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857 lines
33 KiB
HTML
857 lines
33 KiB
HTML
<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>PHP 7 in 2017</title>
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<meta name="description" content="PHP 7 in 2017">
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<meta name="author" content="Rasmus Lerdorf">
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<meta name="apple-mobile-web-app-capable" content="yes" />
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<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, minimal-ui">
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<link rel="stylesheet" href="/reveal.js/css/theme/white.css" id="theme">
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<!-- For syntax highlighting - note that these are not the generic highlight.js theme files - see https://github.com/nwinkler/reveal-highlight-themes -->
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<link rel="stylesheet" href="/styles/xcode.css">
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<!-- Override a few styles -->
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<style>
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/*
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Not actually sure why this block isn't being picked up from the syntax highlight css
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If you change the syntax highlight theme, copy the first block here
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*/
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.reveal pre {
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width: 100%;
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}
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.reveal pre code {
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display: block;
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max-height: 600px;
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overflow-x: auto;
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padding: 0.5em;
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line-height: 125%;
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background: #fff;
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color: black;
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-webkit-text-size-adjust: none;
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}
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.reveal section img {
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box-shadow: none;
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border: none;
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}
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.reveal code.shell {
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display: block;
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overflow-x: auto;
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padding: 0.5em;
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background: #000;
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color: #ddd;
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line-height: 125%;
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-webkit-text-size-adjust: none;
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}
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/* Left-align h3 and h4 if they are p elements */
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h3.p {
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text-align: left;
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}
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h4.p {
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text-align: left;
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}
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/* and left-aligned but slightly indented bullet lists */
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.reveal ul {
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display: block;
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margin: 0 0 1em 3em;
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}
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/* Example titles */
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p.example {
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text-align: left;
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margin: 0 0 -0.5em 1em;
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font-weight: bold;
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}
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/* Example output style */
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pre.output {
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display: block;
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overflow-x: auto;
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padding: 0.5em;
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background: #ddd;
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color: black;
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line-height: 200%;
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-webkit-text-size-adjust: none;
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}
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</style>
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<!-- Printing and PDF exports -->
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<script>
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var link = document.createElement( 'link' );
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link.rel = 'stylesheet';
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<script type='text/javascript' src='/jquery.min.js'></script>
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<script>window.jQuery || document.write('<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js">\x3C/script>')</script>
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<script src="/highcharts.js"></script>
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<script>window.Highcharts || document.write('<script src="http://code.highcharts.com/highcharts.js">\x3C/script>')</script>
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<!--[if lt IE 9]>
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<script src="/reveal.js/lib/js/html5shiv.js"></script>
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<![endif]-->
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</head>
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<body>
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<div class="reveal">
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<!-- Any section element inside of this container is displayed as a slide -->
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<div class="slides">
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<section>
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<h1>PHP 7 in 2017</h1>
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<h3>WeAreDevelopers</h3>
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<h3>Vienna</h3>
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<h3> May 12, 2017</h3>
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<a href="http://talks.php.net/vienna17">http://talks.php.net/vienna17</a><br><br>
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<p>Rasmus Lerdorf<br>
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<small><a href="http://twitter.com/@rasmus">@rasmus</a></small>
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</p>
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<aside class="notes">
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</aside>
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</section>
