Hi,

I'm trying to follow and make this translator and am stuck at 19:38. When I set the target language to a language and type "hello" I get the following error in the console:

Warning: Undefined array key "lang_two" in /Users/--------/Downloads/LangTranslator/process.php on line 8 

 

Fatal error: Uncaught TypeError: Stichoza\GoogleTranslate\GoogleTranslate::__construct(): Argument #1 ($target) must be of type string, null given, called in /Users/---------/Downloads/LangTranslator/process.php on line 12 and defined in /Users/------------/Downloads/LangTranslator/vendor/stichoza/google-translate-php/src/GoogleTranslate.php:108

Stack trace:

#0 /Users/---------/Downloads/LangTranslator/process.php(12): Stichoza\GoogleTranslate\GoogleTranslate->__construct(NULL)

#1 {main}

thrown in /Users/--------/Downloads/LangTranslator/vendor/stichoza/google-translate-php/src/GoogleTranslate.php on line 108

The console is supposed to print "en", for English as the auto-detect (source) language.

This is my process.php code so far:

<-?php

require_once 'vendor/autoload.php';

use Stichoza\GoogleTranslate\GoogleTranslate;

$lang_one = $_POST['lang_one'];
$lang_two = $_POST['lang_two'];
$text = $_POST['text'];

if ($lang_one == "AUTO_DETECT") {
    $tr = new GoogleTranslate($lang_two);

$text = $tr->translate($text);

echo $tr->getLastDetectedSource(); // Output: en
} else {
    echo $tr->setSource($lang_one)->setTarget($lang_two)->translate($text);
}`

And app.js:

$(document).ready(function(){
    $("#convert").on("click", function() {
        var lang_one = $("#lang_one").val();
        var lang_two = $("#lang_two").val();
        var text = $("#text").val();

    $.ajax({
        url: "process.php",
        method: "post",
        data: {lang_one: lang_one, lang_two:lang_two, text: text},
        success: function(status){
            console.log(status);
        },
    });
});
});

I'm not sure why the error shows up. It says a type error but I can't really identify one in my code. I tried to add a try-catch block after seeing a SO post:

<-?php

require_once 'vendor/autoload.php';

use Stichoza\GoogleTranslate\GoogleTranslate;

$lang_one = $_POST['lang_one'];
$lang_two = $_POST['lang_two'];
$text = $_POST['text'];

try {
    if ($lang_one == "AUTO_DETECT") {
        $tr = new GoogleTranslate($lang_two);

    $text = $tr->translate($text);

    echo $tr->getLastDetectedSource(); // Output: en
} else {
    echo $tr->setSource($lang_one)->setTarget($lang_two)->translate($text);
}
}
catch (TypeError $e) {
    echo 'error!!';
}

And now it throws in the console:

Warning: Undefined array key "lang_two" in /Users/--------/Downloads/LangTranslator/process.php on line 8 
error!!

I downloaded composer (version 2.4.2), just like in the video, and followed the steps to import the google translate Github library. Can someone please help me fix this TypeError? Thanks!