common.inc 19 KB
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<?php
// $Id$

function conf_init() {
  global $HTTP_HOST, $REQUEST_URI;

  /*
  ** Try finding a matching configuration file by stripping the website's
  ** URI from left to right.  If no configuration file is found, return a
  ** default value 'conf'.
  */

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  $file = strtolower(strtr($HTTP_HOST . substr($REQUEST_URI, 0, strrpos($REQUEST_URI, "/")), "/:", ".."));
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  while (strlen($file) > 4) {
    if (file_exists("includes/$file.php")) {
      return $file;
    }
    else {
      $file = substr($file, strpos($file, ".") + 1);
    }
  }

  return "conf";
}

function error_handler($errno, $message, $filename, $line, $variables) {
  $types = array(1 => "error", 2 => "warning", 4 => "parse error", 8 => "notice", 16 => "core error", 32 => "core warning", 64 => "compile error", 128 => "compile warning", 256 => "user error", 512 => "user warning", 1024 => "user notice");
  $entry = $types[$errno] .": $message in $filename on line $line.";
  if (($errno == 1 || $errno == 2 || $errno == 4) && error_reporting()) {
    watchdog("error", $types[$errno] .": $message in $filename on line $line.");
    print $entry;
  }
}

function watchdog($type, $message) {
  global $user;
  db_query("INSERT INTO watchdog (uid, type, message, location, hostname, timestamp) VALUES ('$user->uid', '". check_input($type) ."', '". check_input($message) ."', '". check_input(getenv("REQUEST_URI")) ."', '". check_input(getenv("REMOTE_ADDR")) ."', '". time() ."')");
}

function throttle($type, $rate) {
  if (!user_access("access administration pages")) {
    if ($throttle = db_fetch_object(db_query("SELECT * FROM watchdog WHERE type = '$type' AND hostname = '". getenv("REMOTE_ADDR") ."' AND ". time() ." - timestamp < $rate"))) {
      watchdog("warning", "throttle: '". getenv("REMOTE_ADDR") ."' exceeded submission rate - $throttle->type");
      die(message_throttle());
    }
    else {
      watchdog($type, "throttle");
    }
  }
}

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function array2object($node) {

  if (is_array($node)) {
    foreach ($node as $key => $value) {
      $object->$key = $value;
    }
  }
  else {
    $object = $node;
  }

  return $object;
}

function object2array($node) {

  if (is_object($node)) {
    foreach ($node as $key => $value) {
      $array[$key] = $value;
    }
  }
  else {
    $array = $node;
  }

  return $array;
}

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function path_uri() {
  global $HTTP_HOST, $REQUEST_URI;
  return "http://". $HTTP_HOST . substr($REQUEST_URI, 0, strrpos($REQUEST_URI, "/")) ."/";
}

function path_img() {
  // use "http://your-image-server.com/ if you want to host images on a seperate server.
  return "./images/";
}

function message_access() {
  return t("You are not authorized to access to this page.");
}

function message_na() {
  return t("n/a");
}

function message_throttle() {
  return t("You exceeded the maximum submission rate.  Please wait a few minutes and try again.");
}

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function locale_init() {
  global $languages, $user;
  return ($languages ? (($user->uid && $user->language) ? $user->language : key($languages)) : 0);
}

function t($string) {
  global $languages;
  return ($languages && function_exists("locale") ? locale($string) : $string);
}

function variable_init($conf = array()) {
  $result = db_query("SELECT * FROM variable");
  while ($variable = db_fetch_object($result)) {
    if (!isset($conf[$variable->name])) {
      $conf[$variable->name] = $variable->value;
    }
  }

  return $conf;
}

function variable_get($name, $default, $object = 0) {
  global $conf;

  return isset($conf[$name]) ? $conf[$name] : $default;
}

function variable_set($name, $value) {
  global $conf;

  db_query("DELETE FROM variable WHERE name = '". check_query($name) ."'");
  db_query("INSERT INTO variable (name, value) VALUES ('". check_query($name) ."', '". check_query($value) ."')");

