$array = array();
$i = 0;
foreach ($results["results"] as $value) {
$array["results"] = array(
"title" => $value["title"],
"text" => 'CAS - номер: '.$value["text"],
"url" => "/{$value["url_name"]}"
);
$i++;
}
$array["results"] += ["count" => $i, "error" => NULL];
var_dump($array);