Phalcon 2 - PHP Brazil Conference

Jacksonfdam
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@jacksonfdam

Why?
• Use of frameworks has become mandatory in professional
development with PHP
• They offer a philosophy and organized structures to easily
maintain projects writing less code and making work more
fun

How PHP works?
1. PHP have dynamic and weak typing discipline
2. PHP is interpreted (not compiled)
3. Every time a script is loaded, should be interpreted by PHP
4. If a bytecode cache (like APC) isn’t used, syntax checking is
performed every time

How traditional php frameworks works?
1. Many files with classes and functions are read at every request made. Disk
reading is expensive in terms of performance
2. Modern frameworks use lazy loading technique (autoload) for load and execute
only code needed
3. Continuous loading/interpreting could be expensive and impact your
application performance
4. When you use a framework most of the code remain the same across
development. Why load and interpret it every time?

How a PHP C extension works?
1. C extensions are loaded together with PHP one time, on the web server
dispatch process
2. Classes and functions provided by the extension are ready to use for any
application
3. The code isn’t interpreted because it is compiled to a specific platform and
processor

What is Phalcon?
Phalcon is an open source, full stack framework for PHP 5
written as a C-extension, optimized for high performance. You
don’t need to learn or use the C language, since the
functionality is exposed as PHP classes ready for you to use.
Phalcon also is loosely coupled, allowing you to use its objects
as glue components based on the needs of your application.

How Phalcon works?
1. Components are loosely coupled. You may use the components you want
without depending on a full stack
2. Low-level optimizations provide the lowest overhead for MVC-based
applications
3. Interact with databases with maximum performance by using a C-language
ORM for PHP
4. Phalcon is directly engaged with PHP, so it can directly access internal
structures optimizing execution as well

Compare how Phalcon is faster than other
frameworks
Traditional Frameworks Phalcon
Interpretation of hundreds
or thousands of PHP lines
on each request
YES NO
Load dozens of files in
each request
YES NO
Checking the existence of
functions, methods,
classes, constants at each
request
YES NO
Low-level optimizations
gaining microseconds for
each request
NO YES

Framework Benchmark
<h1>Hello!</h1>

Test Environment
Operative System: Mac OS X Snow Leopard 10.6.8
• Web Server: Apache httpd 2.2.21
• PHP: 5.3.8 + APC 3.1.9 (Without Xdebug)
• CPU: 3.06 Ghz Intel Core 2 Duo
• Main Memory: 4GB 1067 MHz DDR3
• Hard Disk: 500GB SCSI/SAS HDD

Framework Benchmark
ab -n 1000 -c 5 http://localhost/bench/phalcon

Framework Total Requests/Average Time

Number of Interpreted Files per Request

Installation
To use phalcon on Windows you can download a DLL library. Edit your php.ini file
and then append at the end:
extension=php_phalcon.dll
Restart your webserver.

Requirements
Prerequisite packages are:
PHP >= 5.3 development resources
GCC compiler (Linux/Solaris)
Git (if not already installed in your system - unless you download the package
from GitHub and upload it on your server via FTP/SFTP)

Requirements
Specific packages for common platforms:
#Ubuntu
sudo apt-get install php5-dev libpcre3-dev gcc make php5-mysql
#Suse
sudo yast -i gcc make autoconf2.13 php5-devel php5-pear php5-mysql
#CentOS/RedHat/Fedora
sudo yum install php-devel pcre-devel gcc make
#Solaris
pkg install gcc-45 php-53 apache-php53

Compilation
git clone --depth=1 git://github.com/phalcon/cphalcon.git
cd cphalcon/build
sudo ./install

Configure
Add extension to your php configuration:
#Suse: Add this line in your php.ini
extension=phalcon.so
#Centos/RedHat/Fedora: Add a file called phalcon.ini in /etc/php.d/ with this content:
#Ubuntu/Debian: Add a file called 30-phalcon.ini in /etc/php.d/ with this content:
#Debian with php5-fpm: Add a file called 30-phalcon.ini in /etc/php5/fpm/conf.d/30-phalcon.ini with this content:
Restart the webserver.

