com presentations: Talk for the Etsy interns: etsy_interns1 9.html etsy_interns19.xml
[email protected] (Rasmus Lerdorf) Thu, 18 Jul 2019 20:00:15 +0000
| Newsgroups | php.pres |
|---|---|
| Message-ID | <[email protected]> |
Commit: 275a55b6b17354dc748ed177cfc07e9ffea191b8 Author: Rasmus Lerdorf <[email protected]> Thu, 18 Jul 2019 16:00:15 -0400 Parents: 42df06941c444f37f997a9c51cfde598b757730b Branches: master Link: http://git.php.net/?p=presentations.git;a=commitdiff;h=275a55b6b17354dc748ed177cfc07e9ffea191b8 Log: Talk for the Etsy interns Changed paths: A etsy_interns19.html A etsy_interns19.xml
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+<!doctype html>
+<html lang="en">
+
+ <head>
+ <meta charset="utf-8">
+
+ <title>25 Years of PHP</title>
+
+ <meta name="description" content="25 Years of 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">
+
+ <!-- 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 ) ? 'css/print/pdf.css' : 'css/print/paper.css';
+ document.getElementsByTagName( 'head' )[0].appendChild( link );
+ </script>
+
+ <!-- For syntax highlighting - note that these are not the generic highlight.js theme files - see https://github.com/nwinkler/reveal-highlight-themes -->
+ <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>25 Years of PHP</h1>
+ <h3>Etsy</h3>
+ <h3>Brooklyn</h3>
+ <h3>July 18, 2019</h3>
+ <a href="http://talks.php.net/etsy_interns19">http://talks.php.net/etsy_interns19</a><br><br>
+ <p>Rasmus Lerdorf<br>
+ <small><a href="http://twitter.com/@rasmus">@rasmus</a></small>
+ </p>
+ <aside class="notes">
+ </aside>
+ </section>
+ <section data-background-color="#000000">
+ <section id="s">
+ <img src="/presentations/slides/intro/greenland_map.png" align="center" width="" height="">
+ </section>
+<section id="s1">
+ <img src="/presentations/slides/intro/greenland_edge.jpg" align="center" width="" height="">
+ </section>
+<section id="s2">
+ <img src="/presentations/slides/intro/greenland_boots.jpg" align="center" width="" height="">
+ </section>
+<section id="s3">
+ <img src="/presentations/slides/intro/greenland_box.jpg" align="center" width="" height="">
+ </section>
+<section id="s4">
+ <img src="/presentations/slides/intro/greenland_dogsled.jpg" align="center" width="" height="">
+ </section>
+<section id="s5">
+ <img src="/presentations/slides/intro/greenland_house.jpg" align="center" width="" height="">
+ </section>
+<section id="s6">
+ <img src="/presentations/slides/intro/greenland_summer.jpg" align="center" width="" height="">
+ </section>
+<section id="s7">
+ <img src="/presentations/slides/intro/greenland_tech1.jpg" align="center" width="" height="">
+ </section>
+<section id="s8">
+ <img src="/presentations/slides/intro/greenland_tech2.jpg" align="center" width="" height="">
+ </section>
+<section id="s9">
+ <img src="/presentations/slides/intro/greenland_tech3.jpg" align="center" width="" height="">
+ </section> </section>
+ <section>
+ <section id="hist_80s">
+ <h1 style="text-align:center;text-transform:none">1980s</h1>
+ <img src="/presentations/slides/intro/timex.jpg" align="center" width="" height="">
+ </section>
+<section id="hist_80s_1">
+ <img src="/presentations/slides/intro/vic20.jpg" align="center" width="" height="">
+ </section>
+<section id="hist_80s_2">
+ <img src="/presentations/slides/intro/hayes.jpg" align="center" width="" height="">
+ </section>
+<section id="hist_80s_3">
+ <img src="/presentations/slides/intro/Zmodem.gif" align="center" width="" height="">
+ </section> </section>
+ <section>
+ <section id="hist_90s">
+ <h1 style="text-align:center;text-transform:none">1990s</h1>
