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