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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Modern PHP</title>
<meta name="description" content="Modern PHP">
<meta name="author" content="Rasmus Lerdorf">
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, minimal-ui">
<link rel="stylesheet" href="/reveal.js/css/reveal.css">
<link rel="stylesheet" href="/reveal.js/css/theme/white.css" id="theme">
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<script>
var link = document.createElement( 'link' );
link.rel = 'stylesheet';
link.type = 'text/css';
link.href = window.location.search.match( /print-pdf/gi ) ? 'css/print/pdf.css' : 'css/print/paper.css';
document.getElementsByTagName( 'head' )[0].appendChild( link );
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<link rel="stylesheet" href="/styles/xcode.css">
<!-- Override a few styles -->
<style>
/*
Not actually sure why this block isn't being picked up from the syntax highlight css
If you change the syntax highlight theme, copy the first block here
*/
.reveal pre {
width: 100%;
}
.reveal pre code {
display: block;
max-height: 600px;
overflow-x: auto;
padding: 0.5em;
line-height: 125%;
background: #fff;
color: black;
-webkit-text-size-adjust: none;
}
.reveal section img {
box-shadow: none;
border: none;
}
.reveal code.shell {
display: block;
overflow-x: auto;
padding: 0.5em;
background: #000;
color: #ddd;
line-height: 125%;
-webkit-text-size-adjust: none;
}
.reveal code.result {
display: block;
overflow-x: auto;
padding: 0.5em;
background: #ddd;
color: #000;
line-height: 125%;
-webkit-text-size-adjust: none;
}
/* Left-align h3 and h4 if they are p elements */
h3.p {
text-align: left;
}
h4.p {
text-align: left;
}
/* and left-aligned but slightly indented bullet lists */
.reveal ul {
display: block;
margin: 0 0 1em 3em;
}
/* Example titles */
p.example {
text-align: left;
margin: 0 0 -0.5em 1em;
font-weight: bold;
}
/* Example output style */
pre.output {
display: block;
overflow-x: auto;
padding: 0.5em;
background: #ddd;
color: black;
line-height: 200%;
-webkit-text-size-adjust: none;
}
</style>
<!-- Printing and PDF exports -->
<script>
var link = document.createElement( 'link' );
link.rel = 'stylesheet';
link.type = 'text/css';
link.href = window.location.search.match( /print-pdf/gi ) ? '/reveal.js/css/print/pdf.css' : '/reveal.js/css/print/paper.css';
document.getElementsByTagName( 'head' )[0].appendChild( link );
</script>
<!-- Needed for charts to work. Fall back to network if no local copy -->
<script type='text/javascript' src='/jquery.min.js'></script>
<script>window.jQuery || document.write('<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js">\x3C/script>')</script>
<script src="/highcharts.js"></script>
<script>window.Highcharts || document.write('<script src="http://code.highcharts.com/highcharts.js">\x3C/script>')</script>
<!--[if lt IE 9]>
<script src="/reveal.js/lib/js/html5shiv.js"></script>
<![endif]-->
</head>
<body>
<div class="reveal">
<!-- Any section element inside of this container is displayed as a slide -->
<div class="slides">
<section>
<h1>Modern PHP</h1>
<h3></h3>
<h3>Mexico City - in person 🎉</h3>
<h3>Dec.7, 2022</h3>
<a href="http://talks.php.net/etsymex22">http://talks.php.net/etsymex22</a><br><br>
<p>Rasmus Lerdorf<br>
<small><a href="http://twitter.com/@rasmus">@rasmus</a></small>
</p>
<aside class="notes">
</aside>
</section>
<section>
<section id="etsyphp">
<img src="/presentations/slides/intro/etsy_arch.png" align="left" width="265" height="581">
<p class="p" style="font-size:2em;text-align:center;">PHP at Etsy</p>
<ul>
<li style="font-size: 1.2em;margin-left: 4em;list-style-type: none;">Linux, Apache, MySQL, PHP</li>
<li style="font-size: 1.2em;margin-left: 4em;list-style-type: none;">Memcache, Gearman, StatsD, Vitess, Redis, Kafka, Varnish</li>
<li style="font-size: 1.2em;margin-left: 4em;list-style-type: none;">GCP, Terraform</li>
</ul>
<p class="p" style="font-size:2em;text-align:center;">API First!</p>
<aside class="notes"><br />
Global, Internal Load Balancer<br />
Managed Instance Groups<br />
Many other stacks not shown, like beacons, assets, downloads<br />
Gearman for longer-running Asynchronous tasks<br />
Crons for non-request triggered<br />
</aside>
</section> </section>
<section>
<section id="etsyfw">
<p class="p" style="font-size:2em;text-align:center;">Framework?</p>
<p class="p" style="font-size:1.8em;text-align:center;">We built our own over the years</p>
<p class="p" style="font-size:1.4em;text-align:center;">(bad idea, don't do that)</p>
<aside class="notes"><br />
Including building our own ORM<br />
There are many great frameworks out there<br />
Laravel, Symfony<br />
</aside>
</section>
<section id="etsyfw1" >
<p class="p" style="font-size:2em;text-align:left;">Request Routing</p>
<pre><code data-trim style="font-size:1em;" >https://etsy.com/awesome/123</code></pre>
