The PHP 5.4 Features You Will Actually Use

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1 The PHP 5.4 Features You Will Actually Use

2 About Me Lorna Jane Mitchell PHP Consultant/Developer Author of PHP Master (Sitepoint) and PHP Web Services (O Reilly) Website:

3 About PHP 5.4 New features Traits Built-in webserver New array syntax and dereferencing And more! Removed some nonsense This talk covers the best bits* * an entirely subjective selection

4 Start With The Easy Bit

5 New Array Syntax

6 Array Syntax We had this: $game[] = 'paper'; $game[] = 'scissors'; $game[] = 'stone'; print_r($game); $game[0] = 'paper'; $game[1] = 'scissors'; $game[2] = 'stone'; print_r($game);

7 Array Syntax Or this: $game = array('stone', 'paper', 'scissors'); print_r($game); $game = array(0 => 'stone', 1 => 'paper', 2 => 'scissors'); print_r($game);

8 Array Syntax Now we can do: $game = ['scissors', 'stone', 'paper']; print_r($game); $game = [0 => 'scissors', 1 => 'stone', 2 => 'paper']; print_r($game);

9 Array Dereferencing

10 Array Dereferencing When an array is returned, immediately pick an element from it function getlist() { return ['Grumpy', 'Sleepy', 'Bashful', 'Doc']; } // grab first item from list $item = getlist()[0]; echo $item; // Grumpy;

11 PHP 5.4 Stealth Feature

12 PHP 5.4 Is Faster

13 PHP Versions Speed Comparison Benchmarks made using: Newly-compiled vanilla PHP binaries Thebench.php script in the PHP source tree A rather average laptop 10 runs per version, then averaged

14 PHP Versions Speed Comparison

15 PHP Versions Speed Comparison

16 PHP Versions Speed Comparison

17 PHP Versions Speed Comparison

18 Traits

19 Traits Re-usable groups of methods, in languages with single inheritance. Declare atrait, it looks like a class Add the trait to your class using theuse keyword Methods are available!

20 Trait Example From ZF2 namespace Zend\EventManager; trait ProvidesEvents { public function seteventmanager(eventmanagerinterface $events) { $identifiers = array( CLASS, get_called_class()); $events->setidentifiers($identifiers); $this->events = $events; return $this; } } public function geteventmanager() { if (!$this->events instanceof EventManagerInterface) { $this->seteventmanager(new EventManager()); } return $this->events; }

$events->setidentifiers($identifiers); $this->events = $events; return $this; } } public function

21 Using Traits Apply it like this: class Magic { use \Zend\EventManager\ProvidesEvents; } // more magical things $magic = new Magic(); $magic->seteventmanager(new FancyEventManager());

22 Other Trait Trivia They can be aliased when used

23 Other Trait Trivia They can be aliased when used There are rules about resolving naming clashes

24 Other Trait Trivia They can be aliased when used There are rules about resolving naming clashes Traits can include properties

25 Other Trait Trivia They can be aliased when used There are rules about resolving naming clashes Traits can include properties Traits can include abstract methods

26 Other Trait Trivia They can be aliased when used There are rules about resolving naming clashes Traits can include properties Traits can include abstract methods Traits can themselves make use of other traits

27 Built In Webserver

28 Built In Webserver Built in application server for PHP 5.4 Simple Lightweight Development use only From the manual: "Requests are served sequentially."

29 Webserver Examples Start a simple server on a port number of your choice php -S localhost:8080

30 Webserver Examples Change the hostname: php -S dev.project.local:8080

31 Webserver Examples Specify the docroot php -S localhost:8080 -t /var/www/superproject Specify which php.ini to use (default: none) php -S localhost:8080 -c php.ini-development

32 Webserver Examples Use a routing file (example from <?php if (file_exists( DIR. '/'. $_SERVER['REQUEST_URI'])) { return false; // serve the requested resource as-is } else { include_once 'index.php'; } routing.php php -S localhost:8080 routing.php The webserver runsrouting.php before entering the requested script. This example serves any existing resource, or routes toindex.php

33 Session Upload Progress

34 Session Upload Progress File upload progress, written to the session at intervals Useful for user feedback, e.g. shiny new HTML5 progress bars!

