Key features PHP 5.3 - 5.6

FEDERICO LOZADA MOSTO
Twitter: @mostofreddy
Web: mostofreddy.com.ar
Facebook: /mostofreddy
Linkedin: ar.linkedin.com/in/federicolozadamosto
Github: /mostofreddy

5.6.0 – 28/08/2014
5.5.0 – 20/06/2013
5.4.0 – 01/03/2012
5.3.0 – 30/07/2009
5.2.0 – 02/11/2006
5.1.0 – 24/11/2005
5.0.0 – 13/07/2004
Fuentes:
✓ http://php.net/eol.php
✓ http://php.net/supported-versions.php
!

<?php
namespace mostofreddylogger;
Class Logger {
…
}
?>
<?php
$log = new mostofreddyloggerLogger();
$log->info(“example of namespaces”);
//return example of namespaces
PHP 5.3

PHP 5.3
$sayHello = function() {
return "Hello world";
};
echo $sayHello();
//return Hello world
$text = "Hello %s";
$sayHello = function($name) use (&$text) {
return sprintf($text, $name);
};
echo $sayHello("phpbsas");
//return Hello phpbsas

PHP 5.4
class Freddy implements JsonSerializable
{
public $data = [];
public function __construct() {
$this->data = array(
'Federico', 'Lozada', 'Mosto'
);
}
public function jsonSerialize() {return $this->data;}
}
echo json_encode(new Freddy());
//return ["Federico","Lozada","Mosto"]
//PHP < 5.4
//{"data":["Federico","Lozada","Mosto"]}

PHP < 5.4
$obj = new MySessionHandler;
session_set_save_handler(
array($obj, "open"),
array($obj, "close"),
array($obj, "read"),
array($obj, "write"),
array($obj, "destroy"),
array($obj, "gc")
)

PHP 5.4
class MySessionHandler implements SessionHandlerInterface
{
public function open($savePath, $sessionName) {}
public function close() {}
public function read($id) {}
public function write($id, $data) {}
public function destroy($id) {}
public function gc($maxlifetime) {}
}
$handler = new MySessionHandler();
session_set_save_handler($handler, true);
session_start();

PHP 5.4
function status() {
$status = session_status();
if($status == PHP_SESSION_DISABLED) {
echo "Session is Disabled";
} else if($status == PHP_SESSION_NONE ) {
echo "Session Enabled but No Session values Created";
} else {
echo "Session Enabled and Session values Created";
}
}
status();
//return Session Enabled but No Session values Created
session_start();
status();
//return Session Enabled and Session values Created

PHP 5.4
$array = [0, 1, 2, 3, 4];
var_dump($array);
//return
array(6) {
[0]=> int(0)
[1]=> int(1)
[2]=> int(2)
[3]=> int(3)
[4]=> int(4)
}
Short syntax

PHP 5.4Array Deferencing
$txt = "Hello World";
echo explode(" ", $txt)[0];
//return Hello World
function getName() {
return [
'user' => array(
'name'=>'Federico'
)
];
}
echo getName()['user']['name'];
//return Federico

PHP 5.4
~/www$ php -S localhost:8080
PHP 5.4.0 Development Server started at Mon Apr
2 11:37:48 2012
Listening on localhost:8080
Document root is /var/www
Press Ctrl-C to quit.

PHP 5.4
~/www$ vim server.sh
#! /bin/bash
DOCROOT="/var/www"
HOST=0.0.0.0
PORT=80
ROUTER="/var/www/router.php"
PHP=$(which php)
if [ $? != 0 ] ; then
echo "Unable to find PHP"
exit 1
fi
$PHP -S $HOST:$PORT -t $DOCROOT $ROUTER

PHP 5.4
trait File {
public function put($m) {error_log($m, 3, '/tmp/log');}
}
trait Log {
use File;
public function addLog($m) {$this->put('LOG: '.$m);}
}
class Test {
use Log;
public function foo() { $this->addLog('test');}
}
$obj = new Test;
$obj->foo();
//return LOG: test

PHP 5.4
trait Game {
public function play() {return "Play Game";}
}
trait Music {
public function play() {return "Play Music";}
}
class Player {
use Game, Music;
}
$o = new Player;
echo $o->play();
Solving confict
PHP does not solve
conflicts automatically
PHP Fatal error: Trait method play has not been applied,
because there are collisions with other trait methods
on Player in /var/www/test/test_traits.php on line 10

