<?php
$servername = "localhost";
$username = "root";
$password = "vertrigo";
$dbname = "db";

$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

function an($hora){
global $conn;
$data = date("d/m/Y");
$sql = "SELECT * from argenda where hora='$hora' && data='$data'";
$result = $conn->query($sql);
if($result->num_rows == 0){
    return "Disponivel";
} else{
    return "Locado";
}
}
?>