<p class="p" style="font-size:1.2em;text-align:left;">.htaccess Apache rewrite rule</p>
<pre><code data-trim style="font-size:1em;" >RewriteRule ^awesome/(\d+)$ /awesome.php?id=$1 [L,NC,QSA]</code></pre>
<aside class="notes"><br />
request routing is a combination of mod_rewrite and PHP bridge code<br />
<br />
L last<br />
NC case-insensitive<br />
QSA append query string<br />
<br />
We have tools that compile these routes for us<br />
</aside>
</section>
<section id="etsyfw2" >
<p class="p" style="font-size:1.4em;text-align:left;">awesome.php</p>
<pre><code class="php" data-trim style="font-size:1em;" >require 'bootstrap.php';
$request = HTTP_Request::getInstance();
$response = HTTP_Response::getInstance();
$controller = new Awesome_Controller();
$controller-&gt;doCoolThings($request, $response);</code></pre>
<aside class="notes"><br />
Very little code here, just routing us to the controller<br />
</aside>
</section>
<section id="etsyfw3" >
<p class="p" style="font-size:1.4em;text-align:left;">Code/Awesome/Controller.php</p>
<pre><code class="php" data-trim style="font-size:1em;" >class Awesome_Controller extends Controller_Base {
public function doCoolThings($request, $response) {
$id = $request-&gt;getGet('id', 0);
if (!$id) {
$response-&gt;redirect_error(Constants::ERROR_NOT_FOUND);
return;
}
$thing = EtsyORM::getFinder('Thing')-&gt;findById($id);
$stuff = Api::endpoint('AwesomeStuff', [$thing-&gt;id, 'max'=&gt;10]);
$this-&gt;renderViewTree(New Awesome_View($thing, $stuff));
}
}</code></pre>
<aside class="notes"><br />
The controller can make direct DB calls<br />
And fan out to the API<br />
</aside>
</section>
<section id="etsyfw4" >
<p class="p" style="font-size:1.4em;text-align:left;">Awesome_View</p>
<pre><code class="php" data-trim style="font-size:1em;" >class Awesome_View implements Neu_View {
const TEMPLATE = &quot;/templates/awesome/main.mustache&quot;;
use Neu_Traits_DefaultView;
public function __construct(AwesomeThing $thing, array $stuff) {
$this-&gt;thing = $thing;
$this-&gt;stuff = $stuff;
}
public function getCssFiles(): array {
return [ '/awesome/main.scss' ];
}
public function getTemplateData(): array {
return [ 'thing_id' =&gt; $this-&gt;thing-&gt;id,
'thing_name' =&gt; $this-&gt;thing-&gt;name,
'stuff' =&gt; $this-&gt;stuff ];
}
}</code></pre>
</section>
<section id="etsyfw5" >
<p class="p" style="font-size:1.4em;text-align:left;">templates/awesome/main.mustache</p>
<pre><code class="mustache" data-trim style="font-size:1em;" >&lt;div&gt;
&lt;p&gt;{{thing_name}} ({{thing_id}})&lt;/p&gt;
&lt;ul&gt;
{{#stuff}}
&lt;li&gt;{{id}} {{description}}&lt;/li&gt;
{{/stuff}}
&lt;/ul&gt;
&lt;/div&gt;</code></pre>
</section> </section>
<section>
<section id="phan">
<h1 style="text-align:center;">Static Analysis</h1>
<br/>
<br/>
<div align="center" style="font-size: 2em; color: ; text-align: center; margin-left: ; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://github.com/phan/phan" target="">github.com/phan/phan</a></div>
</section>
<section id="phan0" >
<p class="p" style="font-size:1.5em;text-align:left;">Install with composer</p>
<pre><code class="shell nohighlight" data-trim style="font-size:1em;" >$ composer require --dev phan/phan</code></pre>
<p class="p" style="font-size:1.5em;text-align:left;">Create .phan/config.php</p>
<pre><code class="shell nohighlight" data-trim style="font-size:1em;" >return [
'target_php_version' =&gt; '8.2',
'directory_list' =&gt; [ 'src/' ],
&quot;exclude_analysis_directory_list&quot; =&gt; [ 'vendor/' ],
];</code></pre>
<pre><code class="shell nohighlight" data-trim style="font-size:1em;" >$ ./vendor/bin/phan</code></pre>
</section>
<section id="phan2" >
<p class="p" style="font-size:1.5em;text-align:center;">Phan in Browser</p>
<div align="center" style="font-size: 2em; color: ; text-align: center; margin-left: ; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://phan.github.io/demo/" target="">phan.github.io/demo/</a></div>
</section>
<section id="phan3" >
<p class="p" style="font-size:1.5em;text-align:center;">Dependency Graph Plugin</p>
<div align="center" style="font-size: 2em; color: ; text-align: center; margin-left: ; margin-right: ; margin-top: ; margin-bottom: ;"><a href="http://pdep.lerdorf.com/?mode=class&node=\Grav\Common\File\CompiledFile&d=1" target="">pdep example</a></div>
<aside class="notes"><br />
Show what depends on the \Grav\Common\File\CompiledFile trait<br />
</aside>
</section>
<section id="phan4" >
<p class="p" style="font-size:2em;text-align:left;">Daemon mode</p>
<pre><code class="shell nohighlight" data-trim style="font-size:1em;" >$ phan --daemonize-tcp-port default &amp;
[1] 28610
Listening for Phan analysis requests at tcp://127.0.0.1:4846
Awaiting analysis requests for directory '/home/rasmus/phan_demo'
$ vi src/script.php</code></pre>
<pre><code class="shell nohighlight" data-trim style="font-size:1em;" >$ phan_client -l src/script.php
