The PHP 5.4 Features You Will Actually Use About Me Lorna Jane - PowerPoint PPT Presentation

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 • Built-in webserver • New array syntax • And more! • Removed some nonsense • This talk covers the best bits* * an entirely subjective selection 3

Start With The Easy Bit

New Array Syntax

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); 6

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

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

PHP 5.4 Stealth Feature

PHP 5.4 Is Faster

PHP Versions Speed Comparison Benchmarks made using: • Newly-compiled vanilla PHP binaries • The bench.php script in the PHP source tree • A rather average laptop • 10 runs per version, then averaged 11

PHP Versions Speed Comparison 12

PHP Versions Speed Comparison 13

PHP Versions Speed Comparison 14

PHP Versions Speed Comparison 15

Traits

Traits Re-usable groups of methods, in languages with single inheritance. • Declare a trait , it looks like a class • Add the trait to your class using the use keyword • Methods are available! 17

Simplest Trait Example <?php trait Audit { public function getAuditTrail() { return "nothing changed"; } } class Princess { use Audit; // General princess class description: // soldering, tree climbing, the usual } $daisy = new Princess(); echo $daisy->getAuditTrail(); 18

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 19

Built In Webserver

Built In Webserver Built in application server for PHP 5.4 • Simple • Lightweight • Development use only From the manual: "Requests are served sequentially." http://lrnja.net/NQoXsh 21

Webserver Examples Start a simple server on a port number of your choice php -S localhost:8080 http://localhost:8080 22

Webserver Examples Change the hostname: php -S dev.project.local:8080 http://dev.project.local:8080 23

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 24

Webserver Examples Use a routing file (example from http://lrnja.net/LigI4U ) <?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 runs routing.php before entering the requested script. This example serves any existing resource, or routes to index.php 25

Session Upload Progress

Session Upload Progress File upload progress, written to the session at intervals Useful for user feedback, e.g. shiny new HTML5 progress bars! 27

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> 28

Tracking Upload Progress In a separate file, we can check the relevant session variables to see how the upload is going: http://lrnja.net/Lhs7jJ array(1) { ["upload_progress_123"]=> array(5) { ["start_time"]=> int(1340542011) ["content_length"]=> int(1529158981) ["bytes_processed"]=> int(1386660589) ["done"]=> bool(false) ["files"]=> array(1) { [0]=> array(7) { ... } } } } 29

Callable Typehint

Typehinting We can typehint in PHP , on: • Classes • Interfaces • Arrays 31

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 31

Callable Examples $ping = function() { echo "ping!"; }; $pong = "pong"; function sparkles(Callable $func) { $func(); return "fairy dust"; } echo sparkles($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 32

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 33

JsonSerializable

Sleep and Wakeup When we serialize() or unserialize() 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 35

The JsonSerializable Interface From the manual: JsonSerializable { abstract public mixed jsonSerialize () } Objects implementing the JsonSerializable interface can control how they are represented in JSON when they are passed to json_encode() 36

JsonSerializable Example class gardenObject implements JsonSerializable { public function jsonSerialize() { unset($this->herbs); return $this; } } $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); {"flowers":["clematis","geranium","hydrangea"],"fruit" :["apple","rhubarb"]} 37

PHP 5.4

Did I Mention it’s Faster? 39

The PHP 5.4 Features I’ll Actually Use • Short array syntax • Traits • Built in webserver • Upload progress • Callable • JsonSerializable 40

Questions?

Resources All in a single bundle for you: http://lrnja.net/KOouXv 42

Thanks! @lornajane http://lornajane.net 43