Running PHP on NGINX – Tips and Tricks for High Performance Websites 

by Harald Zeitlhofer

Surviving the next Upgrade 

by Stefan Priebsch

How much does it cost

Frameworks spares you from reinventing solutions others already spent time and effort on implementing

At some point, however, a framework upgrade is in order

How can we take advantage of existing code, without coupling our code too tightly to the framework

Your app

Your app & dependencies

What changes?

Business requirements

APIs

Composer dependencies

• avoid them

• make them explicit

• Dependency Disguise as anti-pattern

Never ever rely on somebody else's interfaces

source http://code.tutsplus.com/

The Dependency Inversion Principle

Create Your own interface + adapter

Loose coupling works great if You are in charge of the interfaces

Composer Best Practices 

by Jordi Boggiano

Five weird Tricks to become a better Developer 

by Jordi Boggiano

Modernize your PHP Code 

by Anna Filina

Closures 

<?php

$input = array(1, 2, 3, 4, 5);
$output = array_filter($input, function ($v) {
    return $v > 2;
});

$max_comparator = function ($v) {
    return $v > 2;
};

$input = array(1, 2, 3, 4, 5);
$output = array_filter($input, $max_comparator);

Traits 

<?php

trait MyTrait
{
    public function doSomething($var)
    {
        return $var . ' does something';
    }
}

class BaseController extends Controller
{
    use MyTrait;
    
    public function indexAction()
    {
        $this->doSomething('var');
    }
}

Finally 

<?php

function inverse($x)
{
    if (!$x) {
        throw new Exception('Division by zero.');
    }
    
    return 1 / $x;
}

try {
    echo inverse(5);
} catch (Exception $e) {
    echo 'Caught exception: ' . $e->getMessage();
} finally {
    echo 'This is the last echo';
}

Short array syntax 

<?php

$array = array(
    'foo' => 'bar',
    'bar' => 'foo'
);

// as of PHP 5.4
$array = [
    'foo' => 'bar',
    'bar' => 'foo'
];

Password functions 

<?php

$hash = password_hash('rasmuslerdorf', PASSWORD_DEFAULT);

if (password_verify('rasmuslerdorf', $hash)) {
    echo 'Password is valid!';
} else {
    echo 'Invalid password.';
}

Foreach with list 

<?php

$items = [
    ['a', 'b', 'c', 'd'],
    [1, 2, 3, 4]
];

foreach ($items as list($var1, $var2, $var3, $var4)) {
    //
}

Argument unpacking 

<?php

function add($a, $b, $c)
{
    return $a + $b + $c;
}

// a very simple call
add(1, 2, 6);

// as of PHP 5.6
$numbers = [1, 2, 3];
add(...$numbers);