Phan error: TypeError: PhanTypeMismatchArgument: Argument 1 (union) is array{0:1} but \C::fn() takes int|string defined at src/script.php:8 in src/script.php on line 14
Phan error: TypeError: PhanTypeMismatchArgument: Argument 3 (shaped) is array{max:10} but \C::fn() takes array{mode:string,max:int} defined at src/script.php:8 in src/script.php on line 16</code></pre>
<aside class="notes"><br />
You can run keep the entire graph in memory using daemon mode<br />
which allows editor integration...<br />
</aside>
</section>
<section id="phan5" >
<p class="p" style="font-size:1.5em;text-align:left;">vim integration</p>
<div id="container">
<video id='video' controls="controls" preload='none' onclick='this.paused ? this.play() : this.pause();'
width="1848" >
<source id='mp4' src="presentations/slides/intro/phanvid.mp4" type='video/mp4'/>
<p>Your user agent does not support the HTML5 Video element.</p>
</video>
</div> </section> </section>
<section>
<section id="deploy">
<h1 style="text-align:center;">Let's deploy it!</h1>
</section>
<section id="deploy0" >
<p class="p" style="font-size:1.7em;text-align:left;">Atomic</p>
<p class="p" style="font-size:1.7em;text-align:left;">No performance hit</p>
<ul>
<li style="font-size: 1.5em;">No restarts</li>
<li style="font-size: 1.5em;">No LB removal</li>
<li style="font-size: 1.5em;">No thundering herd</li>
<li style="font-size: 1.5em;">Cache reuse</li>
</ul>
</section>
<section id="deploy1" >
<p class="p" style="font-size:1em;text-align:left;">Must be able to serve two versions of the site concurrently!</p>
<img src="/presentations/slides/intro/atomic_deploy1.png" width="" height="">
</section>
<section id="deploy2" >
<img src="/presentations/slides/intro/atomic_deploy2.png" width="" height="">
</section>
<section id="deploy3" >
<p class="p" style="font-size:1em;text-align:left;">Requests that begin on DocumentRoot A must finish on A</p>
</section>
<section id="deploy4" >
<p class="p" style="font-size:1em;text-align:left;">Set the DocumentRoot to symlink target!</p>
<p class="p" style="font-size:1em;text-align:left;">Easy with nginx</p>
<pre><code class="ini" data-trim style="font-size:1.1em;" >fastcgi_param DOCUMENT_ROOT $realpath_root</code></pre>
<p class="p" style="font-size:1em;text-align:left;">Apache</p>
<div align="left" style="font-size: 1.25em; color: ; text-align: left; margin-left: 1em; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://github.com/etsy/mod_realdoc" target="">github.com/etsy/mod_realdoc</a></div>
</section>
<section id="deploy5" >
<p class="p" style="font-size:1em;text-align:left;">Avoid hardcoding full paths</p>
<p class="p" style="font-size:1em;text-align:left;">Watch your include_path setting</p>
<p class="p" style="font-size:1em;text-align:left;">incpath extension can resolve your include_path for you</p>
<div align="left" style="font-size: 1.25em; color: ; text-align: left; margin-left: 1em; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://github.com/etsy/incpath" target="">https://github.com/etsy/incpath</a></div>
<aside class="notes"><br />
some contraints...<br />
</aside>
</section>
<section id="deploy6" >
<p class="p" style="font-size:1em;text-align:left;">Version all static assets</p>
<p class="p" style="font-size:1em;text-align:left;">DB Schema changes need special care</p>
</section> </section>
<section>
<section id="supported">
<h2 style="text-align:center;">Version Support</h2>
<img src="http://php.net/images/supported-versions.php" align="center" width="" height="">
<font size="6em">
<table align="left" width="60%" border="0" style="margin-left: 1em;"><tr>
<td bgcolor="#90C090"><span style="font-size: 1em;">Active Support</span>
</td> <td ><span style="">Regular releases and security fixes</span>
</td></tr>
<tr>
<td bgcolor="#F09030"><span style="font-size: 1em;">Security Fixes</span>
</td> <td ><span style="">Only security fixes</span>
</td></tr>
<tr>
<td bgcolor="F03030"><span style="font-size: 1em;">End of Life</span>
</td> <td ><span style="">No longer supported</span>
</td></tr>
</table></font><br />
</section> </section>
<section>
<section id="wpbench">
<div id="wpbench_container" class="stretch" style="margin: 0 auto"></div>
<script src="presentations/slides/intro/wp2022.js"></script>
</section> </section>
<section>
<section id="php80">
<h1 style="text-align:center;">PHP 8.0</h1>
</section>
<section id="php80_named_args" >
<p class="p" style="font-size:1.1em;text-align:left;">Named Arguments</p>
<pre><code class="php" data-trim style="font-size:1em;" >htmlspecialchars($string, double_encode: false);</code></pre>
</section>
<section id="php80_con_prom" >
<p class="p" style="font-size:1.1em;text-align:left;">Constructor Property Promotion</p>
<pre><code class="php" data-trim style="font-size:1.1em;" >class User {
function __construct(public string $name, private string $pwd = &quot;&quot;) { }
}</code></pre>
</section>
<section id="php80_nullsafe" >
