Spanish Christmas Lottery "Lotería de Navidad 2022" - PHP auto-checker

lottery.php

<?php
/*
    Spanish Christmas Lottery 2022 auto-checker in PHP
    --------------------------------------------------
    
    Fill your coupons below, 20€ is one ticket, insert the quantity you play of each number in euros
    Example: 20€ is one ticket, 10€ half a ticket (if you play with someone) or 40€ two tickets.
    
    You can also repeat the same number for two different people.
    
    It updates once every minute.
    
    Good luck!
    
    
    Author: Martín Durán <mduran@nvan.es>
*/

$coupons = [
    ['number' => '11111', 'quantity' => 20, 'person' => 'YOUR NAME'],
    ['number' => '22222', 'quantity' => 20, 'person' => 'YOUR NAME'],
    // Add as many entries as you want
];

function out($prestring, $poststring) {
    echo str_pad($prestring, 15, ' '), $poststring;
}

while(true)
{
    $cache = [];
    foreach($coupons as $coupon)
    {
        if(!isset($cache[$coupon['number']]))
            sleep(1);
        
        $response = $cache[$coupon['number']] ??= json_decode(explode('=', file_get_contents('https://api.elpais.com/ws/LoteriaNavidadPremiados?n=' . $coupon['number']), 2)[1], true);
        
        if($response['premio'] > 0)
        {
            echo out($coupon['person'] . ':', '[' . $coupon['number'] . ' - ' . $coupon['quantity'] . 'EUR] DING DING DING -> EL PREMIO SON:   ' . number_format($response['premio'] / 20 * $coupon['quantity'], 0, '', '.') . ' EUROS!!!');
        }
        else
        {
            echo out($coupon['person'] . ':', '[' . $coupon['number'] . ' - '  . $coupon['quantity'] . 'EUR] No tiene premio (de momento), sigue esperando...');
        }
        
        echo PHP_EOL;
    }
    echo '-------------------------------------------', PHP_EOL;
    sleep(60);
}