How to extract $_POST array by elements?

Question

PHP

There is a code:

if(isset($_POST['sendmessege'])){
  $body = "Пользователь заказал: <br>";
  $mail_subject = "Заказ";
  $to = "[email protected]";
  $mail_headers="content-type:text/html; charset=UTF-8";

  foreach($_POST as $key => $array){
    $body .= "{$array}<br>";
  }
  mail($to, $mail_subject, $body, $mail_headers); 
}

How can you do that?
$body .= "{'Some text - '$array['First element'],'Some text' - $array['Second element'],'Some text' - $array['Third element'] }"

Answer 1

array_shift
But it's better not to do that!

Answer 2

It's not a good approach to POST directly somewhere... I would sanitize first.
But if needed:
implode('<br>', $_POST);