+ <img src="/presentations/slides/intro/gopher.gif" align="center" width="" height="">
+ </section>
+<section id="hist_90s_1">
+ <img src="/presentations/slides/intro/mosaic.jpg" align="center" width="" height="">
+ </section> </section>
+ <section>
+ <section id="hist_1993">
+ <h3 class="p" style="text-align:center;">1993</h3>
+ <pre><code class="C" data-trim style="font-size:0.8em;" >#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+
+#define ishex(x) (((x) >= '0' && (x) <= '9') || ((x) >= 'a' && \
+ (x) <= 'f') || ((x) >= 'A' && (x) <= 'F'))
+
+int htoi(char *s) {
+ int value;
+ char c;
+
+ c = s[0];
+ if(isupper(c)) c = tolower(c);
+ value=(c >= '0' && c <= '9' ? c - '0' : c - 'a' + 10) * 16;
+
+ c = s[1];
+ if(isupper(c)) c = tolower(c);
+ value += c >= '0' && c <= '9' ? c - '0' : c - 'a' + 10;
+
+ return(value);
+}
+
+void main(int argc, char *argv[]) {
+ char *params, *data, *dest, *s, *tmp;
+ char *name, *age;
+
+ puts("Content-type: text/html\r\n");
+ puts("<HTML><HEAD><TITLE>Form Example</TITLE></HEAD>");
+ puts("<BODY><H1>My Example Form</H1>");
+ puts("<FORM action=\"form.cgi\" method=\"GET\">");
+ puts("Name: <INPUT type=\"text\" name=\"name\">");
+ puts("Age: <INPUT type=\"text\" name=\"age\">");
+ puts("<BR><INPUT type=\"submit\">");
+ puts("</FORM>");
+
+ data = getenv("QUERY_STRING");
+ if(data && *data) {
+ params = data; dest = data;
+ while(*data) {
+ if(*data=='+') *dest=' ';
+ else if(*data == '%' && ishex(*(data+1))&&ishex(*(data+2))) {
+ *dest = (char) htoi(data + 1);
+ data+=2;
+ } else *dest = *data;
+ data++;
+ dest++;
+ }
+ *dest = '\0';
+ s = strtok(params,"&");
+ do {
+ tmp = strchr(s,'=');
+ if(tmp) {
+ *tmp = '\0';
+ if(!strcmp(s,"name")) name = tmp+1;
+ else if(!strcmp(s,"age")) age = tmp+1;
+ }
+ } while(s=strtok(NULL,"&"));
+
+ printf("Hi %s, you are %s years old\n",name,age);
+ }
+ puts("</BODY></HTML>");
+}</code></pre>
+ </section> </section>
+ <section>
+ <section id="hist_1993_2">
+ <h3 class="p" style="text-align:center;">1993</h3>
+ <pre><code class="Perl" data-trim >use CGI qw(:standard);
+print header;
+print start_html('Form Example'),
+ h1('My Example Form'),
+ start_form,
+ "Name: ", textfield('name'),
+ p,
+ "Age: ", textfield('age'),
+ p,
+ submit,
+ end_form;
+if(param()) {
+ print "Hi ",em(param('name')),
+ "You are ",em(param('age')),
+ " years old";
+}
+print end_html;</code></pre>
+ </section> </section>
+ <section>
+ <section id="hist_1994">
+ <h3 class="p" style="text-align:center;">1994-1995</h3>
+ <pre><code class="PHP" data-trim ><html><head><title>Form Example</title></head>
+<body><h1>My Example Form</h1>
+<form action="form.phtml" method="POST">
+Name: <input type="text" name="name">
+Age: <input type="text" name="age">
+<br><input type="submit">
+</form>
+<?if($name):?>
+Hi <?echo $name?>, you are <?echo $age?> years old
+<?endif?>
+</body></html></code></pre>
+ </section> </section>
+ <section>
+ <h2>C API for the Web</h2>
+ <pre><code class="C" data-trim >void Cos(void) {
+ Stack *s;
+ char temp[64];
+
+ s = Pop();
+ if(!s) {
+ Error("Stack error in cos");
+ return;
+ }
+ sprintf(temp,"%f",cos(s->douval));
+ Push(temp,DNUMBER);
+}</code></pre>
+ <h4 class="p">And you could then use it like this:</h4>
+ <pre><code class="nohighlight" data-trim ><html><head><title>Cos Example</title></head>
+<body><h1>Cos Example</h1>
+<?echo Cos($input)>
+</body></html></code></pre>
+<aside class="notes"><br />
+Actually the very first markup used html comments<br />
+<? ... > came shortly after.<br />
+Note the lack of the closing '?'<br />
+BUT nobody was interested!<br />
+</aside>
+ </section>
+ <section>
+ <h3 class="p">Focus on the Ecosystem</h3>
+ <ul>