  $conf[$name] = $value;
}

function variable_del($name) {
  global $conf;

  db_query("DELETE FROM variable WHERE name = '". check_query($name) ."'");

  unset($conf[$name]);
}

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/**
 * Format a single result entry of a search query:
 *
 * @param $item  a single search result as returned by <module>_search of type
 *               array("count" => ..., "link" => ..., "title" => ..., 
 *               "user" => ..., "date" => ..., "keywords" => ...)
 * @param $type  module type of this item
 */
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function search_item($item, $type) {
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  $output .= " <b>". $item["count"] . "&nbsp;&nbsp;<u><a href=\"". $item["link"] . "\">". $item["title"] ."</a></u></b><br />";
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  $output .= " <small>$type ". ($item["user"] ? " - ". $item["user"] : "") ."". ($item["date"] ? " - ". format_date($item["date"], "small") : "") ."</small>";
  $output .= "<br /><br />";

  return $output;
}

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/**
 * Render a generic search form.
 *
 * "Generic" means "universal usable" - that is, usable not only from
 * module.php?mod=search, but also as a simple seach box (without 
 * "Restrict search to", help text, etc) from theme's header etc. 
 * This means: provide options to only conditionally render certain 
 * parts of this form.
 *
 * @param $action  Form action. Defaults to module.php?mod=search.
 * @param $query   Query string. Defaults to global $keys.
 * @param $options != 0: Render additional form fields/text 
 *                 ("Restrict search to", help text, etc).
 */
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function search_form($action = 0, $query = 0, $options = 0) {
  global $keys;

  if (!$action) {
    $action = "module.php?mod=search";
  }

  if (!$query) {
    $query = $keys;
  }

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  $output .= " <br /><input type=\"text\" size=\"50\" value=\"". check_form($keys) ."\" name=\"keys\" />";
  $output .= " <input type=\"submit\" value=\"". t("Search") ."\" />\n";
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  if ($options != 0) {
    $output .= "<br />";
    $output .= t("Restrict search to") .": ";

    foreach (module_list() as $name) {
      if (module_hook($name, "search")) {
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        $output .= " <input type=\"checkbox\" name=\"edit[type][$name]\" ". ($edit["type"][$name] ? " checked=\"checked\"" : "") ." /> ". t($name);
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      }
    }
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    // TODO: (link to) search hints
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  }

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  $form .= "<br />";

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  return form($output, "post", $action);
}

/*
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 * Collect the search results:
 */
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function search_data() {
  global $keys, $edit;

  $keys = check_input($keys);

  if ($keys) {
    foreach (module_list() as $name) {
      if (module_hook($name, "search") && (!$edit["type"] || $edit["type"][$name]) && ($result = module_invoke($name, "search", check_query($keys)))) {
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        if ($name == "node" || $name == "comment") {
          $output .= "<b>Matching ". $name ."s ranked in order of relevance</b><br />";
        }
        else {
          $output .= "<b>Matching ". $name ."s</b><br />";
        }
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        foreach ($result as $entry) {
          $output .= search_item($entry, $name);
        }
      }
    }
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    if (!$output) {
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      $output .= t("Your search yielded no results.");
    }
  }

  return $output;
}

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/**
 * Display the search form and the resulting data.
 *
 * @param $type    If set, search only nodes of this type. 
 *                 Otherwise, search all types.
 * @param $action  Form action. Defaults to module.php?mod=search.
 * @param $query   Query string. Defaults to global $keys.
 * @param $options != 0: Render additional form fields/text 
 *                 ("Restrict search to", help text, etc).
 */
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function search_type($type = 0, $action = 0, $query = 0, $options = 0) {
  global $edit;

  if ($type) {
    $edit["type"][$type] = "on";
  }

  return search_form($action, $query, $options) . search_data();
}

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function drupal_goto($url) {

  /*
  ** It is advised to use "drupal_goto()" instead of PHP's "header()" as
  ** "drupal_goto()" will append the user's session ID to the URI when PHP
  ** is compiled with "--enable-trans-sid".
  */

  if (SID == "" || strstr($url, SID)) {
    header("Location: $url");
  }
  else if (strstr($url, "?") && !strstr($url, SID)) {
    header("Location: $url&". SID);
  }
  else {
    header("Location: $url?". SID);
  }