Configure
Phalcon automatically detects your architecture, however, you can force the compilation for a specific architecture:
cd cphalon/build
sudo ./install 32bits
sudo ./install 64bits
sudo ./install safe

Mac OS X
On a Mac OS X system you can compile and install the extension from the source code:
Requirements
Prerequisite packages are:
PHP >= 5.3 development resources
XCode
#brew
brew tap homebrew/homebrew-php
brew install php53-phalcon
#MacPorts
sudo port install php53-phalcon

Installation on XAMPP
XAMPP is an easy to install Apache distribution containing MySQL, PHP and Perl.
Once you download XAMPP, all you have to do is extract it and start using it.
Below are detailed instructions on how to install Phalcon on XAMPP for Windows.
Using the latest XAMPP version is highly recommended.

XAMPP is always releasing 32 bit versions of Apache and PHP. You will need to
download the x86 version of Phalcon for Windows from the download section.
After downloading the Phalcon library you will have a zip file like the one shown
below:

Extract the library from the archive to get the Phalcon DLL:

Copy the file php_phalcon.dll to the PHP extensions. If you have installed XAMPP
in the c:xampp folder, the extension needs to be in c:xamppphpext

Edit the php.ini file, it is located at C:xamppphpphp.ini. It can be edited with Notepad or a
similar program. We recommend Notepad++ to avoid issues with line endings. Append at
the end of the file: extension=php_phalcon.dll and save it.

Restart the Apache Web Server from the XAMPP Control Center. This will load the new PHP
configuration.

Open your browser to navigate to
http://localhost. The XAMPP welcome
page will appear. Click on the link
phpinfo().
phpinfo() will output a significant amount
of information on screen about the current
state of PHP. Scroll down to check if the
phalcon extension has been loaded
correctly.
If you can see the phalcon version in the
phpinfo() output, congrats!, You are now
flying with Phalcon.

Creating a project
File structure
Phalcon does not impose a particular file structure for application development.
Due to the fact that it is loosely coupled, you can implement Phalcon powered
applications with a file structure you are most comfortable using.

Creating a project
For the purposes of this tutorial and as a starting point, we suggest the following
structure:
lab01/
app/
controllers/
models/
views/
public/
css/
img/
js/

Beautiful URLs
#/tutorial/.htaccess
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteRule ^$ public/ [L]
RewriteRule (.*) public/$1 [L]
</IfModule>
#/tutorial/.htaccess
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteRule ^$ public/ [L]
RewriteRule (.*) public/$1 [L]
</IfModule>

Bootstrap
<?php
try {
//Register an autoloader
$loader = new PhalconLoader();
$loader->registerDirs(array(
'../app/controllers/',
'../app/models/'
))->register();
//Create a DI
$di = new PhalconDIFactoryDefault();
//Setup the view component
$di->set('view', function(){
$view = new PhalconMvcView();
$view->setViewsDir('../app/views/');
return $view;
});
//Setup a base URI so that all generated URIs
include the "tutorial" folder
$di->set('url', function(){
$url = new PhalconMvcUrl();
$url->setBaseUri('/lab01//');
return $url;
});
//Handle the request
$application = new PhalconMvcApplication($di);
echo $application->handle()->getContent();
} catch(PhalconException $e) {
echo "PhalconException: ", $e->getMessage();
}

Creating a Controller
By default Phalcon will look for a controller named “Index”. It is the starting point when no controller or action has been passed in the
request. The index controller (app/controllers/IndexController.php) looks like:
<?php
class IndexController extends PhalconMvcController
{
public function indexAction()
{
echo "<h1>Hello!</h1>";
}
}

Creating a Controller
In our case (app/views/index/index.phtml):
<?php echo "<h1>Hello!</h1>";
Our controller (app/controllers/IndexController.php) now has an empty action definition:
<?php
class IndexController extends PhalconMvcController
{
public function indexAction()
{
}
}

Creating a Model
Phalcon brings the first ORM for PHP entirely written in C-language. Instead of
increasing the complexity of development, it simplifies it.
Before creating our first model, we need to create a database table outside of
Phalcon to map it to. A simple table to store registered users can be defined like this:
CREATE TABLE ùsers` (
ìd` int(10) unsigned NOT NULL AUTO_INCREMENT,
`name` varchar(70) NOT NULL,
èmail` varchar(70) NOT NULL,
PRIMARY KEY (ìd`)
);

Creating a Model
A model should be located in the app/models directory (app/models/Users.php). The
model maps to the “users” table:
<?php
class Users extends PhalconMvcModel
{
}

