<?php

$host = "imap.gmail.com";
$ssl = true;
$port = 993;
$folder = "Caixa de entrada";
$user = "";
$pass = "";

$ssl= ($ssl == false) ? "/novalidate-cert" : "";

$connection = imap_open("{"."$host:$port/pop3$ssl"."}$folder",$user,$pass);

$check = imap_mailboxmsginfo($connection);

var_dump((array)$check);