SQL错误可捕获的致命错误：类stdClass的对象无法转换为字符串

function getjobid() {
global $geotag_table, $wpdb;
$qry = "SELECT * FROM mirdc_jo_form WHERE  jo_id = (SELECT MAX(jo_id)  FROM mirdc_jo_form)";
$desc = $wpdb->get_results($qry);

return $desc; }
function getjobid() {
global $geotag_table, $wp