Setting a Database Connection
In order to be able to use a database connection and subsequently access
data through our models, we need to specify it in our bootstrap process. A
database connection is just another service that our application has that can
be used for several components:

Setting a Database Connection
<?php
try {
//Register an autoloader
$loader = new PhalconLoader();
$loader->registerDirs(array(
'../app/controllers/',
'../app/models/'
))->register();
//Create a DI
$di = new PhalconDIFactoryDefault();
/
/Setup the database service
$di->set('db', function(){
return new
PhalconDbAdapterPdoMysql(array(
"host" => "localhost",
"username" => "root",
"password" => "secret",
"dbname" => "test_db"
));
});
//Setup the view component
$di->set('view', function(){
$view = new PhalconMvcView();
$view->setViewsDir('../app/views/');
return $view;
});
//Setup a base URI so that all generated URIs include
the "tutorial" folder
$di->set('url', function(){
$url = new PhalconMvcUrl();
$url->setBaseUri('/tutorial/');
return $url;
});
//Handle the request
$application = new PhalconMvcApplication($di);
echo $application->handle()->getContent();
} catch(Exception $e) {
echo "PhalconException: ", $e->getMessage();
}

Volt: Template Engine
Volt is an ultra-fast and designer friendly templating language written in C for PHP. It
provides you a set of helpers to write views in an easy way. Volt is highly integrated
with other components of Phalcon, just as you can use it as a stand-alone component
in your applications.

Volt: Template Engine
Volt views are compiled to pure PHP code, so basically they save the effort of writing PHP code manually:
{# app/views/products/show.volt #}{% block last_products %}{% for product in products %}
* Name: {{ product.name|e }}
{% if product.status == "Active" %}
Price: {{ product.price + product.taxes/100 }}
{% endif %}{% endfor %}{% endblock %}

Phalcon Query Language (PHQL)
Phalcon Query Language, PhalconQL or simply PHQL is a high-level, object-oriented
SQL dialect that allows to write queries using a standardized SQL-like language.
PHQL is implemented as a parser (written in C) that translates syntax in that of the
target RDBMS.

In PHQL, we’ve implemented a set of features to make your access to databases
more secure:
• Bound parameters are part of the PHQL language helping you to secure your code
• PHQL only allows one SQL statement to be executed per call preventing injections
• PHQL ignores all SQL comments which are often used in SQL injections
• PHQL only allows data manipulation statements, avoiding altering or dropping
tables/databases by mistake or
externally without authorization
• PHQL implements a high-level abstraction allowing you to handle tables as models
and fields as class attributes

Creating PHQL Queries
PHQL queries can be created just by instantiating the class PhalconMvcModelQuery:
<?php
// Instantiate the Query
$query = new PhalconMvcModelQuery("SELECT * FROM Cars", $this->getDI());
// Execute the query returning a result if any
$cars = $query->execute();

Selecting Records
As the familiar SQL, PHQL allows querying of records using the SELECT statement
we know, except that instead of specifying tables, we use the models classes:
<?php
$query = $manager->createQuery("SELECT * FROM Cars ORDER BY Cars.name");
$query = $manager->createQuery("SELECT Cars.name FROM Cars ORDER BY Cars.name")

Result Types
Depending on the type of columns we query, the result type will vary. If you retrieve a
single whole object, then the
object returned is a PhalconMvcModelResultsetSimple. This kind of resultset is a
set of complete model objects:
<?php
$phql = "SELECT c.* FROM Cars AS c ORDER BY c.name";
$cars = $manager->executeQuery($phql);
foreach ($cars as $car) {
echo "Name: ", $car->name, "n";
}

Result Types
Or:
<?php
$cars = Cars::find(array("order" => "name"));
foreach ($cars as $car) {
echo "Name: ", $car->name, "n";
}

Inserting Data
Phalcon doesn’t only transform the PHQL statements into SQL. All events and
business rules defined in the model are executed as if we created individual objects
manually. Let’s add a business rule on the model cars.
A car cannot cost less than $ 10,000:

Inserting Data
<?php
use PhalconMvcModelMessage;
class Cars extends PhalconMvcModel
{
public function beforeCreate()
{
if ($this->price < 10000)
{
$this->appendMessage(new Message("A car cannot cost less than $ 10,000"));
return false;
}
}
}