+ <li style="font-size: 1.1em;margin-left: 2em;list-style-type: none;">LAMP wasn't an accident</li>
+ <li style="font-size: 1.1em;margin-left: 2em;list-style-type: none;">Robustness, Performance and Security</li>
+ <li style="font-size: 1.1em;margin-left: 2em;list-style-type: none;"><font color="ff2233">♥</font> shared hosting ISPs</li>
+ </ul>
+<br/>
+ <h3 class="p">Scale</h3>
+ <ul>
+ <li style="font-size: 1.1em;margin-left: 2em;list-style-type: none;">Scaling up is expected</li>
+ <li style="font-size: 1.1em;margin-left: 2em;list-style-type: none;">Scaling down is surprisingly hard</li>
+ <li style="font-size: 1.1em;margin-left: 2em;list-style-type: none;">Doing both is rocket science</li>
+ </ul>
+ </section>
+ <section>
+ <h3 class="p">Performance</h3>
+ <ul>
+ <li style="font-size: 1.1em;margin-left: 1em;list-style-type: bullet;">mod_php</li>
+ <li style="font-size: 1.1em;margin-left: 1em;list-style-type: bullet;">shared-nothing perfect sandbox model</li>
+ </ul>
+ <h3 class="p">Robustness</h3>
+ <ul>
+ <li style="font-size: 1.1em;margin-left: 1em;list-style-type: bullet;">SQL LIMIT clause</li>
+ <li style="font-size: 1.1em;margin-left: 1em;list-style-type: bullet;">Promote Prefork shared-nothing model</li>
+ </ul>
+ <h3 class="p">Security</h3>
+ <ul>
+ <li style="font-size: 1.1em;margin-left: 1em;list-style-type: bullet;">max_execution_time</li>
+ <li style="font-size: 1.1em;margin-left: 1em;list-style-type: bullet;">memory_limit</li>
+ <li style="font-size: 1.1em;margin-left: 1em;list-style-type: bullet;">safe mode</li>
+ </ul>
+ </section>
+ <section>
+ <section id="omg">
+ <h3 class="p">What was he thinking?</h3>
+ <ul>
+ <li style="font-size: 1.1em;margin-left: 2em;list-style-type: none;">Case insensitive function names?</li>
+ <li style="font-size: 1.1em;margin-left: 2em;list-style-type: none;">Naming inconsistencies?</li>
+ <li style="font-size: 1.1em;margin-left: 2em;list-style-type: none;">What's with the $ signs?</li>
+ <li style="font-size: 1.1em;margin-left: 2em;list-style-type: none;">Globals?</li>
+ <li style="font-size: 1.1em;margin-left: 2em;list-style-type: none;">register_globals?</li>
+ <li style="font-size: 1.1em;margin-left: 2em;list-style-type: none;">magic_quotes?</li>
+ </ul>
+ </section>
+<section id="omg1">
+ <h3 class="p">OMGWTFBBQ?</h3>
+ <pre><code data-trim style="font-size:1.6em;" >array_search($needle, $haystack);
+strstr($haystack, $needle);
+in_array($needle, $haystack);
+substr_count($haystack, $needle);
+array_key_exists($needle, $haystack);
+strchr($haystack, $needle);</code></pre>
+ </section> </section>
+ <section>
+ <section id="wpbench">
+
+<div id="wpbench_container" class="stretch" style="margin: 0 auto"></div>
+<script src="presentations/slides/intro/wp2018.js"></script>
+ </section> </section>
+ <section>
+ <section id="smemwp">
+
+<div id="smemwp_container" class="stretch" style="margin: 0 auto"></div>
+<script src="presentations/slides/intro/smemwp2018.js"></script>
+ </section> </section>
+ <section>
+ <section id="php74">
+ <h1 style="text-align:center;">PHP 7.4</h1>
+ </section>
+<section id="php74_typedprop">
+ <p class="p" style="font-size:1.1em;text-align:left;">Typed Properties</p>
+ <pre><code data-trim style="font-size:1.1em;" >class User {
+ public int $id;
+ public string $name;
+
+ public function __construct(int $id, string $name) {
+ $this->id = $id;
+ $this->name = $name;
+ }
+}</code></pre>
+ </section>
+<section id="php74_arrow">
+ <p class="p" style="font-size:1.1em;text-align:left;">Arrow Functions</p>
+ <pre><code data-trim style="font-size:1.1em;" >$cb = function ($x) use ($y) {
+ return $x + $y;
+ };
+
+$cb = fn($x) => $x + $y;</code></pre>
