<?php
require_once 'vendor/autoload.php';

$client = new \GoogleTranslate\Client('GOOGLE ACCESS KEY HERE');

echo $client->translate('Hello world!', 'pt-br', $sourceLanguage);
// output: Olá Mundo!

echo $sourceLanguage;
// output: en

<?php
require_once 'vendor/autoload.php';

$client = new \GoogleTranslate\Client('GOOGLE ACCESS KEY HERE');

$sourceLanguage = 'pt-br';
echo $client->translate('Onde estou?', 'en', $sourceLanguage);
// output: Where am I?

<?php
require_once 'vendor/autoload.php';

$client = new \GoogleTranslate\Client('GOOGLE ACCESS KEY HERE');

$texts = [
    '¿Cómo estás?',
    'あなたはどこに住んでいますか？',
    'Where are you going?',
    'Essa lib é muito legal!'
];

print_r($client->translate($texts, 'en', $sourceLanguage));
/* output:
    Array
    (
        [0] => How are you?
        [1] => Where do you live?
        [2] => Where are you going?
        [3] => This lib is really cool!
    )
*/

print_r($sourceLanguage);
/* output:
    Array
    (
        [0] => es
        [1] => ja
        [2] => en
        [3] => pt
    )
*/

<?php
require_once 'vendor/autoload.php';

$client = new \GoogleTranslate\Client('GOOGLE ACCESS KEY HERE');

$texts = [
    '¿Cómo estás?',
    'あなたはどこに住んでいますか？',
    'Where are you going?',
    'Essa lib é muito legal!'
];

print_r($client->detect($texts));
/* output:
    Array
    (
        [0] => Array
        (
            [confidence] => 0.67241430282593
                [isReliable] =>
                [language] => es
            )
    
        [1] => Array
    (
        [confidence] => 1
                [isReliable] =>
                [language] => ja
            )
    
        [2] => Array
    (
        [confidence] => 0.67237991094589
                [isReliable] =>
                [language] => en
            )
    
        [3] => Array
    (
        [confidence] => 0.25708484649658
                [isReliable] =>
                [language] => pt
            )
    
    )
*/

<?php
require_once 'vendor/autoload.php';

$client = new \GoogleTranslate\Client('GOOGLE ACCESS KEY HERE');

print_r($client->detect('Let\'s help the community!'));
/* output:
    Array
    (
        [confidence] => 0.26097252964973
        [isReliable] =>
        [language] => en
    )
*/

<?php
require_once 'vendor/autoload.php';

$client = new \GoogleTranslate\Client('GOOGLE ACCESS KEY HERE');

print_r($client->languages('pt-br'));
/* output:
    Array
    (
        [0] => Array
            (
                [language] => af
                [name] => Africâner
            )

        [1] => Array
            (
                [language] => sq
                [name] => Albanês
            )

        [2] => Array
            (
                [language] => de
                [name] => Alemão
            )

        [3] => Array
            (
                [language] => ar
                [name] => Árabe
            )

        [4] => Array
            (
                [language] => hy
                [name] => Armênio
            )
        [5] => Array
            (
                [language] => zh
                [name] => Chinês (simplificado)
            )
        [6] => Array
            (
                [language] => fr
                [name] => Francês
            )
        .
        .
        .
    )
*/

<?php
require_once 'vendor/autoload.php';

$client = new \GoogleTranslate\Client('GOOGLE ACCESS KEY');

print_r($client->languages());
/* output:
    Array
    (
        [0] => Array
            (
                [language] => af
            )
    
        [1] => Array
            (
                [language] => am
            )
    
        [2] => Array
            (
                [language] => ar
            )
    
        [3] => Array
            (
                [language] => az
            )
    
        [4] => Array
            (
                [language] => be
            )
    
        [5] => Array
            (
                [language] => bg
            )
    
        [6] => Array
            (
                [language] => bn
            )
        .
        .
        .
    )
*/