'';
         $type = isset($bt['type'])?$bt['type']:'';
         $function = isset($bt['function'])?$bt['function']:'';
         $file = isset($bt['file'])?$bt['file']:'(unknown)';
         $line = isset($bt['line'])?$bt['line']:'(unknown)';

         echo "<strong>File:</strong> {$file} line {$line}<br />\n";
         echo "<strong>Function:</strong> {$class}{$type}{$function}($args)<br />\n";
         echo "<br/>\n";
      }
   }

   error_log("OJS: $reason");
   die();
}

function checkPhpVersion($version) {
   return (version_compare(PHP_VERSION, $version) !== -1);
}

?>

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