input[$variable])) { $var = $CONFIG->input[$variable]; if ($filter_result) { $var = filter_tags($var); } return $var; } if (isset($_REQUEST[$variable])) { if (is_array($_REQUEST[$variable])) { $var = $_REQUEST[$variable]; } else { $var = trim($_REQUEST[$variable]); } if ($filter_result) { $var = filter_tags($var); } return $var; } return $default; } /** * Sets an input value that may later be retrieved by get_input * * Note: this function does not handle nested arrays (ex: form input of param[m][n]) * * @param string $variable The name of the variable * @param string $value The value of the variable * * @return void */ function set_input($variable, $value) { global $CONFIG; if (!isset($CONFIG->input)) { $CONFIG->input = array(); } if (is_array($value)) { array_walk_recursive($value, create_function('&$v, $k', '$v = trim($v);')); $CONFIG->input[trim($variable)] = $value; } else { $CONFIG->input[trim($variable)] = trim($value); } } /** * Filter tags from a given string based on registered hooks. * * @param mixed $var Anything that does not include an object (strings, ints, arrays) * This includes multi-dimensional arrays. * * @return mixed The filtered result - everything will be strings */ function filter_tags($var) { return elgg_trigger_plugin_hook('validate', 'input', null, $var); } /** * Validates an email address. * * @param string $address Email address. * * @return bool */ function is_email_address($address) { return filter_var($address, FILTER_VALIDATE_EMAIL) === $address; } /** * Load all the REQUEST variables into the sticky form cache * * Call this from an action when you want all your submitted variables * available if the submission fails validation and is sent back to the form * * @param string $form_name Name of the sticky form * * @return void * @link http://docs.elgg.org/Tutorials/UI/StickyForms * @since 1.8.0 */ function elgg_make_sticky_form($form_name) { elgg_clear_sticky_form($form_name); if (!isset($_SESSION['sticky_forms'])) { $_SESSION['sticky_forms'] = array(); } $_SESSION['sticky_forms'][$form_name] = array(); foreach ($_REQUEST as $key => $var) { // will go through XSS filtering on the get function $_SESSION['sticky_forms'][$form_name][$key] = $var; } } /** * Clear the sticky form cache * * Call this if validation is successful in the action handler or * when they sticky values have been used to repopulate the form * after a validation error. * * @param string $form_name Form namespace * * @return void * @link http://docs.elgg.org/Tutorials/UI/StickyForms * @since 1.8.0 */ function elgg_clear_sticky_form($form_name) { unset($_SESSION['sticky_forms'][$form_name]); } /** * Has this form been made sticky? * * @param string $form_name Form namespace * * @return boolean * @link http://docs.elgg.org/Tutorials/UI/StickyForms * @since 1.8.0 */ function elgg_is_sticky_form($form_name) { return isset($_SESSION['sticky_forms'][$form_name]); } /** * Get a specific sticky variable * * @param string $form_name The name of the form * @param string $variable The name of the variable * @param mixed $default Default value if the variable does not exist in sticky cache * @param boolean $filter_result Filter for bad input if true * * @return mixed * * @todo should this filter the default value? * @link http://docs.elgg.org/Tutorials/UI/StickyForms * @since 1.8.0 */ function elgg_get_sticky_value($form_name, $variable = '', $default = NULL, $filter_result = true) { if (isset($_SESSION['sticky_forms'][$form_name][$variable])) { $value = $_SESSION['sticky_forms'][$form_name][$variable]; if ($filter_result) { // XSS filter result $value = filter_tags($value); } return $value; } return $default; } /** * Get all the values in a sticky form in an array * * @param string $form_name The name of the form * @param bool $filter_result Filter for bad input if true * * @return array * @since 1.8.0 */ function elgg_get_sticky_values($form_name, $filter_result = true) { if (!isset($_SESSION['sticky_forms'][$form_name])) { return array(); } $values = $_SESSION['sticky_forms'][$form_name]; if ($filter_result) { foreach ($values as $key => $value) { // XSS filter result $values[$key] = filter_tags($value); } } return $values; } /** * Clear a specific sticky variable * * @param string $form_name The name of the form * @param string $variable The name of the variable to clear * * @return void * @link http://docs.elgg.org/Tutorials/UI/StickyForms * @since 1.8.0 */ function elgg_clear_sticky_value($form_name, $variable) { unset($_SESSION['sticky_forms'][$form_name][$variable]); } /** * Page handler for autocomplete endpoint. * * /livesearch?q= * * Other options include: * match_on string all or array(groups|users|friends) * match_owner int 0/1 * limit int default is 10 * * @return string JSON string is returned and then exit */ function input_livesearch_page_handler($page) { global $CONFIG; // only return results to logged in users. if (!