35 Tracking Upload Progress User starts uploading file in the usual way <form name="upload" method="post" enctype="multipart/form-data"> <input type="hidden" name="<?php echo ini_get("session.upload_progress.name");?>" value="123" /> File: <input type="file" id="file1" name="file1" /> <input type="submit" value="start upload" /> </form>

36 Tracking Upload Progress In a separate file, we can check the relevant session variables to see how the upload is going: array(1) { ["upload_progress_123"]=> array(5) { ["start_time"]=> int( ) ["content_length"]=> int( ) ["bytes_processed"]=> int( ) ["done"]=> bool(false) ["files"]=> array(1) { [0]=> array(7) {... } } } }

37 Anonymous Functions, invoke and the Callable Typehint

38 Typehinting We can typehint in PHP, on: Classes Interfaces Arrays

39 Typehinting We can typehint in PHP, on: Classes Interfaces Arrays... and now Callable Callable denotes anything that can be called - e.g. a closure, callback or invokable object

40 Anonymous Functions Literally functions with no name More convenient thancreate_function() Example: $ping = function() { echo "ping!"; }; $ping(); // ping!

41 Callable Examples function sparkles(callable $func) { $func(); return "fairy dust"; } $ping = function() { echo "ping!"; }; $pong = "pong"; echo sparkles($ping); // ping!fairy dust echo sparkles($pong); Catchable fatal error: Argument 1 passed to sparkles() must be callable, string given, called in /home/lorna/.../callable.php on line 16 and defined in /home/lorna/.../callable.php on line 10

42 Callable Examples function sparkles(callable $func) { $func(); return "fairy dust"; } class Butterfly { public function invoke() { echo "flutter"; } } $bee = new Butterfly(); echo sparkles($bee); // flutterfairy dust

43 JsonSerializable

44 Sleep and Wakeup When weserialize() orunserialize() an object, PHP provides "magic methods" for us to hook into (this isn t new): sleep() to specify which fields should be serialized wakeup() to perform any operations needed to complete an object when it is unserialized This gives us the same feature for when we JSON something

45 The JsonSerializable Interface From the manual: JsonSerializable { abstract public mixed jsonserialize () } Objects implementing thejsonserializable interface can control how they are represented in JSON when they are passed tojson_encode()

46 JsonSerializable Example class gardenobject implements JsonSerializable { public function jsonserialize() { $data[] = $this->flowers; $data[] = $this->fruit; return $data; } } $garden = new gardenobject(); $garden->flowers = array("clematis", "geranium", "hydrangea"); $garden->herbs = array("mint", "sage", "chives", "rosemary"); $garden->fruit = array("apple", "rhubarb"); echo json_encode($garden); [["clematis","geranium","hydrangea"],["apple","rhubarb"]]

47 No More Nonsense

48 Removed Features register_globals register_long_arrays safe_mode magic_quotes allow_call_time_pass_reference y2k_compliance

49 Upgrading to PHP 5.4 Turn one_deprecated in PHP 5.3 Warns when you use features which are gone in 5.4 Test with the PHP 5.4 webserver

50 PHP 5.4

51 Did I Mention it s Faster?

52 The PHP 5.4 Features I ll Actually Use Short array syntax Traits Built in webserver Upload progress Callable JsonSerializable

53 Questions?

54 Thanks! Resources all here: Web:

The PHP 5.4 Features You Will Actually Use

The PHP 5.4 Features You Will Actually Use About Me Lorna Jane Mitchell PHP Consultant/Developer Author of PHP Master Twitter: @lornajane Website: http://lornajane.net 2 About PHP 5.4 New features Traits