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<section>
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<section id="hist_80s">
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<h1 style="text-align:center;text-transform:none">1980s</h1>
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<img src="/presentations/slides/intro/vic20.jpg" align="center" width="" height="">
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</section>
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<section id="hist_80s_1">
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<img src="/presentations/slides/intro/hayes.jpg" align="center" width="" height="">
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</section>
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<section id="hist_80s_2">
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<img src="/presentations/slides/intro/Zmodem.gif" align="center" width="" height="">
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</section> </section>
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<section>
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<section id="hist_90s">
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<h1 style="text-align:center;text-transform:none">1990s</h1>
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<img src="/presentations/slides/intro/gopher.gif" align="center" width="" height="">
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</section>
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<section id="hist_90s_1">
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<img src="/presentations/slides/intro/mosaic.jpg" align="center" width="" height="">
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</section> </section>
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<section>
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<section id="hist_1993">
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<h3 class="p" style="text-align:center;">1993</h3>
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<pre><code class="C" data-trim style="font-size:0.8em;" >#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <string.h>
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#define ishex(x) (((x) >= '0' && (x) <= '9') || ((x) >= 'a' && \
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(x) <= 'f') || ((x) >= 'A' && (x) <= 'F'))
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int htoi(char *s) {
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int value;
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char c;
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c = s[0];
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if(isupper(c)) c = tolower(c);
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value=(c >= '0' && c <= '9' ? c - '0' : c - 'a' + 10) * 16;
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c = s[1];
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if(isupper(c)) c = tolower(c);
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value += c >= '0' && c <= '9' ? c - '0' : c - 'a' + 10;
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return(value);
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}
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void main(int argc, char *argv[]) {
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char *params, *data, *dest, *s, *tmp;
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char *name, *age;
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puts("Content-type: text/html\r\n");
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puts("<HTML><HEAD><TITLE>Form Example</TITLE></HEAD>");
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puts("<BODY><H1>My Example Form</H1>");
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puts("<FORM action=\"form.cgi\" method=\"GET\">");
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puts("Name: <INPUT type=\"text\" name=\"name\">");
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puts("Age: <INPUT type=\"text\" name=\"age\">");
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puts("<BR><INPUT type=\"submit\">");
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puts("</FORM>");
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data = getenv("QUERY_STRING");
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if(data && *data) {
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params = data; dest = data;
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while(*data) {
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if(*data=='+') *dest=' ';
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else if(*data == '%' && ishex(*(data+1))&&ishex(*(data+2))) {
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*dest = (char) htoi(data + 1);
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data+=2;
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} else *dest = *data;
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data++;
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dest++;
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}
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*dest = '\0';
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s = strtok(params,"&");
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do {
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tmp = strchr(s,'=');
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if(tmp) {
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*tmp = '\0';
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if(!strcmp(s,"name")) name = tmp+1;
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else if(!strcmp(s,"age")) age = tmp+1;
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}
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} while(s=strtok(NULL,"&"));
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printf("Hi %s, you are %s years old\n",name,age);
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}
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puts("</BODY></HTML>");
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}</code></pre>
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</section> </section>
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<section>
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<section id="hist_1993_2">
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<h3 class="p" style="text-align:center;">1993</h3>
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<pre><code class="Perl" data-trim >use CGI qw(:standard);
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print header;
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print start_html('Form Example'),
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h1('My Example Form'),
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start_form,
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"Name: ", textfield('name'),
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p,
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"Age: ", textfield('age'),
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p,
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submit,
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end_form;
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if(param()) {
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print "Hi ",em(param('name')),
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"You are ",em(param('age')),
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" years old";
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}
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print end_html;</code></pre>
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</section> </section>
