Cloud Run example.

Dockerfile

FROM composer:latest as composer

COPY src /var/www/html
WORKDIR /var/www/html

ENV COMPOSER_ALLOW_SUPERUSER 1

RUN composer install && composer dump-autoload
RUN composer require google/cloud-language

FROM php:apache-stretch

COPY --from=composer /var/www/html .

RUN docker-php-ext-install bcmath

RUN sed -i 's/80/${PORT}/g' /etc/apache2/sites-available/000-default.conf /etc/apache2/ports.conf

index.php

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

use Google\Cloud\Language\V1beta2\Document;
use Google\Cloud\Language\V1beta2\Document\Type;
use Google\Cloud\Language\V1beta2\LanguageServiceClient;
/**
 * Find the sentiment in text.
 * ```
 * analyze_sentiment('Do you know the way to San Jose?');
 * ```
 *
 * @param string $text The text to analyze.
 * @param string $projectId (optional) Your Google Cloud Project ID
 *
 */
function analyze_sentiment($text, $projectId = null)
{
    $languageServiceClient = new LanguageServiceClient(['projectId' => $projectId]);
    try {
        // Create a new Document
        $document = new Document();
        // Pass GCS URI and set document type to PLAIN_TEXT
        $document->setContent($text)->setType(Type::PLAIN_TEXT);
        // Call the analyzeSentiment function
        $response = $languageServiceClient->analyzeSentiment($document);
        $document_sentiment = $response->getDocumentSentiment();
        // Print document information
        echo "<p><b>Full Sentence:</b> " . $text . "</p>";
        echo "<ul>";
        printf("<li>" . '<b>Document Sentiment:</b>' . "</li>");
        printf("<li>" . '<b>Magnitude:</b> %s' . "</li>", $document_sentiment->getMagnitude());
        printf("<li>" . '<b>Score:</b> %s' . "</li>", $document_sentiment->getScore());
        $sentences = $response->getSentences();
        echo "<li><b><i>Sentences:</i></b></li>";
        echo "<ul>";
        foreach ($sentences as $sentence) {
            printf("<li>" . '<i>Sentence:</i> %s' . "</li>", $sentence->getText()->getContent());
            printf("<li>" . '<i>Sentence Sentiment:</i>' . "</li>");
            $sentiment = $sentence->getSentiment();
            if ($sentiment) {
                printf("<li>" . '<i>Entity Magnitude:</i> %s' . "</li>", $sentiment->getMagnitude());
                printf("<li>" . '<i>Entity Score:</i> %s' . "</li>", $sentiment->getScore());
            }
        }
        echo "</ul>";
        echo "</ul>";
    } finally {
        $languageServiceClient->close();
    }
}

if($_GET['text'] && strlen($_GET['text']) > 0) {
    analyze_sentiment($_GET['text']);
}