$login = filter_var(trim($_POST['login']), FILTER_SANITIZE_STRING)

$name = filter_var(trim($_POST['name']), FILTER_SANITIZE_STRING)

$pass = filter_var(trim($_POST['pass']), FILTER_SANITIZE_STRING)

} else if(mb_strlen($name) < 3  mb_strlen($name) > 12){

} else if(mb_strlen($name) < 3 && mb_strlen($name) > 12){

<?php
   
$currentDate = date('Y-m-d');
$currentDate = date('Y-m-d', strtotime($currentDate));
   
$startDate = date('Y-m-d', strtotime("01/09/2019"));
$endDate = date('Y-m-d', strtotime("01/10/2019"));
   
if (($currentDate >= $startDate) && ($currentDate <= $endDate)){
    echo "Current date is between two dates";
}else{
    echo "Current date is not between two dates";  
}