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<section>
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<section id="hist_1994">
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<h3 class="p" style="text-align:center;">1994-1995</h3>
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<pre><code class="PHP" data-trim ><html><head><title>Form Example</title></head>
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<body><h1>My Example Form</h1>
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<form action="form.phtml" method="POST">
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Name: <input type="text" name="name">
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Age: <input type="text" name="age">
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<br><input type="submit">
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</form>
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<?if($name):?>
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Hi <?echo $name?>, you are <?echo $age?> years old
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<?endif?>
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</body></html></code></pre>
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</section> </section>
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<section>
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<section id="php7_speed">
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<img src="/presentations/slides/intro/php7trans-200.png" width="" height="">
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<p class="p" style="font-size:1.1em;text-align:left;">✔ engine improvements</p>
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<ul>
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<li style="font-size: 1em;">100%+ performance gain on most real-world applications</li>
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<li style="font-size: 1em;">Lower memory usage, sometimes drastically lower</li>
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</ul>
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</section> </section>
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<section>
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<section id="php7perfdetail">
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<h1 style="text-align:center;">JIT?</h1>
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</section>
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<section id="php7perfdetail1">
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<p class="p" style="font-size:1.1em;">Improve CPU cache usage</p>
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<ul>
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<li style="font-size: 1em;list-style-type: none;">Step 1: Decrease overall data</li>
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<li style="font-size: 1em;list-style-type: none;">Step 2: Better data locality and less indirections</li>
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<li style="font-size: 1em;list-style-type: none;">Step 3: Save the world!</li>
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</ul>
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</section>
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<section id="php7perfdetail1">
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<ul>
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<li style="font-size: 1em;list-style-type: none;">zval size reduced from 24 to 16 bytes</li>
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<li style="font-size: 1em;list-style-type: none;">Hashtable size reduced from 72 to 56 bytes</li>
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<li style="font-size: 1em;list-style-type: none;">Hashtable bucket size reduced from 72 to 32 bytes</li>
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<li style="font-size: 1em;list-style-type: none;">Immutable array optimization</li>
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</ul>
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<pre><code data-trim style="font-size:1.1em;" >$a = [];
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for($i=0; $i < 100000;$i++) {
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$a[] = ['abc','def','ghi','jkl','mno','pqr'];
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}
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echo memory_get_usage(true);
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// PHP 5.x 109M
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// PHP 7.0 42M no opcache
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// PHP 7.0 6M with opcache enabled</code></pre>
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</section>
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<section id="php7perfdetail2">
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<ul>
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<li style="font-size: 1em;list-style-type: none;">New memory allocator similar to jemalloc</li>
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<li style="font-size: 1em;list-style-type: none;">Faster hashtable iteration API</li>
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<li style="font-size: 1em;list-style-type: none;">Array duplication optimization</li>
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<li style="font-size: 1em;list-style-type: none;">PCRE JIT enabled by default</li>
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<li style="font-size: 1em;list-style-type: none;">Precomputed string hashes</li>
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<li style="font-size: 1em;list-style-type: none;">Fast ZPP (ZendParseParameters) implementation</li>
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<li style="font-size: 1em;list-style-type: none;">Faster stack-allocated zvals (instead of heap)</li>
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<li style="font-size: 1em;list-style-type: none;">Optimized VM calling</li>
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<li style="font-size: 1em;list-style-type: none;">Global register variables with gcc 4.8+</li>
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<li style="font-size: 1em;list-style-type: none;">plus hundreds of micro-optimizations</li>
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</ul>
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</section>
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<section id="php7detail4">
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<h1 style="text-align:center;">JIT?</h1>
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</section> </section>
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<section>
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<section id="wpbench">
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<div id="wpbench_container" class="stretch" style="margin: 0 auto"></div>
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<script src="presentations/slides/intro/wp2017may.js"></script>
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</section>
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<section id="fdo">
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<p class="p" style="font-size:1.1em;text-align:center;">GCC Feedback-Directed Optimization (FDO)</p>
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<pre><code class="shell nohighlight" data-trim style="font-size:1em;" >$ gcc --version
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gcc (Debian 6.3.0-14) 6.3.0 20170415
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$ make clean
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$ make -j8 prof-gen
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...
