PHP 5.4

Federico Lozada Mosto
mostofreddy@gmail.com
@mostofreddy
http://www.mostofreddy.com.ar

PHP 5.4
Rocks!

40 %
más rápido

empty_loop 0.369 empty_loop 0.320 empty_loop 0.196
func() 1.318 0.948 func() 0.748 0.428 func() 0.654 0.458
undef_func() 1.635 1.265 undef_func() 0.760 0.440 undef_func() 0.599 0.403
int_func() 1.068 0.698 int_func() 0.703 0.384 int_func() 0.682 0.486
$x = self::$x 0.878 0.509 $x = self::$x 0.685 0.366 $x = self::$x 0.408 0.212
self::$x = 0 0.818 0.448 self::$x = 0 0.764 0.445 self::$x = 0 0.487 0.291
isset(self::$x) 0.843 0.474 isset(self::$x) 0.639 0.319 isset(self::$x) 0.484 0.288
empty(self::$x) 0.879 0.509 empty(self::$x) 0.690 0.370 empty(self::$x) 0.379 0.184
$x = Foo::$x 1.107 0.737 $x = Foo::$x 0.987 0.667 $x = Foo::$x 0.371 0.176
Foo::$x = 0 1.054 0.685 Foo::$x = 0 1.084 0.765 Foo::$x = 0 0.351 0.155
isset(Foo::$x) 1.041 0.672 isset(Foo::$x) 0.928 0.608 isset(Foo::$x) 0.322 0.126
empty(Foo::$x) 1.051 0.682 empty(Foo::$x) 0.970 0.651 empty(Foo::$x) 0.346 0.150
self::f() 1.412 1.043 self::f() 1.085 0.765 self::f() 0.622 0.426
Foo::f() 1.725 1.355 Foo::f() 1.210 0.890 Foo::f() 0.597 0.401
$x = $this->x 0.849 0.479 $x = $this->x 0.752 0.433 $x = $this->x 0.394 0.198
$this->x = 0 0.976 0.607 $this->x = 0 0.722 0.402 $this->x = 0 0.528 0.332
$this->x += 2 0.824 0.455 $this->x += 2 0.632 0.312 $this->x += 2 0.393 0.197
++$this->x 0.704 0.335 ++$this->x 0.587 0.267 ++$this->x 0.356 0.161
--$this->x 0.722 0.352 --$this->x 0.640 0.320 --$this->x 0.357 0.161
$this->x++ 0.737 0.367 $this->x++ 0.633 0.314 $this->x++ 0.381 0.185
$this->x-- 0.736 0.366 $this->x-- 0.631 0.311 $this->x-- 0.396 0.200
isset($this->x) 0.814 0.445 isset($this->x) 0.684 0.365 isset($this->x) 0.418 0.222
empty($this->x) 0.816 0.446 empty($this->x) 0.662 0.342 empty($this->x) 0.426 0.230
$this->f() 1.418 1.048 $this->f() 0.937 0.617 $this->f() 0.733 0.537
$x = Foo::TEST 0.381 0.011 $x = Foo::TEST 0.555 0.235 $x = Foo::TEST 0.395 0.199
new Foo() 2.692 2.323 new Foo() 2.393 2.074 new Foo() 1.360 1.164
$x = TEST 0.674 0.305 $x = TEST 0.596 0.276 $x = TEST 0.284 0.089
$x = $_GET 0.718 0.349 $x = $_GET 0.546 0.226 $x = $_GET 0.404 0.208
$x = $GLOBALS['v'] 1.018 0.648 $x = $GLOBALS['v'] 0.856 0.536 $x = $GLOBALS['v'] 0.576 0.380
$x = $hash['v'] 0.788 0.418 $x = $hash['v'] 0.592 0.272 $x = $hash['v'] 0.440 0.244
$x = $str[0] 1.291 0.922 $x = $str[0] 0.839 0.520 $x = $str[0] 0.606 0.410
------------------------ ------------------------ ------------------------
PHP 5.2.9: 31.355'' PHP 5.3: 24.830'' PHP 5.4: 14.946''

Funciones
Palabras recervadas
Features

hex2bin()
trait http_response_codes()
callable get_declared_traits()
insteadof getimagesizefromstring()
trait_exists()
header_register_callback()
class_uses()
session_status()
session_register_shutdown()
mysqli_error_list()
mysqli_stmt_error_list()
etc...

