class Tweet{
	var $user;
	var $pass;
	var $json = false;
 
	function __construct($user, $pass, $texto=false){
		$this->user = $user;
		$this->pass = $pass;
		if ($texto) $this->send($texto);
	}
 
	private function testTweet($texto, $match){
		foreach ($match as $m){
			$url = $m[0];
			if (ereg("^www", $url)) $url = "http://$url";
			if (strlen($url) > 19) $url = str_repeat("x", 19);
			$texto = str_replace($m[0], $url, $texto);
		}
		$texto = ereg_replace("http://(x{19,})", "\\1", $texto);
		if (strlen($texto) > 140) return false;
		return true;
	}
 
	public function makeUrl($url){
		if (ereg("^www", $url)) $url = "http://$url";
		if (strlen($url) <= 19) return $url;
		$url = "http://migre.me/atalho/" . urlencode($url);
		$ch = curl_init();
		curl_setopt_array($ch, array(
			CURLOPT_URL => $url,
			CURLOPT_RETURNTRANSFER => true
		));
		$o = curl_exec($ch);
		ereg ("value=\"(http://migre.me/[a-zA-Z0-9/:]+)\"", $o, $mat);
		return $mat[1];
	}
 
	public function send($texto){
		if (function_exists("curl_init")){
			// Localiza as URLs
			preg_match_all("/((https?:\/\/)|(www))([a-zA-Z0-9\/:%&\?\.=\-\+]+)/", $texto, $match, PREG_SET_ORDER );
 
			// Testa se o tamanho do twitter é aceitavel
			if (!$this->testTweet($texto, $match)) throw new Exception ("Postagem muito longa!");
 
			// Cria as URLs finais
			foreach ($match as $m) $texto = str_replace($m[0], $this->makeUrl($m[0]), $texto);
			$texto = str_replace("http://http://", "http://", $texto);
 
			// Testa novamente pelo comprimento do tweet
			if (strlen($texto) > 140) throw new Exception ("Postagem muito longa!");
 
			// Envia o tweet
			$ch = curl_init();
			curl_setopt_array($ch, array(
				CURLOPT_URL => "http://twitter.com/statuses/update.json",
				CURLOPT_HTTPHEADER => array('Expect:'),
				CURLOPT_POST => 1,
				CURLOPT_POSTFIELDS => array("status" => "{$texto}"),
				CURLOPT_HTTPAUTH => CURLAUTH_ANY,
				CURLOPT_RETURNTRANSFER => true,
				CURLOPT_USERPWD => "{$this->user}:{$this->pass}")
			);
			return $this->json = curl_exec($ch);
		}
		return $this->json = false;
	}
}
 
$tmp = new Tweet("username", "password");
echo $tmp->send("Eu não gosto das URLs do site da Microsoft: http://search.microsoft.com/results.aspx?form=MSHOME&setlang=en-us&q=office+templates&mkt=en-US");