PHP 5.4
trait Game {
public function play() {return "Play Game";}
}
trait Music {
public function play() {return "Play Music";}
}
class Player {
use Game, Music {
Game::play as gamePlay;
Music::play insteadof Game;
}
}
$o = new Player;
echo $o->play(); //return Play Music
echo $o->gamePlay(); //return Play Game

PHP < 5.5
function getLines($filename) {
if (!$handler = fopen($filename, 'r')) {
return;
}
$lines = [];
while (false != $line = fgets($handler)) {
$lines[] = $line;
}
fclose($handler);
return $lines;
}
$lines = getLines('file.txt');
foreach ($lines as $line) {
echo $line;
}

PHP 5.5
function getLines($filename) {
if (!$handler = fopen($filename, 'r')) {
return;
}
while (false != $line = fgets($handler)) {
yield $line;
}
fclose($handler);
}
foreach (getLines('file.txt') as $line) {
echo $line;
}

PHP with generators
Total time: 1.3618 seg
Memory: 256 k
PHP classic
Total time: 1.5684 seg
Memory: 2.5 M
PHP 5.5

PHP 5.5
opcache.enable=1
opcache.enable_cli=1
opcache.memory_consumption=128
opcache.interned_strings_buffer=8
opcache.max_accelerated_files=4000
opcache.revalidate_freq=60
opcache.fast_shutdown=1
Basic configuration

PHP 5.5
Advanced configuration for PHPUnit / Symfony /
Doctrine / Zend / etc
opcache.save_comments=1
opcache.enable_file_override=1
Functions
opcache_reset()
opcache_invalidate($filename, true)

PHP 5.5
password_get_info()
password_hash()
password_needs_rehash()
password_verify()
Funtions

PHP 5.5
$hash = password_hash($password, PASSWORD_DEFAULT);
//or
$hash = password_hash(
$password,
PASSWORD_DEFAULT, //default bcrypt
['cost'=>12, 'salt'=> 'asdadlashdoahdlkuagssa']
);
$user->setPass($hash);
$user->save();

PHP 5.5
$hash = $user->getPass();
if (!password_verify($password, $hash) {
throw new Exception('Invalid password');
}
if (password_needs_rehash($hash, PASSWORD_DEFAULT, ['cost' => 18]))
{
$hash = password_hash(
$password, PASSWORD_DEFAULT, ['cost' => 18]
);
$user->setPass($hash);
$user->save();
}

PHP 5.5
var_dump(password_get_info($hash1));
// prints
array(3) {
'algo' => int(1)
'algoName' => string(6) "bcrypt"
'options' => array(1) {
'cost' => int(12)
}
}

Variadic functions via …
&&
Argument unpacking via ...

PHP < 5.6
function ides() {
$cant = func_num_args();
echo "Ides count: ".$cant;
}
ides('Eclipse', 'Netbeas');
// Ides count 2

PHP 5.6
function ides($ide, ...$ides) {
echo "Ides count: ".count($ides);
}
ides (
'Eclipse', 'Netbeas', 'Sublime'
);
// Ides count 2

PHP 5.6
function sum(...$numbers) {
$acc = 0;
foreach ($numbers as $n) {
$acc += $n;
}
return $acc;
}
echo sum(1, 2, 3, 4);
// 10

PHP 5.6
function add($a, $b) {
return $a + $b;
}
echo add(...[1, 2]);
// 3
$a = [1, 2];
echo add(...$a);
// 3

PHP 5.6
function showNames($welcome, Person ...$people) {
echo $welcome.PHP_EOL;
foreach ($people as $person) {
echo $person->name.PHP_EOL;
}
}
$a = new Person('Federico');
$b = new Person('Damian');
showNames('Welcome: ', $a, $b);
//Welcome:
//Federico
//Damian

PHP 5.6
class C {
private $prop;
public function __construct($val) {
$this->prop = $val;
}
public function __debugInfo() {
return [
'propSquared' => $this->prop ** 2
];
}
}
var_dump(new C(42));
// object(C)#1 (1) {
["propSquared"]=> int(1764)
}

FEDERICO LOZADA MOSTO
TW: @mostofreddy
Web: mostofreddy.com.ar
FB: mostofreddy
In: ar.linkedin.com/in/federicolozadamosto
Git: mostofreddy
Thanks!

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