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

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• Lorna Jane Mitchell
• PHP Consultant/Developer
• Author of PHP Master
• Twitter: @lornajane
• Website: http://lornajane.net

About PHP 5.4

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• New features
• Traits
• Built-in webserver
• New array syntax
• And more!
• Removed some nonsense
• This talk covers the best bits*

* an entirely subjective selection

Start With The Easy Bit

New Array Syntax

Array Syntax

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We had this:

$game[] = 'paper'; $game[] = 'scissors'; $game[] = 'stone'; print_r($game); $game[0] = 'paper'; $game[1] = 'scissors'; $game[2] = 'stone'; print_r($game);

Array Syntax

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Or this:

$game = array('stone', 'paper', 'scissors'); print_r($game); $game = array(0 => 'stone', 1 => 'paper', 2 => 'scissors'); print_r($game);

Array Syntax

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Now we can do:

$game = ['scissors', 'stone', 'paper']; print_r($game); $game = [0 => 'scissors', 1 => 'stone', 2 => 'paper']; print_r($game);

PHP 5.4 Stealth Feature

PHP 5.4 Is Faster

PHP Versions Speed Comparison

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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

PHP Versions Speed Comparison

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PHP Versions Speed Comparison

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PHP Versions Speed Comparison

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PHP Versions Speed Comparison

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Traits

Traits

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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!

Simplest Trait Example

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<?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();

Other Trait Trivia

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• 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

Built In Webserver

Built In Webserver

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Built in application server for PHP 5.4

• Simple
• Lightweight
• Development use only

From the manual: "Requests are served sequentially."

http://lrnja.net/NQoXsh

Webserver Examples

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Start a simple server on a port number of your choice

php -S localhost:8080

http://localhost:8080

Webserver Examples

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Change the hostname:

php -S dev.project.local:8080

http://dev.project.local:8080

Webserver Examples

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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

Webserver Examples

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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

Session Upload Progress

Session Upload Progress

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

Tracking Upload Progress

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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>

Tracking Upload Progress

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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) { ... } } } }

Callable Typehint

Typehinting

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We can typehint in PHP , on:

• Classes
• Interfaces
• Arrays

Typehinting

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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

Callable Examples

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$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

Callable Examples

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

JsonSerializable

Sleep and Wakeup

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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
• bject when it is unserialized

This gives us the same feature for when we JSON something

The JsonSerializable Interface

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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()

JsonSerializable Example

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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"]}

PHP 5.4

Did I Mention it’s Faster?

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The PHP 5.4 Features I’ll Actually Use

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• Short array syntax
• Traits
• Built in webserver
• Upload progress
• Callable
• JsonSerializable

Questions?

Resources

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

Thanks!

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@lornajane

http://lornajane.net