<?php

function tr(string $sl, string $tl, string $txt): array {
    if (empty($sl) || empty($tl)) return ['c' => false, 'e' => 'Lang. req.'];
    if (empty($txt)) return ['c' => false, 'e' => 'Txt. req.'];
    if ($sl === $tl) return ['c' => false, 'e' => 'Same lang.'];
    if (mb_strlen($txt) > 3000) return ['c' => false, 'e' => 'Txt. too long'];

    $et = urlencode($txt);
    $url = "https://translate.googleapis.com/translate_a/single?client=gtx&sl={$sl}&tl={$tl}&dt=t&q={$et}";

    $ch = curl_init();
    curl_setopt_array($ch, [
        CURLOPT_URL => $url,
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_SSL_VERIFYHOST => false,  
        CURLOPT_SSL_VERIFYPEER => false,  
        CURLOPT_ENCODING => 'UTF-8',
        CURLOPT_USERAGENT => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36',
    ]);

    $out = curl_exec($ch);
    $hc = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);

    if ($out === false || $hc != 200) return ['c' => false, 'e' => 'Trans. err.'];

    $resp = json_decode($out, true);
    if ($resp === null) return ['c' => false, 'e' => 'Inv. resp.'];

    $trTxt = '';
    foreach ($resp[0] as $part) $trTxt .= $part[0];

    $detSl = $resp[2];

    return [
        'c' => true,
        'm' => $trTxt,
        'i' => $txt,
        'in' => strtoupper($detSl),
        'ou' => strtoupper($tl),
    ];
}

$res = tr('auto', 'pt', 'STUPID HUMANS');

if (!$res['c']) echo "Error: " . $res['e'] . "\n";
else {
    echo "Lang.: " . $res['in'] . "\n";
    echo "Input: " . $res['i'] . "\n";
    echo 'Text: ' . $res['m'] . "\n";
}

?>