<p class="p" style="font-size:1.1em;text-align:left;">Nullsafe Operator with short-circuiting</p>
<pre><code class="php" data-trim style="font-size:1.1em;" >$country = $session?-&gt;user?-&gt;getAddress(geoip())?-&gt;country;</code></pre>
</section>
<section id="php80_match" >
<p class="p" style="font-size:1em;text-align:left;">Match Expression, Union Types</p>
<pre><code class="php" data-trim style="font-size:0.85em;" >function days_in_month(string|int $month, int $year): int {
$leap = $year % 400;
$leap = !$leap|!($leap%4)&amp;!!($leap%100); // 👀
return match(is_string($month) ? strtolower(substr($month, 0, 3)) : $month) {
'apr', 4, 'jun', 6, 'sep', 9, 'nov', 11 =&gt; 30,
'jan', 1, 'mar', 3, 'may', 5, 'jul', 7, 'aug', 8, 'oct', 10, 'dec', 12 =&gt; 31,
'feb', 2 =&gt; $leap ? 29 : 28,
default =&gt; throw new InvalidArgumentException(&quot;Invalid month&quot;),
};
}</code></pre>
</section>
<section id="php80_weakmap" >
<p class="p" style="font-size:1em;text-align:left;">weakMap</p>
<p class="p" style="font-size:0.8em;text-align:left;"> - Map objects to arbitrary values without preventing GC</p>
</section>
<section id="php80_attributes" >
<p class="p" style="font-size:1em;text-align:left;">Attributes</p>
<p class="p" style="font-size:0.8em;text-align:left;"> - Structured metadata</p>
<pre><code class="php" data-trim style="font-size:1em;" >function login(int $user_id, #[\SensitiveParameter] string $pwd) { }</code></pre>
</section> </section>
<section>
<section id="php81">
<h1 style="text-align:center;">PHP 8.1</h1>
</section>
<section id="php81_readonly_props" >
<p class="p" style="font-size:1.1em;text-align:left;">Readonly properties</p>
<pre><code class="php" data-trim style="font-size:1em;" >class Test {
public readonly string $prop;
public function __construct(string $prop) {
$this-&gt;prop = $prop; // Initialized once in same scope
}
}
$test = new Test(&quot;foobar&quot;);
var_dump($test-&gt;prop);
$test-&gt;prop = &quot;foobar&quot;; // Error</code></pre>
</section>
<section id="php81_enums" >
<p class="p" style="font-size:1.1em;text-align:left;">Enums</p>
<pre><code class="php" data-trim style="font-size:1em;" >enum Suit {
case Hearts;
case Diamonds;
case Clubs;
case Spades;
}
function pick_a_card(Suit $suit) { ... }
pick_a_card(Suit::Clubs); // ok
pick_a_card('Spades'); // error</code></pre>
</section>
<section id="php81_fibers" >
<p class="p" style="font-size:1.1em;text-align:left;">Fibers</p>
<p class="p" style="font-size:0.9em;text-align:left;">Full-stack interruptable functions</p>
<pre><code class="php" data-trim style="font-size:1em;" >use React\EventLoop\LoopInterface;
use React\Promise\PromiseInterface;
function await(PromiseInterface $promise, LoopInterface $loop): mixed {
$fiber = Fiber::this();
$promise-&gt;done(
fn(mixed $value) =&gt; $loop-&gt;futureTick(fn() =&gt; $fiber-&gt;resume($value)),
fn(Throwable $reason) =&gt; $loop-&gt;futureTick(fn() =&gt; $fiber-&gt;throw($reason))
);
return Fiber::suspend();
}</code></pre>
</section>
<section id="php81_static_var_inh" >
<p class="p" style="font-size:1.1em;text-align:left;">Change: Static Variable Inheritance</p>
<p class="p" style="font-size:0.9em;text-align:left;">Inherited method shares parent's static vars</p>
<pre><code class="php" data-trim style="font-size:1em;" >class A {
public static function counter() {
static $i = 0;
return ++$i;
}
}
class B extends A {}
echo A::counter();
echo A::counter();
echo B::counter();
echo B::counter();
// PHP 8.0 outputs 1212
// PHP 8.1 outputs 1234</code></pre>
</section>
<section id="php81_never" >
<p class="p" style="font-size:1.1em;text-align:left;">No Return type</p>
<pre><code class="php" data-trim style="font-size:1em;" >function redirect(string $uri): never {
header('Location: ' . $uri);
exit();
}
redirect('/index.html');
echo &quot;this will never be executed!&quot;;</code></pre>
</section>
<section id="php81_final" >
<p class="p" style="font-size:1.1em;text-align:left;">final for class constants</p>
<pre><code class="php" data-trim style="font-size:1em;" >class Foo {
final public const X = &quot;foo&quot;;
}
class Bar extends Foo {
public const X = &quot;bar&quot;;
}
// Fatal error: Bar::X cannot override final constant Foo::X</code></pre>
</section>
<section id="php81_new_init" >
<p class="p" style="font-size:1.1em;text-align:left;">new expressions can be used in initializers</p>
<pre><code class="php" data-trim style="font-size:1em;" >class Test {
public function __construct(private Logger $logger = new NullLogger) {}
}
// instead of
class Test {
private Logger $logger;
public function __construct(?Logger $logger = null) {
$this-&gt;logger = $logger ?? new NullLogger;
}
}</code></pre>
</section>
<section id="php81_first_class_callable" >
<p class="p" style="font-size:1.1em;text-align:left;">First-class callables</p>
<pre><code class="php" data-trim style="font-size:1em;" >$fn = strlen(...);
$fn = $this-&gt;method(...)