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$ sapi/cgi/php-cgi -T 1000 /var/www/wordpress/index.php > /dev/null
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$ make prof-clean
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$ make -j8 prof-use</code></pre>
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</section> </section>
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<section>
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<section id="smemwp">
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<div id="smemwp_container" class="stretch" style="margin: 0 auto"></div>
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<script src="presentations/slides/intro/smemwp2017.js"></script>
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</section> </section>
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<section>
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<section id="prod_perc95">
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<h2 margin-bottom="2em">PHP 7 in production</h2><br>
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<img src="/presentations/slides/intro/perc95.png" align="center" width="882" height="465">
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</section>
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<section id="prod_cpu">
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<img src="/presentations/slides/intro/cpu.png" align="center" width="882" height="465">
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</section>
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<section id="prod_mem">
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<img src="/presentations/slides/intro/mem.png" align="center" width="882" height="465">
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</section> </section>
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<section>
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<section id="impact">
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<h1 style="text-align:center;">Saving the Planet?</h1>
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</section>
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<section id="impact1">
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<ul>
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<li style="font-size: 1.5em;margin-left: -1em;">Around 2 billion sites on the web</li>
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<li style="font-size: 1.5em;margin-left: -1em;">On 10 million physical machines</li>
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<li style="font-size: 1.5em;margin-left: -1em;">PHP drives at least 50%</li>
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</ul>
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</section>
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<section id="impact2">
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<ul>
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<li style="font-size: 1.5em;margin-left: -1em;">Currently ~5% PHP 7 Adoption</li>
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<li style="font-size: 1.5em;margin-left: -1em;">which is about 250k physical servers</li>
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</ul>
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</section>
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<section id="impact3">
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<ul>
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<li style="font-size: 1.5em;margin-left: -1em;">3000 KWH/year per server costs approx. US$400</li>
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<li style="font-size: 1.5em;margin-left: -1em;">Data center cooling doubles that</li>
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<li style="font-size: 1.5em;margin-left: -1em;">0.5kg CO2 per KWH</li>
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</ul>
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</section>
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<section id="impact4">
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<p class="p" style="font-size:2em;text-align:left;">At 5% Adoption</p>
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<ul>
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<li style="font-size: 1.5em;margin-left: -1em;">US $200M savings</li>
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<li style="font-size: 1.5em;margin-left: -1em;">750M KWH Savings</li>
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<li style="font-size: 1.5em;margin-left: -1em;">375M kg less CO2</li>
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</ul>
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</section>
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<section id="impact5">
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<p class="p" style="font-size:2em;text-align:left;">At 100% Adoption</p>
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<ul>