  /*
  ** The "Location" header sends a REDIRECT status code to the http
  ** deamon.  In some cases this can go wrong, so we make sure none
  ** of the code /below/ gets executed when we redirect.
  */

  exit();
}

/*
** Stores the referer in a persistent variable:
*/

function referer_save() {
  global $referer, $HTTP_REFERER, $REQUEST_URI;

  if (!strstr($HTTP_REFERER, $REQUEST_URI)) {
    $referer = $HTTP_REFERER;
    session_register("referer");
  }
}

/*
** Restores the referer from a persistent variable:
*/

function referer_load() {
  global $referer;

  if (session_is_registered("referer")) {
    return $referer;
  }
  else {
    return 0;
  }
}

function check_form($text) {
  return htmlspecialchars(stripslashes($text));
}

function check_export($text) {
  return htmlspecialchars(stripslashes($text));
}

function check_code($text) {
  return $text;
}

function check_preview($text) {
  return check_output(check_input($text));
}

function check_query($text) {
  return addslashes(stripslashes($text));
}

function filter($text) {
  foreach (module_list() as $name) {
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    if (module_hook($name, "filter")) {
      $text = module_invoke($name, "filter", $text);
    }
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  }

  return $text;
}

function check_input($text) {
  return check_query($text);
}

function check_output($text, $nl2br = 0) {
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  return ($text) ? ($nl2br ? str_replace("\r", "", str_replace("\n", "<br />", stripslashes($text))) : stripslashes($text)) : message_na();
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}

function check_file($filename) {
  if (is_uploaded_file($filename)) {
    return 1;
  }
  else {
    return 0;
  }
}

function format_info($body, $block) {
  return "<table><tr><td><table align=\"right\" border=\"1\" width=\"180\"><tr><td>$block</td></tr></table>$body</td></tr></table>\n";
}

function format_rss_channel($title, $link, $description, $items, $language = "en") {
  $output .= "<channel>\n";
  $output .= " <title>". htmlentities(strip_tags($title)) ."</title>\n";
  $output .= " <link>". htmlentities(strip_tags($link)) ."</link>\n";
  $output .= " <description>". htmlentities($description) ."</description>\n";
  $output .= " <language>". htmlentities(strip_tags($language)) ."</language>\n";
  $output .= $items;
  $output .= "</channel>\n";

  return $output;
}

function format_rss_item($title, $link, $description) {
  $output .= "<item>\n";
  $output .= " <title>". htmlentities(strip_tags($title)) ."</title>\n";
  $output .= " <link>". htmlentities(strip_tags($link)) ."</link>\n";
  $output .= " <description>". htmlentities($description) ."</description>\n";
  $output .= "</item>\n";

  return $output;
}

function format_plural($count, $singular, $plural) {
  return ($count == 1) ? "$count ". t($singular) : "$count ". t($plural);
}

function format_size($size) {
  $suffix = "bytes";
  if ($size > 1024) {
    $size = round($size / 1024, 2);
    $suffix = "KB";
  }
  if ($size > 1024) {
    $size = round($size / 1024, 2);
    $suffix = "MB";
  }
  return "$size $suffix";
}

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function cache_get($key) {
  $cache = db_fetch_object(db_query("SELECT data FROM cache WHERE cid = '". check_query($key) ."'"));
  return $cache->data ? $cache->data : 0;
}

function cache_set($cid, $data, $expire = 0) {
  if (db_fetch_object(db_query("SELECT cid FROM cache WHERE cid = '". check_query($cid) ."'"))) {
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    db_query("UPDATE cache SET data = '". check_query($data) ."' WHERE cid = '". check_query($cid) ."'");
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  }
  else {
    db_query("INSERT INTO cache (cid, data, expire) VALUES('". check_query($cid) ."', '". check_query($data) ."', '". check_query($expire) ."')");
  }
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}

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function cache_del($cid) {
  db_query("DELETE FROM cache WHERE cid = '". check_query($cid) ."'");
}

function cache_clear() {
  db_query("DELETE FROM cache WHERE expire < ". time() ." AND expire > 0");
}

function page_set_cache() {
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  global $user, $REQUEST_URI, $REQUEST_METHOD;

  if (!$user->uid && $REQUEST_METHOD == "GET") {
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    if ($data = ob_get_contents()) {
      cache_set($REQUEST_URI, $data, (time() + variable_get("cache_clear", 30)));
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    }
  }
}