$fn = Foo::method(...);
// instead of
$fn = Closure::fromCallable('strlen');
$fn = Closure::fromCallable([$this, 'method']);
$fn = Closure::fromCallable([Foo::class, 'method']);</code></pre>
</section>
<section id="php81_pure_intersection" >
<p class="p" style="font-size:1.1em;text-align:left;">Intersection types</p>
<pre><code class="php" data-trim style="font-size:1em;" >class A {
private Traversable&amp;Countable $countableIterator;
public function setIterator(Traversable&amp;Countable $countableIterator): void {
$this-&gt;countableIterator = $countableIterator;
}
public function getIterator(): Traversable&amp;Countable {
return $this-&gt;countableIterator;
}
}</code></pre>
</section>
<section id="php81_misc" >
<ul>
<li>Inheritance cache (avoid relinking classes)</li>
<li>JIT improvements and add support for ARM64</li>
<li>Optimize class name resolution</li>
</ul>
</section> </section>
<section>
<section id="php82">
<h1 style="text-align:center;">PHP 8.2</h1>
</section>
<section id="php82_readonly_class" >
<p class="p" style="font-size:1.1em;text-align:left;">Readonly Classes</p>
<div align="left" style="font-size: 0.75em; color: ; text-align: left; margin-left: ; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://wiki.php.net/rfc/readonly_classes" target="">https://wiki.php.net/rfc/readonly_classes</a></div>
<pre><code data-trim style="font-size:1em;" >readonly class Test {
public function __construct(public string $prop) { }
}
$test = new Test(&quot;Hi&quot;);
var_dump($test-&gt;prop); // Hi
$test-&gt;prop = &quot;foobar&quot;; // Cannot modify readonly property Test::$prop</code></pre>
<p class="p" style="font-size:1em;text-align:left;">Prevents dynamic properties</p>
<p class="p" style="font-size:1em;text-align:left;">Can't be used with untyped or static properties</p>
</section>
<section id="php82_dnf" >
<p class="p" style="font-size:1.1em;text-align:left;">Disjunctive Normal Form (DNF) Types</p>
<div align="left" style="font-size: 0.75em; color: ; text-align: left; margin-left: ; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://wiki.php.net/rfc/dnf_types" target="">https://wiki.php.net/rfc/dnf_types</a></div>
<pre><code data-trim style="font-size:1em;" >class A { }
class B extends A { };
class Foo {
public function bar((A&amp;B)|null $entity): A&amp;B {
if (!$entity) $entity = new B;
return $entity;
}
}
$c = new Foo;
$c-&gt;bar(new B);</code></pre>
<p class="p" style="font-size:0.75em;text-align:left;">8.0 Union Types X|Y</p>
<p class="p" style="font-size:0.75em;text-align:left;">8.1 Intersection Types X&Y</p>
<p class="p" style="font-size:0.75em;text-align:left;">8.2 DNF Types (X&A)|(Y&B)</p>
</section>
<section id="php82_nft" >
<p class="p" style="font-size:1.1em;text-align:left;">Standalone null, false, and true types</p>
<div align="left" style="font-size: 0.75em; color: ; text-align: left; margin-left: ; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://wiki.php.net/rfc/null-false-standalone-types" target="">https://wiki.php.net/rfc/null-false-standalone-types</a></div>
<div align="left" style="font-size: 0.75em; color: ; text-align: left; margin-left: ; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://wiki.php.net/rfc/true-type" target="">https://wiki.php.net/rfc/true-type</a></div>
<pre><code data-trim style="font-size:1em;" >class Falsy {
public function alwaysFalse(): false { /* ... */ }
public function alwaysTrue(): true { /* ... */ }
public function alwaysNull(): null { /* ... */ }
}</code></pre>
</section>
<section id="php82_random" >
<p class="p" style="font-size:1.1em;text-align:left;">New "Random" extension</p>
<div align="left" style="font-size: 0.75em; color: ; text-align: left; margin-left: ; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://wiki.php.net/rfc/rng_extension" target="">https://wiki.php.net/rfc/rng_extension</a></div>
<div align="left" style="font-size: 0.75em; color: ; text-align: left; margin-left: ; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://wiki.php.net/rfc/random_extension_improvement" target="">https://wiki.php.net/rfc/random_extension_improvement</a></div>