Formato para
números binarios
<?php
$nroBinario = 0b10;
echo $nroBinario.PHP_EOL;
//return 2

Interfaz JsonSerializable

<?php
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"]}

Sesiones
- session_status
- session_handler

Session Status
<?php
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

Interfaz de Handler de Sessiones Nativa
S
N TE
<?php
A $obj = new MySessionHandler;
session_set_save_handler(
array($obj, "open"),
array($obj, "close"),
array($obj, "read"),
array($obj, "write"),
array($obj, "destroy"),
array($obj, "gc")
);

Interfaz de Handler de Sessiones Nativa
R A
O MySessionHandler
H class
<?php
A 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();

High Precision Timer

<?php
// PHP < 5.4
$start = microtime(1);
sleep(2);
echo "time: ", (microtime(1) - $start);
//return time: 2.0010209083557
// PHP >= 5.4
sleep(2);
$start = $_SERVER['REQUEST_TIME_FLOAT'];
echo "time: ".(microtime(1) - $start);
//return time: 2.0010209083557

Clases
&
Closures
&
Arrays

Acceso a metodos en la instanciación
<?php
class Test
{
public function foo(){ return 'foo';}
}
echo (new Test())->foo();
//return foo

Callable Type Hint
<?php
class Test {
public function foo() {return 'foo';}
static public function bar() {return 'bar';}
public function __invoke(){return 'invoke';}
}
function run(callable $func) {
echo $func();
}
$o = new Test;
$var = 'excepcion';
run(['Test', 'bar']); //return bar
run([$o, 'foo']); //return foo
run($o); //return invoke
run($var); //Catchable fatal error: Argument
//1 passed to run() must be callable

Closures & $this
<?php
class Test {
protected $name = 'Mostofreddy';
public function getName() {
$callback = function() {return $this->name;};
return $callback;
}
}
$o = new Test;
$func = $o->getName();
echo $func(); //return Mostofreddy

Closure::bindTo
<?php
class A {
function __construct($val) {$this->val = $val;}
function getClosure() {
return function() { return $this->val; };
}
}
$ob1 = new A(1);
$ob2 = new A(2);
$func = $ob1->getClosure();
echo $func(); //return 1
$func = $func->bindTo($ob2);
echo $func(); //return 2

Class::{expr}() syntax
<?php
class Test {
static public function foo(){ return "method foo";}
static public function bar(){ return "method bar";}
}
$method = true;
echo Test::{($method)?'foo':'bar'}();
//return method foo

Sintaxis de array compactos
//return
array(6) {
[0]=>
<?php int(0)
$array = [0, 1, 2, 3, 4]; [1]=>
var_dump($array); int(1)
[2]=>
int(2)
[3]=>
int(3)
[4]=>
int(4)
}

Array por referencia (Array Deferencing)
<?php
$txt = "Erase una vez";
echo explode(" ", $txt)[0]; //return Erase
echo PHP_EOL;
function getName() {
return array(
'usuario' => array(
'nombre'=>'Federico'
)
);
}
echo getName()['usuario']['nombre']; //return Federico
echo PHP_EOL;

Built-in web server

~/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.
TIP: para usarlo desde una virtual hay
que poner 0.0.0.0

~/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

TRAITS

Ejemplo simple
<?php
trait Log {
public function addLog($m) {echo 'LOG: '.$m;}
}
class Test {
use Log;
public function foo() {
$this->addLog('foo');
}
}
$obj = new Test;
$obj->foo();
//return LOG: foo

Multiple Traits
<?php
trait Log {
public function addLog($m) {echo 'LOG: '.$m;}
}
trait Mensaje {
public function holaMundo() {return "Hola Mundo!";}
}
class Test {
use Log, Mensaje;
public function foo() {
$this->addLog($this->holaMundo());
}
}
$obj = new Test;
$obj->foo();
//return LOG: Hola Mundo!

Traits: Composicion
<?php
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

Traits: Herencia
<?php
trait Hello {
public function foo () {return "traits";}
public function foo_1() {
return $this->foo()." - ".parent::foo();
}
}
class Base {
public function foo() {return 'base';}
}
class Test extends Base {
use Hello;
public function foo() {return 'Test';}
}
$o = new Test;
echo $o->foo(); //return Test
echo $o->foo_1(); //return Test - base

Traits: Resolviendo conflictos
<?php
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();

Traits: Resolviendo conflictos
<?php
trait Game {
public function play() {return "Play Game";}
}
trait Music {
public function play() {return "Play Music";}
}
class Player {
use Game, Music;
}
$o = new Player; PHP no resuelve el
echo $o->play(); conflicto automáticamente
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

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

Traits: Resolviendo conflictos - rename
<?php
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

Traits: Atributos
<?php
trait Usuario {
protected $nombre;
public function getName(){ return $this->nombre;}
}
class Empleado {
use Usuario;
public function setName($nombre) {
$this->nombre = $nombre;
}
}
$o = new Empleado;
$o->setName('Federico');
echo $o->getName();
//return Federico

ini options
Safe mode and all related options
magic_quotes_gpc
magic_quotes_runtime
magic_quotes_sybase
register_globals
register_long_arrays
define_syslog_variables
y2k_compliance

Functions & Extensiones
session_is_registered()
session_register()
session_unregister()
define_syslog_variables()
get_magic_quotes_gpc && get_magic_quotes_runtime
siempre devuelven false
import_request_variables()
mysqli_bind_param()
mysqli_bind_result()
mysqli_fetch()
Sqlite (no afecta a sqlite3)

Para los temerosos...
Tutorial para instalar de
manera fácil varias
versiones de PHP
en un mismo servidor:
http://bit.ly/HWJ5lW

¿Preguntas?