Software livre e padrões abertos no desenvolvimento Web
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Software livre e padrões abertos no desenvolvimento
Web
Felipe [email protected]://feliperibeiro.com@felipernb
Saturday, September 19, 2009
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Felipe Ribeiro
•Graduando (concluinte) em Ciência da Computação na UFCG
•Zend Certified Engineer - PHP5
•Trabalha com desenvolvimento Web, atualmente na startup Shoprizer.com
•Membro fundador do grupo PHP-PB
•Contribuidor do PHP no Google Summer ofCode 2009
•Ex-contribuidor do projeto Mozilla Camino
Saturday, September 19, 2009
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A Web
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A Web
Softwares distintos se comunicando, independente de plataforma, fornecedor e linguagem de programação
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Como é possível?
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Como é possível?
TCP/IP HTTP
HTML CSS
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Padrões abertos são padrões disponíveis para livre acesso e
implementação, que independem de royalties e outras taxas e sem
discriminação de uso.
Padrões abertos
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Porque padrões abertos são
importantes?
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Em alguns lugares do oriente médio, esse gesto...
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Então é melhor usar algo que todos possam
entender!
seria interpretado assim...
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W3C é um consórcio de empresa que regulamenta os padrões da Web, entre eles:
• HTML
• XML
• XHTML
• XPath
• XQuery
• XSLT
• CSS
• SVG
• SOAP, WSDL (Web Services)
• OWL (Web Semântica)
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•Desenho vetorial em Canvas•Armazenamento de informação no cliente•Drag-and-drop•Tags para vídeo e áudio, evitando a necessidade de
plugins•Polêmica na escolha do padrão de vídeo
•Ogg Theora - Padrão aberto•H.264 - Padrão proprietário
•Animações•Entre outras coisas
HTML5
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A maioria dos servidores Web roda software livre
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LAMP
LinuxApacheMySQLPHP
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E isso presta?Na universidade eu aprendi que Java
é a solução para todos os meus problemas.
Quem usa PHP?
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delicious
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É... parece que vale a pena conhecer...
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"PHP is not about purity in CS principles or architecture; it is about solving the ugly web
problem with an admittedly ugly, but extremely functional and convenient solution. If you are
looking for purity, you are in the wrong boat. Get out now before you get hit by a wet cat!" -
Rasmus LerdorfSaturday, September 19, 2009
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1993
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1993
<HTML> <HEAD> <TITLE>My Personal Home Page</TITLE> </HEAD> <BODY> This is my cool page<P> And look at my counter<P> <IMG SRC="/cgi-bin/counter.pl"> </BODY></HTML>
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1994<!--getenv HTTP_USER_AGENT--><!--ifsubstr $exec_result Mozilla-->Hey, you are using Netscape!<p><!--endif-->
<!--sql database select * from table where user='$username'-->
<!--ifless $numentries 1-->Sorry, that record does not exist<p><!--endif exit-->
Welcome <!--$user-->!<p>You have <!--$index:0--> credits left in your account.<p>
<!--include /text/footer.html-->
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1995
<? $name = "bob"; $db = "db"; $result = msql($db,"select * from table where firstname='$name'"); $num = msql_numrows($result); echo "$num records found!<p>"; $i=0; while($i<$num); echo msql_result($result,$i,"fullname"); echo "<br>"; echo msql_result($result,$i,"address"); echo "<br>"; $i++; endwhile;>
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2005<?phpclass db { protected static $dbh = false;
function connect() { self::$dbh = new PDO('mysql:host=localhost;dbname=test','user','pass'); self::$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); }}
class items extends db { function load($name) { if(!self::$dbh) $this->connect(); try { if(!self::$dbh) $this->connect(); $stmt = self::$dbh->prepare("SELECT * FROM items WHERE firstname=:name ORDER by ctime desc"); $ret = $stmt->execute(array('name'=>$name)); } catch (PDOException $e) { die($e->getMessage()); } return $ret; }}
?>
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2009Closures
<?php$getClosure = function($v) { return function() use($v) { echo "Hello World: $v!\n"; };};
$closure = $getClosure(2);$closure();?>
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2009Namespaces
<?php
namespace foo;
class bar { function __construct() { echo get_called_class(); }}?>
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Que ferramentas utilizar no
desenvolvimanto?
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PHP é seguro?
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Free/Open/NetBSD são seguros?
MS Windows® é seguro?
Saturday, September 19, 2009
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São todos escritos principalmente em
C!
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A linguagem de programação não é
o fator determinante na
segurança de um sistema
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PHP está pronto para aplicações “enterprise”?
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XML
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SOAP
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Saturday, September 19, 2009
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REST
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Saturday, September 19, 2009
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JSON
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JSON
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Existem pacotes reutilizáveis em
PHP?
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PEAR
Saturday, September 19, 2009
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PEAR
PHPExtension and Application Repository
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Saturday, September 19, 2009
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• Pacotes escritos por membros ativos da comunidade PHP
• Tudo testado por um time exigente de controle de qualidade.
• Gerenciamento “a la apt-get”:Ex.: pear install Logpear upgrade PHPUnitpear uninstall Text_CAPTCHA
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Frameworks
Para todos os gostos, dos mais “Java-like” aos mais “Rails-like”
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Frameworks
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E o mercado?Saturday, September 19, 2009
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PHP é a linguagem mais popular da Web
O desenvolvimento de aplicações é rápido e menos custoso
Startups surgem todos os dias
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Grandes players estão investindo no PHP
IBMYahoo!Microsoft
Mercado amadurecido e certificações
Saturday, September 19, 2009
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Quer saber mais
sobre o PHP?
Grupo de desenvolvedores PHP da ParaíbaIII Encontro será no dia 31/10/2009 no
SEBRAE em João Pessoa
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<?php
echo("Dúvidas?");
$contato = array( "nome" => "Felipe Ribeiro", "email" => "[email protected]", "blog" => "http://feliperibeiro.com", "twitter" => "@felipernb");
var_dump($contato);
?>
Saturday, September 19, 2009