/**
* Initializes library with JSON file at $path.
*/
public static function init($path)
{
// ensure library is not already initialized
if (isset(self::$config)) {
trigger_error("CS50 Library is already initialized", E_USER_ERROR);
}
// ensure configuration file exists
if (!is_file($path)) {
trigger_error("Could not find {$path}", E_USER_ERROR);
}
// read contents of configuration file
$contents = file_get_contents($path);
if ($contents === false) {
trigger_error("Could not read {$path}", E_USER_ERROR);
}
// decode contents of configuration file
$config = json_decode($contents, true);
if (is_null($config)) {
trigger_error("Could not decode {$path}", E_USER_ERROR);
}
// store configuration
self::$config = $config;
}