function validate_session($credential_store = 'credential')
{
$pk_entity = -1;
if (is_missing($_SESSION, $credential_store)) {
# Server has no session credentials stored.
}
if (is_missing_or_empty($_SESSION, $credential_store)) {
error_log("db_lib/validate_session() credential exists, but is empty");
return -1;
}
$entity_record = $_SESSION[$credential_store];
$pk_entity = intval($entity_record['entity']);
if ($pk_entity <= 0) {
return -1;
}
if (is_false($entity_record, 'entity')) {
$pk_entity = null;
return -1;
}
return $pk_entity;
}
function is_missing()
{
$params = func_get_args();
$count = func_num_args();
if ($count === 0) {
return true;
}
if ($count === 1) {
$value = $params[0];
if (is_null($value) || empty($value) || !isset($value)) {
return true;
}
}
if ($count >= 2) {
$array = $params[0];
$key = $params[1];
if (is_missing($array) || is_missing(key)) {
return true;
}
if (is_array($array) && !is_array($key)) {
$value = $array[$key];
return is_missing($value);
}
return true;
}
return false;
}