<pre><code data-trim style="font-size:1em;" >$rng = $is_production
? new Random\Engine\Secure()
: new Random\Engine\PCG64(1234);
$randomizer = new Random\Randomizer($rng);
$randomizer-&gt;shuffleString('Testing');</code></pre>
<p class="p" style="font-size:0.75em;text-align:left;">Provides multiple RNG engines as opposed to just using Mersenne Twister</p>
</section>
<section id="php82_trait_constants" >
<p class="p" style="font-size:1.1em;text-align:left;">Constants in Traits</p>
<div align="left" style="font-size: 0.75em; color: ; text-align: left; margin-left: ; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://wiki.php.net/rfc/constants_in_traits" target="">https://wiki.php.net/rfc/constants_in_traits</a></div>
<pre><code data-trim style="font-size:1em;" >trait T {
public const CONSTANT = 1;
public function bar(): int {
return self::CONSTANT;
}
}
class C {
use T;
}
var_dump(C::CONSTANT); // 1</code></pre>
</section>
<section id="php82_sensitive_param" >
<p class="p" style="font-size:1.1em;text-align:left;">Sensitive Parameters</p>
<pre><code data-trim style="font-size:1em;" >class User {
function __construct(string $id, #[\SensitiveParameter] string $pwd) {
throw new \Exception(&quot;Error&quot;);
}
}
$u = new User('rasmus', 'very-secret');</code></pre>
<pre class="output" style="font-size:0.4em;">Fatal error: Uncaught Exception
Stack trace:
#0 /home/rasmus/c(7): User->__construct('rasmus', Object(SensitiveParameterValue))
#1 {main} </pre> </section>
<section id="php82_ddprop" >
<p class="p" style="font-size:1.1em;text-align:left;">Deprecate dynamic properties</p>
<div align="left" style="font-size: 0.75em; color: ; text-align: left; margin-left: ; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://wiki.php.net/rfc/deprecate_dynamic_properties" target="">https://wiki.php.net/rfc/deprecate_dynamic_properties</a></div>
<pre><code data-trim style="font-size:1em;" >class User {
public $name;
}
#[\AllowDynamicProperties]
class User2 { }
$user = new User();
$user-&gt;last_name = 'Doe'; // Deprecated notice
$user = new User2();
$user-&gt;last_name = 'Doe'; // ok
$user = new stdClass();
$user-&gt;last_name = 'Doe'; // ok</code></pre>
</section>
<section id="php82_bite" >
<p class="p" style="font-size:2em;">¡Aguas!</p>
<ul>
<li style="font-size: 1em;margin-left: -2em;">Deprecated dynamic properties!!</li>
<li style="font-size: 0.6em;">use <font color="22AA11">Phan</font> and <font color="22AA11">#[\AllowDynamicProperties]</font></li>
<li style="font-size: 1em;margin-left: -2em;">Deprecated <font color="EE2211">${var}</font> string interpolation</li>
<li style="font-size: 0.6em;">use <font color="22AA11">{$var}</font></li>
<li style="font-size: 1em;margin-left: -2em;">Deprecated <font color="EE2211">utf8_encode()</font> and <font color="EE2211">utf8_decode()</font></li>
<li style="font-size: 0.6em;">decode: use <font color="22AA11">mb_convert_encoding($latin1, 'UTF-8', 'ISO-8859-1')</font></li>
<li style="font-size: 0.6em;">encode: use <font color="22AA11">mb_convert_encoding($utf8, 'ISO-8859-1', 'UTF8')</font></li>
<li style="font-size: 1em;margin-left: -2em;">Functions <font color="EE2211">strtolower()</font> and <font color="EE2211">strtoupper()</font> are no longer locale-sensitive</li>
<li style="font-size: 0.6em;">Use <font color="22AA11">mb_strtoupper()</font>/<font color="22AA11">mb_strtolower()</font> if you need locale-aware conversion</li>
</ul>
</section> </section>
<section>
<section id="ffi">
<h2 style="text-align:center;">Foreign Function Interface</h2>
<p class="p" style="font-size:1.1em;text-align:left;">Call a libc function</p>
<pre><code class="php" data-trim style="font-size:1em;" >$ffi = FFI::cdef(&quot;int sched_getcpu(void);&quot;);
echo &quot;Running on cpu &quot; . $ffi-&gt;sched_getcpu();</code></pre>
</section>
<section id="ffi_load" >
<p class="p" style="font-size:1.1em;text-align:left;">Loading and calling library functions</p>
<pre><code class="php" data-trim style="font-size:1em;" >$ffi = FFI::load(&quot;php_gifenc.h&quot;);</code></pre>