+ </section>
+<section id="php74_serialize">
+ <p class="p" style="font-size:1.1em;text-align:left;">__serialize/__unserialize</p>
+ <pre><code data-trim style="font-size:1.1em;" >class Test {
+ public $prop;
+ public function __serialize() {
+ return ['prop' => $this->prop];
+ }
+ public function __unserialize(array $data) {
+ $this->prop = $data['prop'];
+ }
+}</code></pre>
+ </section>
+<section id="null_coalesce_assign">
+ <p class="p" style="font-size:1em;text-align:left;">Null Coalescing Assignment Operator</p>
+ <pre><code data-trim style="font-size:1em;" >$this->config['value'] = $this->config['value'] ?? 'default_value';
+$this->config['value'] ??= 'default_value';</code></pre>
+ </section>
+<section id="weakref">
+ <p class="p" style="font-size:1em;text-align:left;">Weak References</p>
+ <pre><code data-trim style="font-size:1em;" >$std = new stdClass;
+$wr = WeakReference::create($std);</code></pre>
+ </section>
+<section id="php74_preload">
+ <p class="p" style="font-size:1.8em;text-align:center;">Opcache Preloading</p>
+ <ul>
+ <li>Loads userspace code at server startup as if it was part of core PHP</li>
+ <li>Trades some flexibility for performance</li>
+ <li>Inspired by the “Class Data Sharing” feature in Java's Hotspot VM</li>
+ </ul>
+ </section>
+<section id="php74_preload1">
+ <p class="p" style="font-size:1em;text-align:left;">Without Opcache Preloading</p>
+ <pre><code data-trim style="font-size:1.1em;" >class A {
+ function __construct() {
+ echo "A";
+ }
+}</code></pre>
+ <pre><code data-trim style="font-size:1em;" >spl_autoload_register('__load');
+function __load($c) {
+ echo "Autoloader called for $c\n";
+ require "/home/rasmus/".strtolower($c).".php";
+}
+
+new A;</code></pre>
+ <pre><code class="shell nohighlight" data-trim style="font-size:1.1em;" >$ php script.php
+Autoloader called for A
+A</code></pre>
+ </section>
+<section id="php74_preload2">
+ <p class="p" style="font-size:1em;text-align:left;">With Opcache Preloading</p>
+ <pre><code data-trim style="font-size:1em;" >function preload($filename) {
+ if (!opcache_compile_file($filename)) {
+ trigger_error("Preloading Failed", E_USER_ERROR);
+ }
+}
+
+preload("/home/rasmus/a.php");</code></pre>
+ <pre><code class="shell nohighlight" data-trim style="font-size:1.1em;" >$ php -d opcache.preload=preload.php script.php
+A</code></pre>
+ </section>
+<section id="ffi">
+ <p class="p" style="font-size:1em;text-align:left;">FFI - Foreign Function Interface</p>
+ <pre><code data-trim style="font-size:1em;" >// create FFI object, loading libc and exporting function printf()
+$ffi = FFI::cdef(
+ "int printf(const char *format, ...);",
+ "libc.so.6");
+// call C printf()
+$ffi->printf("Hello %s!\n", "world");</code></pre>
+ </section>
+<section id="ffi_example">
+ <pre><code data-trim style="font-size:1em;" ><?php
+ $ffi = FFI::load("php_gifenc.h");
+
+ $w = 240; $h = 180;
+ $cols = $ffi->new("uint8_t[12]");
+ /* 4 colours: 000000, FF0000, 00FF00, 0000FF */
+ $cols[3] = 0xFF; $cols[7] = 0xFF; $cols[11] = 0xFF;
+
+ $gif = $ffi->ge_new_gif("test.gif", $w, $h, $cols, 2, 0);
+
+ for($i = 0; $i < 16; $i++) {
+ for ($j = 0; $j < $w*$h; $j++) {
+ $gif->frame[$j] = ($i*6 + $j) / 12 % 8;
+ }
+ echo "Add frame $i\n";
+ $ffi->ge_add_frame($gif, 5);
+ }
+ $ffi->ge_close_gif($gif);</code></pre>
+ </section>
+<section id="ffi_example_header">
+ <pre><code data-trim style="font-size:1em;" >#define FFI_SCOPE "gifenc"
+#define FFI_LIB "libgifenc.so"
+
+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_example_output">
+ <img src="/presentations/slides/intro/test.gif" align="center" width="240" height="180">