$user = elgg_get_logged_in_user_entity()) { exit; } if (!$q = get_input('term', get_input('q'))) { exit; } $q = sanitise_string($q); // replace mysql vars with escaped strings $q = str_replace(array('_', '%'), array('\_', '\%'), $q); $match_on = get_input('match_on', 'all'); if (!is_array($match_on)) { $match_on = array($match_on); } // all = users and groups if (in_array('all', $match_on)) { $match_on = array('users', 'groups'); } if (get_input('match_owner', false)) { $owner_guid = $user->getGUID(); $owner_where = 'AND e.owner_guid = ' . $user->getGUID(); } else { $owner_guid = null; $owner_where = ''; } $limit = sanitise_int(get_input('limit', 10)); // grab a list of entities and send them in json. $results = array(); foreach ($match_on as $match_type) { switch ($match_type) { case 'users': $query = "SELECT * FROM {$CONFIG->dbprefix}users_entity as ue, {$CONFIG->dbprefix}entities as e WHERE e.guid = ue.guid AND e.enabled = 'yes' AND ue.banned = 'no' AND (ue.name LIKE '$q%' OR ue.username LIKE '$q%') LIMIT $limit "; if ($entities = get_data($query)) { foreach ($entities as $entity) { $result = array( 'type' => 'user', 'name' => $entity->name, 'desc' => $entity->username, 'icon' => '', 'guid' => $entity->guid ); $results[$entity->name . rand(1, 100)] = $result; } } break; case 'groups': // don't return results if groups aren't enabled. if (!elgg_is_active_plugin('groups')) { continue; } $query = "SELECT * FROM {$CONFIG->dbprefix}groups_entity as ge, {$CONFIG->dbprefix}entities as e WHERE e.guid = ge.guid AND e.enabled = 'yes' $owner_where AND (ge.name LIKE '$q%' OR ge.description LIKE '%$q%') LIMIT $limit "; if ($entities = get_data($query)) { foreach ($entities as $entity) { $result = array( 'type' => 'group', 'name' => $entity->name, 'desc' => strip_tags($entity->description), 'icon' => '', 'guid' => $entity->guid ); $results[$entity->name . rand(1, 100)] = $result; } } break; case 'friends': $query = "SELECT * FROM {$CONFIG->dbprefix}users_entity as ue, {$CONFIG->dbprefix}entity_relationships as er, {$CONFIG->dbprefix}entities as e WHERE er.relationship = 'friend' AND er.guid_one = {$user->getGUID()} AND er.guid_two = ue.guid AND e.guid = ue.guid AND e.enabled = 'yes' AND ue.banned = 'no' AND (ue.name LIKE '$q%' OR ue.username LIKE '$q%') LIMIT $limit "; if ($entities = get_data($query)) { foreach ($entities as $entity) { $result = array( 'type' => 'user', 'name' => $entity->name, 'desc' => $entity->username, 'icon' => '', 'guid' => $entity->guid ); $results[$entity->name . rand(1, 100)] = $result; } } break; default: header("HTTP/1.0 400 Bad Request", true); echo "livesearch: unknown match_on of $match_type"; exit; break; } } ksort($results); header("Content-Type: application/json"); echo json_encode(array_values($results)); exit; } /** * Register input functions and sanitize input * * @return void */ function input_init() { // register an endpoint for live search / autocomplete. elgg_register_page_handler('livesearch', 'input_livesearch_page_handler'); if (ini_get_bool('magic_quotes_gpc')) { /** * do keys as well, cos array_map ignores them * * @param array $array Array of values * * @return array Sanitized array */ function stripslashes_arraykeys($array) { if (is_array($array)) { $array2 = array(); foreach ($array as $key => $data) { if ($key != stripslashes($key)) { $array2[stripslashes($key)] = $data; } else { $array2[$key] = $data; } } return $array2; } else { return $array; } } /** * Strip slashes on everything * * @param mixed $value The value to remove slashes from * * @return mixed */ function stripslashes_deep($value) { if (is_array($value)) { $value = stripslashes_arraykeys($value); $value = array_map('stripslashes_deep', $value); } else { $value = stripslashes($value); } return $value; } $_POST = stripslashes_arraykeys($_POST); $_GET = stripslashes_arraykeys($_GET); $_COOKIE = stripslashes_arraykeys($_COOKIE); $_REQUEST = stripslashes_arraykeys($_REQUEST); $_POST = array_map('stripslashes_deep', $_POST); $_GET = array_map('stripslashes_deep', $_GET); $_COOKIE = array_map('stripslashes_deep', $_COOKIE); $_REQUEST = array_map('stripslashes_deep', $_REQUEST); if (!empty($_SERVER['REQUEST_URI'])) { $_SERVER['REQUEST_URI'] = stripslashes($_SERVER['REQUEST_URI']); } if (!empty($_SERVER['QUERY_STRING'])) { $_SERVER['QUERY_STRING'] = stripslashes($_SERVER['QUERY_STRING']); } if (!empty($_SERVER['HTTP_REFERER'])) { $_SERVER['HTTP_REFERER'] = stripslashes($_SERVER['HTTP_REFERER']); } if (!empty($_SERVER['PATH_INFO'])) { $_SERVER['PATH_INFO'] = stripslashes($_SERVER['PATH_INFO']); } if (!empty($_SERVER['PHP_SELF'])) { $_SERVER['PHP_SELF'] = stripslashes($_SERVER['PHP_SELF']); } if (!empty($_SERVER['PATH_TRANSLATED'])) { $_SERVER['PATH_TRANSLATED'] = stripslashes($_SERVER['PATH_TRANSLATED']); } } } elgg_register_event_handler('init', 'system', 'input_init');