<pre><code class="c" data-trim style="font-size:0.9em;" >#define FFI_SCOPE &quot;gifenc&quot;
#define FFI_LIB &quot;libgifenc.so&quot;
typedef struct ge_GIF {
uint16_t w, h;
int depth;
int fd;
int offset;
int nframes;
uint8_t *frame, *back;
uint32_t partial;
uint8_t buffer[0xFF];
} ge_GIF;
ge_GIF *ge_new_gif(
const char *fname, uint16_t width, uint16_t height,
uint8_t *palette, int depth, int loop);
void ge_add_frame(ge_GIF *gif, uint16_t delay);
void ge_close_gif(ge_GIF* gif);</code></pre>
</section>
<section id="ffi_load_example" >
<pre><code class="php" data-trim style="font-size:1em;" >$ffi = FFI::load(&quot;php_gifenc.h&quot;);
$w = 240; $h = 180;
$cols = $ffi-&gt;new(&quot;uint8_t[12]&quot;);
/* 4 colours: 000000, FF0000, 00FF00, 0000FF */
$cols[3] = 0xFF; $cols[7] = 0xFF; $cols[11] = 0xFF;
$gif = $ffi-&gt;ge_new_gif(&quot;test.gif&quot;, $w, $h, $cols, 2, 0);
for($i = 0; $i &lt; 16; $i++) {
for ($j = 0; $j &lt; $w*$h; $j++) {
$gif-&gt;frame[$j] = ($i*6 + $j) / 12 % 8;
}
$ffi-&gt;ge_add_frame($gif, 5);
}
$ffi-&gt;ge_close_gif($gif);</code></pre>
<img src="/presentations/slides/intro/test.gif" align="center" width="240" height="180">
</section>
<section id="ffi_preload" >
<p class="p" style="font-size:1.1em;text-align:left;">Preloading FFI</p>
<p class="p" style="font-size:0.75em;text-align:left;">/etc/php8/php-fpm-fcgi.ini:</p>
<pre><code class="ini" data-trim style="font-size:1em;" >ffi.enable=preload
ffi.preload=/var/www/html/FFI/*.h
opcache.preload=/var/www/html/preload.php
opcache.preload_user=www-data</code></pre>
<p class="p" style="font-size:0.75em;text-align:left;">preload.php:</p>
<pre><code class="php" data-trim style="font-size:1em;" >foreach(glob(&quot;/var/www/html/FFI/*.php&quot;) as $file) {
include $file;
}</code></pre>
<pre><code class="shell" data-trim style="font-size:0.9em;" >cpp -P -C -D&quot;__attribute__(ARGS)=&quot; /usr/include/cpuinfo.h &gt; cpuinfo-ffi.h</code></pre>
<p class="p" style="font-size:0.75em;text-align:left;">Edit cpuinfo-ffi.h and delete any inline code</p>
</section>
<section id="ffi_class" >
<p class="p" style="font-size:1.1em;text-align:left;">Create a wrapper class</p>
<pre><code class="php" data-trim style="font-size:1em;" >class CPUInfo {
private static ?FFI $cpu = null;
static function init() {
if (self::$cpu) return;
self::$cpu = FFI::scope(&quot;CPUINFO&quot;);
self::$cpu-&gt;cpuinfo_initialize();
}
static function name() {
self::init();
$CData = self::$cpu-&gt;cpuinfo_get_package(0);
return FFI::string($CData[0]-&gt;name);
}
static function __callStatic(string $function, array $args) {
self::init();
return self::$cpu-&gt;{'cpuinfo_'.$function}(...$args);
}
}</code></pre>
</section>
<section id="ffi_class2" >
<p class="p" style="font-size:1.1em;text-align:left;">Mapping a C struct</p>
<pre><code class="php" data-trim style="font-size:0.8em;" >class CPUFreq {
private static ?FFI $cpu = null;
static function init() {
if (self::$cpu) return;
self::$cpu = \FFI::scope(&quot;CPUFREQ&quot;);
}
static function __callStatic(string $function, array $args) {
self::init();
$ret = self::$cpu-&gt;{'cpufreq_'.$function}(...$args);
if ($ret instanceof FFI\CData) {
switch (FFI::typeof($ret)-&gt;getName()) {
case 'char*': $ret = FFI::string($ret); break;
case 'struct cpufreq_policy*':
$ret = [ 'min' =&gt; $ret-&gt;min,
'max' =&gt; $ret-&gt;max,
'gov' =&gt; FFI::string($ret-&gt;governor) ];
break;
}
}
return $ret;
}
}</code></pre>
</section>
<section id="ffi_cpu" >
<p class="p" style="font-size:1.1em;text-align:left;">Calling it</p>
<pre><code class="php" data-trim style="font-size:1em;" >$cpu_name = CPUInfo::name();
$threads = CPUInfo::get_processors_count();
$cores = CPUInfo::get_cores_count();
echo &quot;$cores-core $cpu_name $threads threads\n&quot;;
$cpu = 0;
while(CPUFreq::cpu_exists($cpu) == 0) {
$driver = CPUFreq::get_driver($cpu);
$policy = CPUFreq::get_policy($cpu);
$governor = $policy['gov'];
$min = sprintf(&quot;%.2f&quot;, $policy['min']/1000);
$max = sprintf(&quot;%.2f&quot;, $policy['max']/1000);
echo &quot;CPU &quot; . sprintf(&quot;%02d&quot;, $cpu) .
