PHP é uma linguagem de processamento interpretada pelo servidor Esta é a terceira aula do curso de Web Development organizado pela MozDevz, mais informações visite: www.mozdevz.org

1. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Web Development Training
PHP Básico
Definição
Preparação de ambiente
Sintaxe / Operações básicas
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1

2. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
O que é PHP ?
• linguagem interpretada
• Interpretado do Servidor
• HTML+CSS+JavaScript+PHP
• arquivos PHP tem extensão
" .php "
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2

3. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Seu Poder
• PHP pode gerar páginas com
conteúdo dinâmico
• PHP pode criar, abrir, ler,
escrever, apagar e fechar
arquivos no servidor
• PHP pode coletar dados de
formulários
• PHP pode enviar e receber
cookies
• PHP pode adicionar, eliminar,
modificar dados na base de
dados
• PHP pode ser usado para
controlar o acesso de
utilizadores
• PHP pode criptografar os
dados
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3

4. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Instalação
• Encontrar um host com PHP e suporte ao MySQL
• Instalar um servidor web no seu próprio PC, em seguida,
instalar o PHP e MySQL
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4

5. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Declaração
<?php
//O código PHP fica aqui!
?>
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5

6. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Variaveis
<?php
$txt = "Hello world!";
$x = 5;
$y = 10.5;
?>
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7. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Comentários
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# Isto é apenas um comentário
// Isto também é um comentário
/* comentário */
7

8. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
ECHO
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<?php
$txt1 = "Learn PHP";
$txt2 = "W3Schools.com";
$x = 5;
$y = 4;
echo "<h2>$txt1</h2>";
echo "Study PHP at $txt2<br>";
echo $x + $y;
?>
8

9. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
If – Then - Else
if (condição) {
Código que é executado se a condição fôr
verdadeira;
}
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$x = 2; # Variáveis
if ($x >= 1 && $x < 3) { // se a variavel $x for
maior ou igual a 1 E(AND) menor que 3
echo 'Olá mundo!'; // escreve "Olá mundo!"
} else { // Se não...
print('Adeus mundo!'); // escreve 'Adeus
mundo!', print e echo podem ser usados com ou sem
parênteses.
}
9

10. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Web Development Training
Formulários e PHP
Ruben Manhiça
Jorge Lobo
Hervé Muneza
3/28/16
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11. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Conceptos por aprender
• Formulários
• Métodos GET e POST
• Acesso no Servidor
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The image part with relationship ID rId2 was not found in the file.
11

12. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Formulários
• Permite enviar
dados para o
servidor
• Pode ser enviado
usando os
métodos POST e
GET
<html>
<body>
<form action =”processar.php”
method=”post">
Name: <input type=”text” name=”nome” />
Age: <input type=”text” name=idade” />
<input type=”submit” />
</form>
</body>
</html>
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12

13. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
GET e POST
Criam um vetor com um par de
chaves/valores.
Chaves – nomes de
controle do formulário;
v a l o r e s – d a d o s
introduzidos no formulários .
html>
<body>
<form action =”processar.php”
method=”get">
Name: <input type=”text”
name=”nome” />
....
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13

14. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
GET
Tem a limitação de só enviar 100 caracteres;
Mostra a informação enviada no Navegador;
Permite guardar a requisição ao Servidor no Bookmarks;
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The image part with relationship ID rId2 was not found in the file.
14

15. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
POST
Método POST
Não tem limite de tamanho da
mensagem a enviar;
A informação enviada não é
visível no navegador;
html>
<body>
<form action =”processar.php”
method=”post">
Name: <input type=”text”
name=”nome” />
....
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15

16. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Acesso do Servidor
Método GET
$_GET[”nome"]
Método POST
$_POST[”nome"]
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16

17. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Exemplo
Index.php
html>
<body>
<form action =”processar.php”
method=”post">
Name: <input type=”text” name=”nome” /
>
Age: <input type=”text” name=idade” />
<input type=”submit” />
</form>
</body>
</html>
Processar.php
<?php
If(empty($_POST["nome"])) {
echo ”Preencha o seu nome”;
} else {
$nome = $_POST["nome"];
}
?>
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17

18. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Referencias
• Lengstorf, Jason. PHP For Absolute Beginners. [New
York.]: Apress, 2009. Print.
• Welling, Luke, and Laura Thomson. PHP And Mysql
Web Development. Upper Saddle River, NJ: Addison-
Wesley, 2008. Print.
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19. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Web Development Training
PHP e MySQL
Ruben Manhiça
Jorge Lobo
Hervé Muneza
3/28/16
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19

20. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Base de dados – MySQL – Acesso ao servidor
• Passo 1 - Abrir conexão com o banco.
• Antes de criarmos a conexão com o banco devemos ter em mãos algumas
informações. São elas:
• Utilizador – Nome de Utilizador com acesso a base de dados.
• Senha – Senha do Utilizador.
• Host – Nome ou IP do servidor. Ex: “localhost”
• De posse dessas informações podemos criar nossa conexão com a Base
de dados utilizando o comando mysql_connect();
mysql_connect(host, Utilizador, senha);
• Em caso de sucesso, este comando retorna um identificador de
conexão. Em caso de falha este comando retornará FALSE.
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21. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Base de dados – MySQL – Acesso ao servidor
• Exemplo
$conexao = mysql_connect(“host”,“Utilizador”, “senha”);
if ($conexao == TRUE){
echo “Conexão com o servidor efetuada com sucesso.”;
}else{
echo “Falha ao conectar no servidor.”;
}
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21

22. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Base de dados – MySQL – Acesso ao servidor
• Passo 3 – Fechar conexão com o Base de dados.
• Após a execução dos comandos no banco devemos fechar a conexão
com o servidor para poupar recursos do servidor.
• Para fechar a conexão com o banco utilizamos a função
mysql_close().
mysql_close(identificador de conexão);
• O comando mysql_close() retorna TRUE em caso de sucesso e
FALSE em caso de falha;
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22

23. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Base de dados – MySQL – Acesso ao servidor
• Exemplo
$conexao = mysql_connect(“host”,“Utilizador”, “senha”);
if ($conexao == TRUE){
echo “Conexão com o servidor efetuada com sucesso.”;
}else{
echo “Falha ao conectar no servidor.”;
}
if(mysql_close($conexao)){
echo “Conexão com o banco fechada com sucesso.”;
}else{
echo “Não havia conexão aberta ou a conexão já tinha sido fechada.”;
}
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23

24. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Base de dados – MySQL – Manipulação de
Dados
• Passo 2 – Executar comandos na Base de dados.
• Após conectar no servidor de Base de dados, devemos especificar
qual base de dados será utilizada. Isto é feito através da função
mysql_select_db();
mysql_select_db(nome do banco);
• A execução de comandos no MySQL é feita através de declarações
SQL.
• Após a definição do comando, podemos executar o comando no
banco através do método mysql_query();
mysql_query(declaração_sql);
• Além disso, ao executar o comando, esta função faz com que a
variável que estiver representando-a, armazene informações a
respeito da instrução SQL executada.
$variavel = mysql_query(declaração_sql);
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24

25. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Base de dados – MySQL – Manipulação de
Dados
• O tipo de informações armazenadas dependerão do tipo de instrução
SQL executada.
• Para outros tipos de consultas SQL, INSERT, UPDATE, DELETE, DROP,
etc, mysql_query() retorna TRUE em caso de sucesso ou FALSE em
caso de erro.
• Para comandos SELECT, SHOW, DESCRIBE ou EXPLAIN,
mysql_query() retorna um resource em caso de sucesso, ou FALSE em
caso de falha.
• Neste último caso, os resultados da instrução SQL podem ser acessadas
através de outras funções da biblioteca mysql.
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26. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Base de dados – MySQL – Manipulação de
Dados
• O recurso de resultado retornado pode ser passado para
mysql_fetch_array(), e outras funções para manipular tabelas de
resultados, para acessar os dados retornados.
• Use mysql_num_rows(query) para obter quantas linhas foram retornadas
para um comando SELECT ou mysql_affected_rows(link resource) para
obter quantas linhas foram afetadas por um comando DELETE, INSERT,
REPLACE, ou UPDATE.
• mysql_query() irá também falhar e retornar FALSE se o Utilizador não
tiver permissões para acessar a tabela(s) referenciadas pela consulta.
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27. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Base de dados – MySQL – Manipulação de
Dados
• Exemplo do uso de comando INSERT:
$conexao = mysql_connect(“host”,“Utilizador”, “senha”);
$banco = mysql_select_db(“banco”);
$sql = “INSERT INTO FUNCIONARIO (MATRICULA, NOME) VALUES (1,’FULANO’)”;
$resultado = mysql_query($sql, $conexao);
if ($resultado){
$numeroRegistros = mysql_affected_rows($conexao);
echo “Comando executado com sucesso. ”;
echo “Foram afetados $numeroRegistros registros.”;
}else{
echo “Falha ao executar comando.”;
}
mysql_close($conexao);
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28. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Base de dados – MySQL – Manipulação de
Dados
• No caso de comandos que retornam informações da BD, podemos utilizar algumas
funções para extrair as informações armazenadas no recurso de resultado. São
elas:
• mysql_fetch_row – recupera o próximo registro em forma de array de índices numéricos.
• mysql_fetch_assoc – recupera o próximo registro em forma de array de índices
associativos, onde cada índice é o nome do campo na tabela.
• mysql_fecth_array – recupera o próximo registro em forma de array de índices numéricos
e associativos, ao mesmo tempo.
• mysql_fecth_object - recupera o próximo registro em forma de objeto.
• Todas elas necessitam como parâmetro do recurso contendo o resultado do
comando mysql_query()
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29. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Base de dados – MySQL – Manipulação de
Dados
• Exemplo do uso de comando SELECT:
$conexao = mysql_connect(“Utilizador”, “senha”, “host”);
$banco = mysql_select_db(“banco”);
$sql = “SELECT matricula, nome, salario FROM funcionario”;
$resultado = mysql_query($sql, $conexao,);
if ($resultado){
while ($registro = mysql_fecth_array($resultado)){
echo “Matricula: ”.$registro[”matricula”];
echo “Nome: ”. $registro[”nome”];
echo “Salário: ”. $registro[”salario”];
}
}
mysql_close($conexao);
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30. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Herança
• Permite reutilizar uma
classe ou expandir para
diferente proposito.
• A classe filho herda os
métodos e propriedades
da classe pai.
• Construtores ???
<?php
Class cao extends mamifero {
...
}
?>
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30

31. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Web Development Training
MVC
Model – View - Controller
Definição
Model
Controller
View
Vantagem
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32. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
O que é MVC?
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"MVC é um padrão de arquitetura que descreve uma
forma de estruturar nossa aplicação e as
responsabilidades e interações para cada parte nessa
estrutura."
32

33. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
MVC
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34. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Model (Modelo)
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O modelo é o de dados e as regras aplicáveis a
esses dados, que representam conceitos geridos
por uma aplicação
34

35. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Controller (Controlador)
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O controlador gere as solicitações do utilizador (recebidos como
HTTP GET ou POST solicitados quando o utilizador clica em
elementos GUI para executar ações)
Sua principal função é chamar e coordenar os recursos
necessários / objetos necessários para executar a ação do
utilizador
35

36. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Exemplo - Controller (Controlador)
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<?php
class BooksController extends AppController {
function list($category) {
$this->set('books', $this->Book-
>findAllByCategory($category));
}
function add() { ... ... }
function delete() { ... ... }
... ... } ?>
36

37. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
View
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View oferece maneiras diferentes de apresentar os dados
recebidos a partir do modelo.
<table> <tr> <th>Title</th> <th>Author</th>
<th>Price</th> </tr>
<?php foreach ($books as $book): ?> <tr> <td> <?
php echo $book['Book']['title']; ?> </td> <td> <?
php echo $book['Book']['author']; ?> </td> <td>
<?php echo $book['Book']['price']; ?> </td> </tr>
<?php endforeach; ?>
</table>
37

38. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
MVC
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39. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Vantagem
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"A vantagem mais óbvia que ganhamos usando MVC é uma clara
separação de apresentação (a interface com o utilizador) e lógica
da aplicação.”
39

40. The image
part with
relationshi
p ID rId14
was not
found in
the file.
The image part with relationship ID rId14 was not found in
the file.
Para proxima semana
• Dar vida aos formularios…
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