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<li style="font-size: 1.5em;margin-left: -1em;">$4B savings</li>
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<li style="font-size: 1.5em;margin-left: -1em;">15B KWH Savings</li>
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<li style="font-size: 1.5em;margin-left: -1em;">7.5B kg less CO2</li>
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</ul>
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||
</section>
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||
<section id="impact6">
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<h1 style="text-align:center;">Do your part</h1>
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<h1 style="text-align:center;">Upgrade to PHP 7!</h1>
|
||
</section> </section>
|
||
<section>
|
||
<section id="php7">
|
||
<img src="/presentations/slides/intro/php7trans-200.png" width="" height="">
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||
<p class="p" style="font-size:1.1em;text-align:left;">engine improvements</p>
|
||
<ul>
|
||
<li style="font-size: 1em;">100%+ performance gain on most real-world applications</li>
|
||
<li style="font-size: 1em;">Lower memory usage, sometimes drastically lower</li>
|
||
</ul>
|
||
</section>
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<section id="php7excep">
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<p class="p" style="font-size:1.1em;text-align:left;">Exceptions on Fatals</p>
|
||
<pre><code data-trim style="font-size:1.1em;" >function call_method($obj) {
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$obj->method();
|
||
}
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call_method(null);</code></pre>
|
||
<pre><code class="shell nohighlight" data-trim style="font-size:0.85em;" >Fatal error: Uncaught Error: Call to a member function method() on null in file:2
|
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Stack trace:
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#0 file(4): call_method(NULL)
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#1 {main}
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thrown in file on line 2</code></pre>
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||
<pre><code data-trim style="font-size:1.1em;" >try {
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call_method(null);
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} catch (Error $e) {
|
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echo "Caught Exception: {$e->getMessage()}\n";
|
||
}</code></pre>
|
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<pre><code class="shell nohighlight" data-trim style="font-size:0.85em;" >Caught Exception: Call to a member function method() on null</code></pre>
|
||
</section>
|
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<section id="php7hier">
|
||
<p class="p" style="font-size:2em;text-align:center;">PHP 7 Exception Hierarchy</p>
|
||
<br/>
|
||
<ul>
|
||
<li style="font-size: 1.5em;list-style-type: none;"><font color="ab5c5c">Throwable</font></li>
|
||
<li style="font-size: 1.25em;margin-left: 2em;list-style-type: none;">➥ <font color="ab5c5c">Exception</font> implements Throwable</li>
|
||
<li style="font-size: 1.25em;margin-left: 2em;list-style-type: none;">➥ <font color="ab5c5c">Error</font> implements Throwable</li>
|
||
<li style="font-size: 1em;margin-left: 4em;list-style-type: none;">➥ <font color="ab5c5c">TypeError</font> extends Error</li>
|
||
<li style="font-size: 1em;margin-left: 4em;list-style-type: none;">➥ <font color="ab5c5c">ParseError</font> extends Error</li>
|
||
</ul>
|
||
</section>
|
||
<section id="php7ret">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">Return Types</p>
|
||
<pre><code data-trim style="font-size:1.1em;" >function get_config(): array {
|
||
return 42;
|
||
}
|
||
get_config();</code></pre>
|
||
<pre><code class="shell nohighlight" data-trim style="font-size:0.9em;" >Fatal error: Uncaught TypeError: Return value of get_config() must be
|
||
of the type array, integer returned in file:2
|
||
Stack trace:
|
||
#0 file(4): get_config()
|
||
#1 {main}
|
||
thrown in file on line 2</code></pre>
|
||
</section>
|
||
<section id="php7STH">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">Coercive Scalar Types</p>
|
||
<pre><code data-trim style="font-size:1.1em;" >function logmsg(string $msg, int $level, float $severity) {
|
||
var_dump($msg); // string(1) "1"
|
||
var_dump($level); // int(2)
|
||
var_dump($severity); // float(3)
|
||
}
|
||
logmsg(1, "2.5 bananas", 3);</code></pre>
|
||
<pre><code class="shell nohighlight" data-trim style="font-size:0.9em;" >Notice: A non well formed numeric value encountered in file on line 2</code></pre>
|
||
<p class="p" style="font-size:1.1em;text-align:left;">Strict Scalar Types</p>
|
||
<pre><code data-trim style="font-size:1.1em;" >declare(strict_types=1);
|
||
...
|
||
logmsg(1, "2.5", 3);</code></pre>
|
||