Inserting Data
If we made the following INSERT in the models Cars, the operation will not be successful
because the price does not
meet the business rule that we implemented:
<?php
$phql = "INSERT INTO Cars VALUES (NULL, ’Nissan Versa’, 7, 9999.00, 2012, ’Sedan’)";
$result = $manager->executeQuery($phql);
if ($result->success() == false)
{
foreach ($result->getMessages() as $message)
{
echo $message->getMessage();
}
}

Updating Data
Updating rows is very similar than inserting rows. As you may know, the instruction to
update records is UPDATE.
When a record is updated the events related to the update operation will be executed
for each row.

Updating Data
<?php
// Updating a single column
$phql = "UPDATE Cars SET price = 15000.00 WHERE id = 101";
$manager->executeQuery($phql);
// Updating multiples columns
$phql = "UPDATE Cars SET price = 15000.00, type = ’Sedan’ WHERE id = 101";

Updating Data
<?php
// Using placeholders
$phql = "UPDATE Cars SET price = ?0, type = ?1 WHERE brands_id > ?2";
$manager->executeQuery($phql, array(
0 => 7000.00,
1 => ’Sedan’,
2 => 5
));

Updating Data
An UPDATE statement performs the update in two phases:
• First, if the UPDATE has a WHERE clause it retrieves all the objects that match
these criteria,
• Second, based on the queried objects it updates/changes the requested attributes
storing them to the relational database

Deleting Data
When a record is deleted the events related to the delete operation will be executed
for each row:
<?php
// Deleting a single row
$phql = "DELETE FROM Cars WHERE id = 101";
// Deleting multiple rows
$phql = "DELETE FROM Cars WHERE id > 100";

Deleting Data
When a record is deleted the events related to the delete operation will be executed
for each row:
<?php
// Using placeholders
$phql = "DELETE FROM Cars WHERE id BETWEEN :initial: AND :final:";
$manager->executeQuery(
$phql,
array(
’initial’ => 1,
’final’ => 100
)
);

Deleting Data
DELETE operations are also executed in two phases like UPDATEs.

Creating queries using the Query Builder
//Getting a whole set
$robots = $this->modelsManager->createBuilder()
->from(’Robots’)
->join(’RobotsParts’)
->orderBy(’Robots.name’)
->getQuery()
->execute();

Creating queries using the Query Builder
//Getting the first row
$robots = $this->modelsManager->createBuilder()
->from(’Robots’)
->join(’RobotsParts’)
->orderBy(’Robots.name’)
->getQuery()
->getSingleResult();

PHQL Lifecycle
Being a high-level language, PHQL gives developers the ability to personalize and
customize different aspects in order to suit their needs. The following is the life cycle
of each PHQL statement executed:
• The PHQL is parsed and converted into an Intermediate Representation (IR) which
is independent of the SQL implemented by database system
• The IR is converted to valid SQL according to the database system associated to
the model
• PHQL statements are parsed once and cached in memory. Further executions of
the same statement result in a slightly faster execution

Routing
The router component allows defining routes that are mapped to controllers or
handlers that should receive the request.
A router simply parses a URI to determine this information. The router has two
modes: MVC mode and match-only mode. The first mode is ideal for working with
MVC applications.

Routing
Defining Routes
PhalconMvcRouter provides advanced routing capabilities. In MVC mode, you can
define routes and map them to controllers/actions that you require. A route is defined
as follows:

Routing
An application can have many paths, define routes one by one can be a cumbersome task. In these cases we
can create more flexible routes:
<?php
// Create the router
$router = new PhalconMvcRouter();
//Define a route
$router->add(
"/admin/:controller/a/:action/:params",
array(
"controller" => 1,
"action" => 2,
"params" => 3,
)
);

Routing
Parameters with Names
The example below demonstrates how to define names to route parameters:
<?php
$router->add(
"/news/([0-9]{4})/([0-9]{2})/([0-9]{2})/:params",
array(
"controller" => "posts",
"action" => "show",
"year" => 1, // ([0-9]{4})
"month" => 2, // ([0-9]{2})
"day" => 3, // ([0-9]{2})
"params" => 4, // :params
)
);

