Fetches a value from the cache, with the option of calculating on miss
| public get ( string | integer $key, callable $callback = null, mixed $default = null ) : mixed | ||
| $key | string | integer | A plain string ID for the cache entry |
| $callback | callable | Logic for calculating the cache entry on miss |
| $default | mixed | Default value returned if the value is missing and no callback is provided |
| 리턴 | mixed | The cache value or the $default if no value and no callable |
/**
* Get the value of a datalist element.
*
* Plugin authors should use elgg_get_config() and pass null for the site GUID.
*
* @internal Datalists are stored in the datalist table.
*
* @tip Use datalists to store information common to a full installation.
*
* @param string $name The name of the datalist
* @return string|null|false String if value exists, null if doesn't, false on error
* @access private
*/
function get($name)
{
$name = trim($name);
if (!$this->validateName($name)) {
return false;
}
return $this->cache->get($name, function () use($name) {
$escaped_name = $this->db->sanitizeString($name);
$result = $this->db->getDataRow("SELECT * FROM {$this->table} WHERE name = '{$escaped_name}'");
return $result ? $result->value : null;
});
}
/**
* Get scraped data
*
* @param string $url URL
* @return array|void
* @throws \InvalidArgumentException
*/
public function get($url)
{
if (!filter_var($url, FILTER_VALIDATE_URL)) {
throw new \InvalidArgumentException(__METHOD__ . ' expects a valid URL');
}
$data = $this->cache->get(sha1($url));
if ($data) {
return $data;
}
$dbprefix = elgg_get_config('dbprefix');
$row = get_data_row("\n\t\t\tSELECT * FROM {$dbprefix}scraper_data\n\t\t\tWHERE url = :url\n\t\t", null, [':url' => $url]);
return $row ? unserialize($row->data) : null;
}
/**
* Gets the id associated with this string, case-sensitively.
* Will add the string to the table if not present.
*
* @param string $string The value
*
* @return int
*/
private function getIdCaseSensitive($string)
{
$string = (string) $string;
return $this->cache->get($string, function () use($string) {
$escaped_string = $this->db->sanitizeString($string);
$query = "SELECT * FROM {$this->getTableName()} WHERE string = BINARY '{$escaped_string}' LIMIT 1";
$results = $this->db->getData($query);
if (isset($results[0])) {
return $results[0]->id;
} else {
return $this->add($string);
}
});
}
/**
* Get the value of a datalist element.
*
* Plugin authors should use elgg_get_config() and pass null for the site GUID.
*
* @internal Datalists are stored in the datalist table.
*
* @tip Use datalists to store information common to a full installation.
*
* @param string $name The name of the datalist
* @return string|null|false String if value exists, null if doesn't, false on error
* @access private
*/
function get($name)
{
$name = trim($name);
// cannot store anything longer than 255 characters in db, so catch here
if (elgg_strlen($name) > 255) {
$this->logger->error("The name length for configuration variables cannot be greater than 255");
return false;
}
return $this->cache->get($name, function () use($name) {
$escaped_name = $this->db->sanitizeString($name);
$result = $this->db->getDataRow("SELECT * FROM {$this->table} WHERE name = '{$escaped_name}'");
return $result ? $result->value : null;
});
}
/**
* Returns an \ElggPlugin object with the path $path.
*
* @param string $plugin_id The id (dir name) of the plugin. NOT the guid.
* @return \ElggPlugin|null
*/
function get($plugin_id)
{
return $this->plugins_by_id->get($plugin_id, function () use($plugin_id) {
$plugin_id = sanitize_string($plugin_id);
$db_prefix = get_config('dbprefix');
$options = array('type' => 'object', 'subtype' => 'plugin', 'joins' => array("JOIN {$db_prefix}objects_entity oe on oe.guid = e.guid"), 'selects' => array("oe.title", "oe.description"), 'wheres' => array("oe.title = '{$plugin_id}'"), 'limit' => 1, 'distinct' => false);
$plugins = elgg_get_entities($options);
if ($plugins) {
return $plugins[0];
}
return null;
});
}