<pre><code class="shell nohighlight" data-trim style="font-size:0.9em;" >Fatal error: Uncaught TypeError: Argument 1 passed to logmsg() must be of the
|
||
type string, integer given, called in file on line 7 and defined in file:3
|
||
Stack trace:
|
||
#0 file(7): logmsg(1, '2.5', 3)
|
||
#1 {main}
|
||
thrown in file on line 2</code></pre>
|
||
</section>
|
||
<section id="php7anon">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">Anonymous Classes</p>
|
||
<pre><code data-trim style="font-size:1.2em;" >return new class($controller) implements Page {
|
||
public function __construct($controller) {
|
||
/* ... */
|
||
}
|
||
/* ... */
|
||
};
|
||
|
||
class MyObject extends MyStuff {
|
||
public function getInterface() {
|
||
return new class implements MyInterface {
|
||
/* ... */
|
||
};
|
||
}
|
||
}</code></pre>
|
||
</section>
|
||
<section id="php7coalesce">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">Coalesce Operator</p>
|
||
<pre><code data-trim style="font-size:1.5em;" >$a = NULL;
|
||
$b = 0;
|
||
$c = 2;
|
||
|
||
echo $a ?? $b; // 0
|
||
echo $c ?? $b; // 2
|
||
echo $a ?? $b ?? $c; // 0
|
||
echo $a ?? $x ?? $c; // 2</code></pre>
|
||
</section>
|
||
<section id="Spaceship">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">Spaceship Operator</p>
|
||
<img src="/presentations/slides/intro/lego-php-astronaut.png" width="230" height="345">
|
||
<pre><code data-trim style="font-size:1.1em;" >function cmp_php5($a, $b) {
|
||
return ($a < $b) ? -1 : (($a >$b) ? 1 : 0);
|
||
}
|
||
|
||
function cmp_php7($a, $b) {
|
||
return $a <=> $b;
|
||
}</code></pre>
|
||
</section>
|
||
<section id="php7cleanups">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">Removal of many deprecated features<BR/>
|
||
(Your PHP4 code will break!)</p>
|
||
<pre><code data-trim >- ext/ereg (use ext/pcre instead)
|
||
- preg_replace() eval modifier (use preg_replace_callback() instead)
|
||
- ext/mysql (use ext/mysqli or ext/pdo_mysql instead)
|
||
- Assignment of new by reference
|
||
- Scoped calls of non-static methods from incompatible $this context
|
||
|
||
- dl() in php-fpm
|
||
- set_magic_quotes_runtime() and magic_quotes_runtime()
|
||
- set_socket_blocking() (use stream_set_blocking() instead)
|
||
- mcrypt_generic_end() (use mcrypt_generic_deinit() instead)
|
||
- mcrypt_ecb, mcrypt_cbc, mcrypt_cfb and mcrypt_ofb
|
||
(use mcrypt_encrypt() and mcrypt_decrypt() instead)
|
||
- datefmt_set_timezone_id() and IntlDateFormatter::setTimeZoneID()
|
||
(use datefmt_set_timezone() or IntlDateFormatter::setTimeZone() instead)
|
||
|
||
- xsl.security_prefs (use XsltProcessor::setSecurityPrefs() instead)
|
||
- iconv.input_encoding, iconv.output_encoding, iconv.internal_encoding,
|
||
mbstring.http_input, mbstring.http_output and mbstring.internal_encoding
|
||
(use php.input_encoding, php.internal_encoding and php.output_encoding instead)
|
||
|
||
- $is_dst parameter of the mktime() and gmmktime() functions
|
||
- # style comments in ini files (use ; style comments instead)
|
||
- String category names in setlocale() (use LC_* constants instead)
|
||
- Unsafe curl file uploads (use CurlFile instead)
|
||
- PDO::PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT driver option
|
||
(use PDO::ATTR_EMULATE_PREPARES instead)
|
||
- CN_match and SNI_server_name stream context option (use peer_name instead)</code></pre>
|
||
</section>
|
||
<section id="php7reserved">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">New reserved words:</p>
|
||
<ul>
|
||
<li style="font-size: 1em;list-style-type: none;">bool</li>
|
||
<li style="font-size: 1em;list-style-type: none;">int</li>
|
||
<li style="font-size: 1em;list-style-type: none;">float</li>
|
||
<li style="font-size: 1em;list-style-type: none;">string</li>
|
||
<li style="font-size: 1em;list-style-type: none;">null</li>
|
||
<li style="font-size: 1em;list-style-type: none;">false</li>
|
||
<li style="font-size: 1em;list-style-type: none;">true</li>
|
||
<li style="font-size: 1em;list-style-type: none;">resource</li>
|
||
<li style="font-size: 1em;list-style-type: none;">object</li>
|
||
<li style="font-size: 1em;list-style-type: none;">mixed</li>
|
||
<li style="font-size: 1em;list-style-type: none;">numeric</li>
|
||
</ul>
|
||
</section>
|
||
<section id="php7num">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">64-bit integer support on Windows</p>
|
||
<p class="p" style="font-size:1.1em;text-align:left;">Cleanup edge-case integer overflow/underflow</p>
|
||
<p class="p" style="font-size:1.1em;text-align:left;">Support for strings with length >= 2^31 bytes in 64 bit builds.</p>
|
||
<p class="p" style="font-size:1.1em;text-align:left;">Parse error on invalid numeric literals</p>
|
||
<pre><code data-trim >$mask = 0855; // Parse error: Invalid numeric literal</code></pre>
|
||
</section>
|
||
<section id="php7UVS">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">Uniform variable syntax</p>
|
||
<pre><code data-trim >// left-to-right
|
||
$this->$belongs_to['column']
|
||
// vs.