Routing
HTTP Method Restrictions
When you add a route using simply add(), the route will be enabled for any HTTP method. Sometimes we can
restrict a route to a specific method, this is especially useful when creating RESTful applications:
<?php
// This route only will be matched if the HTTP method is GET
$router->addGet("/products/edit/{id}", "Products::edit");
// This route only will be matched if the HTTP method is POST
$router->addPost("/products/save", "Products::save");
// This route will be matched if the HTTP method is POST or PUT
$router->add("/products/update")->via(array("POST", "PUT"));

Routing
Not Found Paths
If none of the routes specified in the router are matched, you can define a group of paths to be used in this
scenario:
<?php
//Set 404 paths
$router->notFound(array(
"controller" => "index",
"action" => "route404"
));

DRY or DIE
Don't Repeat Yourself (DRY) or Duplication is Evil (DIE) is a principle of software development

KISS
KISS is an acronym for the design principle "Keep it simple, Stupid!".

SOLID
The principles when applied together intends to make it more likely that a programmer will create a system
that is easy to maintain and extend over time

SOCKETS
Ratchet - WebSockets for PHP
Ratchet is a loosely coupled PHP library providing developers with tools to create real time, bi-directional
applications between clients and servers over WebSockets.
http://socketo.me/

Background Jobs
Setup background jobs with Phalcon and Resque
https://github.com/doshimehul/phalcon-resque

RESTful
Phalcon REST provides a framework to build your own API upon, core functionalities include:
• Response formatting using Fractal's Transformer concept
(I got this concept from a book written by Phil Sturgeon)
• Authentication sessions using Json Web Token
• Access Control List using ACL class Phalcon provides
• Username and password authentication service
• Google authentication service
• Documentation generator based on docblock annotations
http://phalconist.com/olivierandriessen/phalcon-rest

RESTful
What is Fractal?
Fractal provides a presentation and transformation layer for complex data output, the like found in RESTful
APIs, and works really well with JSON. Think of this as a view layer for your JSON/YAML/etc.
When building an API it is common for people to just grab stuff from the database and pass it to
json_encode().
http://fractal.thephpleague.com/

Phalcon Micro-Start
Phalcon Micro-Start
A more practical example of the start of a Phalcon micro application
What's Included?
Basic page example
Partial views (Simple view engine)
URL with params
JSON return
Cached view
Redirect URL
https://github.com/james2doyle/phalcon-micro-start

Phalcon Docker
Docker Phalcon Apache2
Docker image based on Ubuntu 14.04 (trusty) with the latest stable Phalcon PHP Framework with apache 2.4
webserver installed.
https://github.com/szeist/docker-phalcon-apache2

Vagrant
Create and configure lightweight, reproducible, and portable development environments. Vagrant will change
how you work
http://www.vagrantup.com/

Puppet
Puppet is IT automation software that helps system administrators manage infrastructure throughout its
lifecycle, from provisioning and configuration to orchestration and reporting. Using Puppet, you can easily
automate repetitive tasks, quickly deploy critical applications, and proactively manage change, scaling from
10s of servers to 1000s, on-premise or in the cloud.
http://puppetlabs.com/puppet/what-is-puppet

PuPHPet
PuPHPet, an excellent GUI tool providing a simple wizard, which creates a Puppet-powered Vagrant
configuration, usable immediately.Originally started by Juan Treminio, PuPHPet makes creating
environments perfectly tailored for PHP developers on stacks such as {W,M,L}AMP dead simple.
https://puphpet.com/

Provisioning Phalcon
PuPHPet is an absolutely awesome tool in getting up and running with a development environment really
fast, and offers some very neat default options.
But what if we want to step outside the defaults? What if we'd, for example, like to install a PHP extension
that isn't part of the default distribution and doesn't exist in package managers?
http://docs.vagrantup.com/v2/provisioning/index.html

Phalconist
Resources catalog for Phalcon framework
http://phalconist.com/

Referencias
http://docs.phalconphp.com/en/
http://www.sitepoint.com/build-virtual-machines-easily-puphpet/
http://www.sitepoint.com/provisioning-phalcon-tools-vagrant/
http://www.sitepoint.com/php-rabbitmq-advanced-examples/

Thank you!
jacksonfdam@gmail.com
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Email Socialmedia
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@mafra.jackson
@jacksonfdam

Phalcon 2 - PHP Brazil Conference

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