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function page_get_cache() {
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  global $user, $REQUEST_URI, $REQUEST_METHOD;

  if (!$user->uid && $REQUEST_METHOD == "GET") {
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    if ($cache = cache_get($REQUEST_URI)) {
      cache_clear();
    }
    else {
      ob_start();
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    }
  }
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  return $cache ? $cache : 0;
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}

function format_interval($timestamp) {
  $units = array("year|years" => 31536000, "week|weeks" => 604800, "day|days" => 86400, "hour|hours" => 3600, "min|min" => 60, "sec|sec" => 1);
  foreach ($units as $key=>$value) {
    $key = explode("|", $key);
    if ($timestamp >= $value) {
      $output .= ($output ? " " : "") . format_plural(floor($timestamp / $value), $key[0], $key[1]);
      $timestamp %= $value;
    }
  }
  return ($output) ? $output : "0 sec";
}

function format_date($timestamp, $type = "medium", $format = "") {
  global $user;

  // $timestamp += ($user->timezone) ? $user->timezone - date("Z") : 0;

  switch ($type) {
    case "small":
      $date = date("m/d/y - H:i", $timestamp);
      break;
    case "medium":
      $date = t(date("l", $timestamp)) .", ". date("m/d/Y - H:i", $timestamp);
      break;
    case "large":
      $date = t(date("l", $timestamp)) .", ". t(date("F", $timestamp)) ." ". date("d, Y - H:i", $timestamp);
      break;
    case "custom":
      for ($i = strlen($format); $i >= 0; $c = $format[--$i]) {
        if (strstr("DFlMSw", $c)) {
          $date = t(date($c, $timestamp)).$date;
        }
        else if (strstr("AaBdgGhHiIjLmnrstTUYyZz", $c)) {
          $date = date($c, $timestamp).$date;
        }
        else {
          $date = $c.$date;
        }
      }
      break;
    default:
      $date = t(date("l", $timestamp)) .", ". date("m/d/Y - H:i", $timestamp);
  }
  return $date;
}

function format_name($object) {
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  global $PHP_SELF;
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  if ($object->uid && $object->name) {
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    if (strstr($PHP_SELF, "admin.php")) {
      $output = "<a href=\"admin.php?mod=user&op=edit&id=$object->uid\">$object->name</a>";
    }
    else {
      $output = "<a href=\"module.php?mod=user&op=view&id=$object->uid\">$object->name</a>";
    }
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  }
  else {
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    $output = variable_get(anonymous, "Anonymous");
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  }

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  return $output;
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}

function format_email($address) {
  return ($address) ? "<a href=\"mailto:$address\">$address</A>" : message_na();
}

function format_url($address, $description = 0) {
  $description = ($description) ? $description : $address;
  return ($address) ? "<a href=\"$address\">". check_output($description) ."</a>" : message_na();
}

function format_tag($link, $text) {
  return "'<a href=\"node.php?title='. urlencode('$link') .'\">'. ('$text' ? '$text' : '$link') .'</a>'";
}

function form($form, $method = "post", $action = 0, $options = 0) {
  global $REQUEST_URI;

  return "<form action=\"". ($action ? $action : $REQUEST_URI) ."\" method=\"$method\"". ($options ? " $options" : "") .">\n$form</form>\n";
}

function form_item($title, $value, $description = 0) {
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  return "<p>". ($title ? "<b>$title:</b><br />" : "") . $value . ($description ? "<br /><small><i>$description</i></small>" : "") ."</p>\n";
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}

