Need basic php help

im new to php and don’t know the proper way to write the code for my form.
i know the problem is in both lines with the multiple $_POST i just don’t know how to write it correctly. please help asap.

<?php
$sendTo = “name@domain.com”;
$subject = “Party Request Message”;

$headers = "From: " . $_POST[‘name’];
$headers .= “<” . $_POST[‘email’] . ">
";
$headers .= "Reply-To: " . $_POST[‘email’] . "
";
$headers .= "Return-Path: " . $_POST[‘email’];
$message = "Phone: " . $_POST[‘phone’];
$message = "Date: " . $_POST[‘day’] “/” $_POST[‘month’] “/” $_POST[‘year’];
$message = "Number of guests: " . $_POST[‘guests’];
$message = "Start Time: " . $_POST[‘hour’] “:” $_POST[‘minute’];
$message = "Type of Occasion: " . $_POST[‘occasion’];
$message = "Private Room: " . $_POST[‘room’];
$message = $_POST[‘message’];

mail($sendTo, $subject, $message, $headers);
?>