<?php
function pexels_key() {
    $k = getenv('PEXELS_KEY');
    return $k && strlen($k) > 0 ? $k : 'Vc99rnmOhHhJAbgGQoKLZtsaIVfkeownoQNbTj78VemUjKh08ZYRbf18';
}

function pexels_get($url) {
    $ch = curl_init();
    curl_setopt_array($ch, [
        CURLOPT_URL => $url,
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_HTTPHEADER => [ 'Authorization: '. pexels_key() ],
        CURLOPT_TIMEOUT => 15,
    ]);
    $resp = curl_exec($ch);
    $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);
    if ($code >= 200 && $code < 300 && $resp) return json_decode($resp, true);
    return null;
}

function download_to($srcUrl, $destPath) {
    $data = file_get_contents($srcUrl);
    if ($data === false) return false;
    if (!is_dir(dirname($destPath))) mkdir(dirname($destPath), 0775, true);
    return file_put_contents($destPath, $data) !== false;
}