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function form_checkbox($title, $name, $value = 1, $checked = 0, $description = 0) {
  return form_item(0, "<input type=\"checkbox\" name=\"edit[$name]\" value=\"". $value ."\"". ($checked ? " checked=\"checked\"" : "") ." /> $title", $description);
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}

function form_textfield($title, $name, $value, $size, $maxlength, $description = 0) {
  return form_item($title, "<input maxlength=\"$maxlength\" name=\"edit[$name]\" size=\"$size\" value=\"". check_form($value) ."\" />", $description);
}

function form_password($title, $name, $value, $size, $maxlength, $description = 0) {
  return form_item($title, "<input type=\"password\" maxlength=\"$maxlength\" name=\"edit[$name]\" size=\"$size\" value=\"". check_form($value) ."\" />", $description);
}

function form_textarea($title, $name, $value, $cols, $rows, $description = 0) {
  return form_item($title, "<textarea wrap=\"virtual\" cols=\"$cols\" rows=\"$rows\" name=\"edit[$name]\">". check_form($value) ."</textarea>", $description);
}

function form_select($title, $name, $value, $options, $description = 0, $extra = 0) {
  if (count($options) > 0) {
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    foreach ($options as $key => $choice) {
      $select .= "<option value=\"$key\"". (is_array($value) ? (in_array($key, $value) ? " selected=\"selected\"" : "") : ($key == $value ? " selected=\"selected\"" : "")) .">". check_form($choice) ."</option>";
    }
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    return form_item($title, "<select name=\"edit[$name]\"". ($extra ? " $extra" : "") .">$select</select>", $description);
  }
}

function form_file($title, $name, $size, $description = 0) {
  return form_item($title, "<input type=\"file\" name=\"edit[$name]\" size=\"$size\" />\n", $description);
}

function form_hidden($name, $value) {
  return "<input type=\"hidden\" name=\"edit[$name]\" value=\"". check_form($value) ."\" />\n";
}

function form_submit($value) {
  return "<input type=\"submit\" name=\"op\" value=\"". check_form($value) ."\" />\n";
}

function field_get($string, $name) {
  ereg(",$name=([^,]+)", ",$string", $regs);
  return $regs[1];
}

function field_set($string, $name, $value) {
  $rval = ereg_replace(",$name=[^,]+", "", ",$string");
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  if ($value) {
    $rval .= ($rval == "," ? "" : ",") ."$name=$value";
  }
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  return substr($rval, 1);
}

function field_merge($a, $b) {
  foreach (explode(",", $b) as $data) {
    $entry = explode("=", $data);
    $a = field_set($a, $entry[0], $entry[1]);
  }
  return $a;
}

function link_page() {
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  global $custom_links;
  
  if (is_array($custom_links)) {
    return $custom_links;
  }
  else {
    $links[] = "<a href=\"index.php\">". t("home") ."</a>";
    foreach (module_list() as $name) {    
      if (module_hook($name, "link")) {
        $links = array_merge($links, module_invoke($name, "link", "page"));
      }  
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    }
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    return $links;
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  }
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}  
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function link_node($node, $main = 0) {
  foreach (module_list() as $name) {
    if (module_hook($name, "link")) {
      $links = array_merge($links, module_invoke($name, "link", "node", $node, $main));
    }
  }

  return $links ? $links : array();
}

function timer_start() {
  global $timer;
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  list($usec, $sec) = explode(" ", microtime());
  $timer = (float)$usec + (float)$sec;
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}

function timer_print() {
  global $timer;
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  list($usec, $sec) = explode(" ", microtime());
  $stop = (float)$usec + (float)$sec;
  $diff = $stop - $timer;
  print "<pre>execution time: $diff sec</pre>";
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}

function query_print() {
  global $queries;
  print "<pre>";
  print_r($queries);
  print "</pre>";
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}

function page_header() {
  if (variable_get("dev_timer", 0)) {
    timer_start();
  }

  if (variable_get("cache", 0)) {
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    if ($data = page_get_cache()) {
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      print $data;
      exit();
    }
  }
}

function page_footer() {
  if (variable_get("dev_timer", 0)) {
    timer_print();
  }

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  if (variable_get("dev_query", 0)) {
    query_print();
  }

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  if (variable_get("cache", 0)) {
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    page_set_cache();
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  }
}

$config = conf_init();

unset($conf);
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include_once "includes/$config.php";
include_once "includes/database.inc";
include_once "includes/xmlrpc.inc";
include_once "includes/module.inc";
include_once "includes/theme.inc";

// initialize configuration variables:
$conf = variable_init($conf);

// initialize installed modules:
module_init();

// initialize localization system:
$locale = locale_init();

// initialize theme:
$theme = theme_init();

// set error handler:
set_error_handler("error_handler");

?>