PHP - Youtube to mp3 Conversion PART-2

In the previous part we have generated the downloading url.

There are some technical facts. You have to download the video on the server to actually convert the videos into mp3.

Tempvids is the directory to store temporary flv videos before conversion

So here is the code which can be used to download the video file on your server.

$data = file_get_contents($download_link);

$gets=$_GET['vid'].'.mp3';

$new_flv_path = dirname(_FILE_).'/tempvids/'.$_GET['vid'].'.flv' ;

file_put_contents($new_flv_path, $data);

At last you must require ffmpeg to convert flv into mp3 and provide them to the user for download.

exec("ffmpeg -i tempvids/".$_GET['vid'].".flv -vn -acodec copy ".$_GET['vid'].".mp3");

Few Tips:

• The download of the video is a time consuming process so the speed of the script depends on your server's downloading/transfer rate.

Build Spider/Crawler with PHP

PHPCrawl is a set of classes written in PHP for crawling/spidering websites, so just call it a webcrawler-library for PHP.

SOLUTION

The crawler "spiders" websites and delivers information about all found pages, links, files and so on to users of the library. By overriding a special method of the main-class users now decide what should happen to the pages and their content, files and other information the crawler finds.

PHPCrawl povides a lot of options to specify the behaviour of the crawler like URL- and Content-Type-filters, cookie-handling, limiter-options and much more.


Download: http://sourceforge.net/projects/phpcrawl/

PHP Example:

The following code is an complete example for using the class.
The listed script "crawls" a site and just prints out some information about found pages.

Please note that this example-script also comes in a file called "example.php" with the phpcrawl-package.

<?php

// It may take a whils to crawl a site ...
set_time_limit(10000);

// Inculde the phpcrawl-mainclass
include("classes/phpcrawler.class.php");

// Extend the class and override the handlePageData()-method
class MyCrawler extends PHPCrawler
{
function handlePageData(&$page_data)
{
// Here comes your code.
// Do whatever you want with the information given in the
// array $page_data about a page or file that the crawler actually found.
// See a complete list of elements the array will contain in the
// class-refenence.
// This is just a simple example.

// Print the URL of the actual requested page or file
echo "Page requested: ".$page_data["url"]."<br>";

// Print the first line of the header the server sent (HTTP-status)
echo "Status: ".strtok($page_data["header"], "\n")."<br>";

// Print the referer
echo "Referer-page: ".$page_data["referer_url"]."<br>";

// Print if the content was be recieved or not
if ($page_data["received"]==true)
echo "Content received: ".$page_data["bytes_received"]." bytes";
else
echo "Content not received";

// ...

// Now you should do something with the content of the actual
// received page or file ($page_data[source]), we skip it in this example

echo "<br><br>";
flush();
}
}

// Now, create an instance of the class, set the behaviour
// of the crawler (see class-reference for more methods)
// and start the crawling-process.

$crawler = &new MyCrawler();

// URL to crawl
$crawler->setURL("www.php.net");

// Only receive content of files with content-type "text/html"
// (regular expression, preg)
$crawler->addReceiveContentType("/text\/html/");

// Ignore links to pictures, dont even request pictures
// (preg_match)
$crawler->addNonFollowMatch("/.(jpg|gif|png)$/ i");

// Store and send cookie-data like a browser does
$crawler->setCookieHandling(true);

// Set the traffic-limit to 1 MB (in bytes,
// for testing we dont want to "suck" the whole site)
$crawler->setTrafficLimit(1000 * 1024);

// Thats enough, now here we go
$crawler->go();


// At the end, after the process is finished, we print a short
// report (see method getReport() for more information)

$report = $crawler->getReport();

echo "Summary:<br>";
if ($report["traffic_limit_reached"]==true)
echo "Traffic-limit reached <br>";

echo "Links followed: ".$report["links_followed"]."<br>";
echo "Files received: ".$report["files_received"]."<br>";
echo "Bytes received: ".$report["bytes_received"]."<br>";

?>