youtube_transcript_api_example.php

<?php

// Example usage of YouTube Transcript API equivalent in PHP
// Note: The original YouTube Transcript API is Python-based, so this uses the Google YouTube Data API v3 via the Google PHP Client Library.
// Install it first: composer require google/apiclient
// You'll need a YouTube API key from the Google Developer Console.

require 'vendor/autoload.php';

use Google_Client;
use Google_Service_YouTube;

$client = new Google_Client();
$client->setDeveloperKey('YOUR_YOUTUBE_API_KEY_HERE');  // Replace with your API key
$youtube = new Google_Service_YouTube($client);

try {
    $videoId = 'exampleVideoIdHere';  // Replace with a real video ID, e.g., 'dQw4w9WgXcQ'
    
    // Fetch captions, which can serve as transcripts if available
    $captions = $youtube->captions->listCaptions('snippet', $videoId, array('onBehalfOfContentOwner' => '', 'tfmt' => 'srv3'));
    
    if (!empty($captions['items'])) {
        foreach ($captions['items'] as $caption) {
            // Download and process the caption track
            $captionUrl = $caption['snippet']['audioTrackUrl'];  // Hypothetical; adapt as needed
            $captionContent = file_get_contents($captionUrl);  // Fetch the content
            echo "Transcript: " . $captionContent . "\n";  // Output the transcript text
        }
    } else {
        echo "No captions or transcripts available for this video.\n";
    }
} catch (Exception $e) {
    echo "Error: " . $e->getMessage() . "\n";
}

// End of script
?>