Beatport MP3 Downloader

#!/usr/bin/php
<?php

/**
 * Thank you, Beatport for having hardcoded JSON data right on your beats pages...
 * will expand further on this script at a later point in time..
 * For educational purposes only, please support your artists.
 * 
 * @author  Steve Birstok <steve@stevebirstok.com>
 *
 */

if (function_exists('apc_fetch')) {
  define('CAN_CACHE', true);
} else {
	define('CAN_CACHE', false);
}

function _curl ($url, $download_filename=false)
{
	$cache_name = 'beatport_hack#_curl('.sha1($url).')';
	if (CAN_CACHE) {
		$val = apc_fetch($cache_name);
		if ($val) {
			return $val;
		}
	}

	$ch = curl_init();
	curl_setopt($ch, CURLOPT_URL, $url);
	if ($download_filename) {
		$fh = fopen($download_filename, 'w');
		curl_setopt($ch, CURLOPT_FILE, $fh);
		curl_exec($ch);
		fflush($fh);
		fclose($fh);
		curl_close($ch);
	} else {
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		$content = curl_exec($ch);
		curl_close($ch);

		if (CAN_CACHE) {
			apc_store($cache_name, $content);
		}

		return $content;
	}

	return false;
}

if (count($argv) > 1) {
	$new_url = parse_url($argv[1]);
	if (isset($new_url['scheme'])) {
		$url = $argv[1];
	}
}

if (!isset($url)) {
	echo "Example Usage:\n".
		"\t".$argv[0]." http://sounds.beatport.com/pack/slo-mo-house/6853\n\n";
	die("Sorry, No URL was provided.\n");
}

$content = _curl($url);

preg_match_all('/(http\:.*?.mp3)/is', $content, $matches);

$mp3_urls = array();

foreach ($matches as $match) {
	$mp3_urls[] = $match[1];
}

$mp3_urls = array_unique($mp3_urls);

foreach ($mp3_urls as $key => $url) {
	$url = str_replace('\/', '/', $url);
	$mp3_urls[$key] = $url;

	echo 'Downloading '.$url." ...\n";
	$info = pathinfo($url);
	_curl($url, $info['basename']);
}