Get latest versions of a list of PHP PECL extensions

check.php

<?php
/*
 * Usage:
 * $ php check.php --extensions="apc memcached redis"
 * apc: 3.1.13
 * memcached: 2.2.0
 * redis: 2.2.5
 */

class PHPExtensionUpdates {

	function __construct() {
		$this->longopts = getopt("", array(
			'help::',
			'extensions::',
		));
		$this->extensions = array(
		);
		$this->upstream = array();
		$this->xml = array();
		$this->base_url = "http://pecl.php.net/feeds/pkg_{PACKAGE_NAME}.rss";
	}

	function extensions() {
		return $this->extensions;
	}

	function parseLongOpts() {
		if (array_key_exists('extensions', $this->longopts)) {
			$extensions = split(' ', $this->longopts['extensions']);
			$this->extensions = array_merge($this->extensions, $extensions);
		}
	}

	function run() {
		$this->parseLongOpts();
		if (array_key_exists('help', $this->longopts)) {
			$this->printHelp();
		} else {
			foreach ($this->extensions() as $ext) {
				$this->getFeed($ext);
				$this->check($ext);
			}
			$this->printVersions();
		}
	}

	function getFeed($ext) {
		if ( ! isset($this->xml[$ext]) ) {
			$raw = file_get_contents(str_replace('{PACKAGE_NAME}', $ext, $this->base_url));
			if ($raw) {
				$this->xml[$ext] = simplexml_load_string($raw);
			}
		}
	}

	function check($ext) {
		if (array_key_exists($ext, $this->xml)) {
			$title = $this->xml[$ext]->item[0]->title;
			list($_, $version) = split(' ', $title);
			$this->upstream[$ext] = $version;
		}
	}

	function printVersions() {
		foreach ( $this->upstream as $k => $v ) {
			print("$k: $v\n");
		}
	}

	function printHelp() {
		$filename = basename(__FILE__);
		$helptext = <<<HELPTEXT
PHP Extension Update Checker

--help              Show this help message.
--extensions        Accepts a space separated list of extensions to check.
                    Example: php $filename --extensions="apc memcached redis"

HELPTEXT;
		print($helptext);
	}

}

try {
	$runner = new PHPExtensionUpdates();
	$runner->run();
} catch (Exception $e) {
	print($e->getMessage());
}