&quot; $driver $governor ($min MHz - $max MHz): &quot; .
sprintf(&quot;%.2f&quot;, CPUFreq::get_freq_kernel($cpu)/1000) . &quot; MHz\n&quot;;
$cpu++;
}</code></pre>
</section>
<section id="ffi_cpu_output" >
<pre><code data-trim style="font-size:0.8em;" >16-core AMD Ryzen 9 3950X 32 threads
CPU 00 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 1555.64 MHz
CPU 01 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 3500.24 MHz
CPU 02 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 2333.11 MHz
CPU 03 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 1555.63 MHz
CPU 04 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 623.08 MHz
CPU 05 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 550.00 MHz
CPU 06 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 550.00 MHz
CPU 07 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 550.00 MHz
CPU 08 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 634.24 MHz
CPU 09 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 634.24 MHz
CPU 10 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 592.12 MHz
CPU 11 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 592.12 MHz
CPU 12 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 2314.04 MHz
CPU 13 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 550.00 MHz
CPU 14 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 550.00 MHz
CPU 15 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 921.44 MHz
CPU 16 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 1613.96 MHz
CPU 17 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 1960.96 MHz
CPU 18 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 2330.25 MHz
CPU 19 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 1555.87 MHz
CPU 20 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 1389.00 MHz
CPU 21 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 557.21 MHz
CPU 22 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 550.00 MHz
CPU 23 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 550.00 MHz
CPU 24 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 622.76 MHz
CPU 25 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 550.00 MHz
CPU 26 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 592.12 MHz
CPU 27 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 550.00 MHz
CPU 28 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 854.47 MHz
CPU 29 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 799.01 MHz
CPU 30 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 642.85 MHz
CPU 31 amd-pstate ondemand (550.00 MHz - 4762.00 MHz): 844.84 MHz</code></pre>
</section> </section>
<section data-background-color="#000000">
<section id="j">
<img src="/presentations/slides/intro/carl1.jpg" align="center" width="533" height="800">
</section>
<section id="j1" >
<img src="/presentations/slides/intro/carl2.jpg" align="center" width="" height="">
</section>
<section id="j2" >
<img src="/presentations/slides/intro/carl_linuxtag.jpg" align="center" width="" height="">
</section>
<section id="j3" >
<img src="/presentations/slides/intro/tridge.jpg" align="center" width="" height="">
<aside class="notes"><br />
Tridge arguing with Linus<br />
rsync, Samba, ccache, rzip<br />
RIP BitKeeper<br />
</aside>
</section>
<section id="j4" >
<img src="/presentations/slides/intro/roorkee.jpg" align="center" width="" height="">
</section>
<section id="j5" >
<img src="/presentations/slides/intro/arthurcclarke.jpg" align="center" width="" height="">
<aside class="notes"><br />
Arthur C. Clarke!<br />
</aside>
</section>
<section id="j6" >
<img src="/presentations/slides/intro/carl_etsy.png" align="center" width="" height="">
</section> </section>
<section>
<section id="ematter">
<p class="p" style="font-size:1.5em;text-align:center;">35+ years!</p>
<ul style="font-size:0.8em">
<li>Bell Northern Research - Toronto</li>
<li>Northern Telecom - Toronto</li>
<li>Digital Media Networks - Toronto</li>
<li>NovAtel - Calgary</li>
<li>Nutec Informática - Porto Alegre, Brazil</li>
<li>University of Toronto IT - Toronto</li>
<li>Bell Global Solutions - Toronto</li>
<li>IBM - Raleigh, NC</li>
<li>Linuxcare - San Francisco</li>
<li>Yahoo! - Sunnyvale</li>
<li>WePay - Palo Alto</li>
<li>Etsy</li>
</ul>
<aside class="notes"><br />
I was ready to retire after Yahoo!<br />
Ad-driven balacing-act<br />
I don't really like programming<br />
I don't like flying either<br />
</aside>
</section>
<section id="ematter1" >
<img src="/presentations/slides/intro/lovehack-white-1000.png" align="center" width="1001" height="421">
</section>
<section id="ematter2" >
<p class="p" style="font-size:1.8em;text-align:center;">Create more value than you capture. -Tim O'Reilly</p>
<aside class="notes"><br />
Etsy<br />
</aside>
</section>
<section id="ematter3" >
<p class="p" style="font-size:2em;text-align:center;">Work on things that matter (to you)</p>
</section> </section>
<section>
<section id="sahana0">
<img src="/presentations/slides/intro/slideshow_images/sahana3.png" align="center" width="1000" height="720">
</section>
<section id="sahana1" >
<img src="/presentations/slides/intro/slideshow_images/sahana_final.png" align="center" width="1000" height="720">
<aside class="notes"><br />
Can't end on a better point<br />
</aside>
</section> </section>
<section>
<section id="thank_you">
<p class="p" style="font-size:2em;text-align:center;">¡Gracias!</p>
<br/>
<div align="center" style="font-size: 1.4em; color: ; text-align: center; margin-left: 0em; margin-right: ; margin-top: ; margin-bottom: ;"><a href=":-:url:-:" target="">http://talks.php.net/etsymex22</a></div>
<br/>
<p class="p" style="font-size:1.6em;text-align:center;">Interested in joining our team?</p>
<p class="p" style="font-size:1.3em;text-align:center;">Please email your CV/resume to</p>
<p class="p" style="font-size:1.4em;text-align:center;">mexico-hiring@etsy.com</p>
</section> </section>
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