+ </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/carl_centipede.jpg" align="center" width="" height="">
+ </section>
+<section id="j4">
+ <img src="/presentations/slides/intro/tridge.jpg" align="center" width="" height="">
+ </section>
+<section id="j5">
+ <img src="/presentations/slides/intro/roorkee.jpg" align="center" width="" height="">
+ </section>
+<section id="j6">
+ <img src="/presentations/slides/intro/arthurcclarke.jpg" align="center" width="" height="">
+ </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">
+ </section> </section>
+ <section>
+ <h3 class="p" style="text-align:center;">Work on things that matter (to you)</h3>
+ </section>
+ <section>
+ <img src="/presentations/slides/intro/lovehack-white-1000.png" align="center" width="1001" height="421">
+ </section>
+ </div>
+
+ </div>
+
+ <script src="/reveal.js/lib/js/head.min.js"></script>
+ <script src="/reveal.js/js/reveal.js"></script>
+
+ <script>
+
+ Reveal.initialize({
+ controls: true,
+ progress: true,
+ history: true,
+ center: true,
+ width: 1024,
+ height: 768,
+
+ transition: 'slide', // none/fade/slide/convex/concave/zoom
+ transitionSpeed: 'fast',
+
+ // Optional reveal.js plugins
+ dependencies: [
+ { src: '/reveal.js/lib/js/classList.js', condition: function() { return !document.body.classList; } },
+ { src: '/highlight.min.js', async: true, condition: function() { return !!document.querySelector( 'pre code' ); }, callback: function() { hljs.initHighlightingOnLoad(); } },
+ { src: '/reveal.js/plugin/zoom-js/zoom.js', async: true },
+ { src: '/reveal.js/plugin/notes/notes.js', async: true },
+ { src: '/reveal.js/plugin/line-numbers/line-numbers.js' }
+ ]
+ });
+ /* This draws the graph on the slide on a slidechanged event */
+ Reveal.addEventListener('slidechanged', function(event) {
+ var callback = "render_"+event.currentSlide.id;
+ if(typeof(window[callback])=="function") {
+ window[callback]();
+ }
+ } );
+ /* This draws the graph if we got here directly without coming from another slide */
+ Reveal.addEventListener('ready', function(event) {
+ var callback = "render_"+event.currentSlide.id;
+ if(typeof(window[callback])=="function") {
+ window[callback]();
+ }
+ } );
+ </script>
+
+ </body>
+</html>
diff --git a/etsy_interns19.xml b/etsy_interns19.xml
new file mode 100644
index 0000000..008ecaa
--- /dev/null
+++ b/etsy_interns19.xml
@@ -0,0 +1,45 @@
+<presentation
+ template="simple"
+ navmode="html"
+ titlecolor="#000000"
+ navbarbackground="#bbbbbb"
+ navbartopiclinks="0"
+ logo1="images/php-med-trans.png"
+ titlesize="6em"
+ navbarheight="3.5em"
+ examplebackground="#ffffff"
+ outputbackground="#ffffff"
+ exampleclass="noshadow"
+ exampleoutputclass="noshadow"
+>
+
+<topic>PHP</topic>
+<title>25 Years of PHP</title>
+<event>Etsy</event>
+<location>Brooklyn</location>
+<date>July 18, 2019</date>
+<speaker>Rasmus Lerdorf</speaker>
+<url>http://talks.php.net/etsy_interns19</url>
+<twitter>@rasmus</twitter>
+
+<slide>slides/intro/titlepage.xml</slide>
+
+<slide>slides/intro/greenland.xml</slide>
+<slide>slides/intro/80s.xml</slide>
+<slide>slides/intro/90s.xml</slide>
+<slide>slides/intro/nold.xml</slide>
+<slide>slides/intro/nold2.xml</slide>
+<slide>slides/intro/nold3.xml</slide>
+<slide>slides/intro/capi.xml</slide>
+<slide>slides/intro/eco.xml</slide>
+<slide>slides/intro/wwht2.xml</slide>
+<slide>slides/intro/wwht1.xml</slide>
+<slide>slides/intro/wp2018.xml</slide>
+<slide>slides/intro/smemwp2018.xml</slide>
+<slide>slides/intro/php74_2019.xml</slide>
+<slide>slides/intro/journey2.xml</slide>
+<slide>slides/intro/sahana.xml</slide>
+<slide>slides/intro/matter.xml</slide>
+<slide>slides/intro/lovehack.xml</slide>
+
+</presentation>