|
||
$this->{$belongs_to['column']}
|
||
|
||
// support missing combinations of operations
|
||
$foo()['bar']()
|
||
[$obj1, $obj2][0]->prop
|
||
getStr(){0}
|
||
|
||
// support nested ::
|
||
$foo['bar']::$baz
|
||
$foo::$bar::$baz
|
||
$foo->bar()::baz()
|
||
|
||
// support nested ()
|
||
foo()()
|
||
$foo->bar()()
|
||
Foo::bar()()
|
||
$foo()()
|
||
|
||
// support operations on arbitrary (...) expressions
|
||
(...)['foo']
|
||
(...)->foo
|
||
(...)->foo()
|
||
(...)::$foo
|
||
(...)::foo()
|
||
(...)()
|
||
|
||
// two more practical examples for the last point
|
||
(function() { ... })()
|
||
($obj->closure)()
|
||
|
||
// support all operations on dereferencable scalars
|
||
// (not very useful)
|
||
"string"->toLower()
|
||
[$obj, 'method']()
|
||
'Foo'::$bar</code></pre>
|
||
</section>
|
||
<section id="php7unicode">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">Unicode Codepoint Escape Syntax</p>
|
||
<pre><code data-trim style="font-size:1.2em;" >echo "\u{202E}Right-to-left text";
|
||
|
||
echo " \u{26BD}";</code></pre>
|
||
<pre class="output" style="font-size:1.2em;">Right-to-left text ⚽ </pre> <p class="p" style="font-size:1.1em;text-align:left;">ICU IntlChar class added to intl extension</p>
|
||
</section>
|
||
<section id="php7csprng">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">CSPRNG</p>
|
||
<pre><code data-trim style="font-size:1.2em;" >$int = random_int(-500, 500);
|
||
$bytes = random_bytes(10);
|
||
|
||
var_dump( $int );
|
||
var_dump( bin2hex($bytes) );</code></pre>
|
||
<pre class="output" style="font-size:1.2em;">int(226)
|
||
string(20) "84748d59da7b3040901b"
|
||
</pre> </section> </section>
|
||
<section>
|
||
<section id="php71">
|
||
<h1 style="text-align:center;">PHP 7.1</h1>
|
||
</section>
|
||
<section id="php71_void">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">void return type</p>
|
||
<pre><code data-trim style="font-size:1.1em;" >function should_return_nothing(): void {
|
||
return 1; // Fatal error: A void function must not return a value
|
||
}</code></pre>
|
||
</section>
|
||
<section id="php71_nullable">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">Nullable types</p>
|
||
<pre><code data-trim style="font-size:1.1em;" >function answer(int $a, ?int $b): ?int {
|
||
if($a > $b) return $a;
|
||
else return null;
|
||
}</code></pre>
|
||
</section>
|
||
<section id="php71iterable">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">Iterable pseudo-type</p>
|
||
<pre><code data-trim style="font-size:1.1em;" >function foo(iterable $iterable) {
|
||
foreach ($iterable as $value) {
|
||
// ...
|
||
}
|
||
}
|
||
function bar(): iterable {
|
||
return [1, 2, 3];
|
||
}</code></pre>
|
||
</section>
|
||
<section id="php71neg">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">Negative string offsets</p>
|
||
<pre><code data-trim style="font-size:1.1em;" >$str='abcdef';
|
||
var_dump($str[-2]); // => string(1) "e"</code></pre>
|
||
</section>
|
||
<section id="php71list">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">List keys</p>
|
||
<pre><code data-trim style="font-size:1.1em;" >list($first, $second, $third) = [1, 2, 3];
|
||
[$first, $second, $third] = [1, 2, 3];</code></pre>
|
||
</section>
|
||
<section id="php71arith">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">Warn about invalid strings in arithmetic</p>
|
||
<pre><code data-trim style="font-size:1.1em;" >$numberOfApples = "10 apples" + "5 pears";</code></pre>
|
||
<pre><code class="shell nohighlight" data-trim style="font-size:0.9em;" >Notice: A non well formed numeric string encountered in example.php on line 2
|
||
Notice: A non well formed numeric string encountered in example.php on line 2</code></pre>
|
||
</section>
|
||
<section id="php71classconst">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">Class constant visibility</p>
|
||
<pre><code data-trim style="font-size:1.2em;" >class Token {
|
||
// Constants default to public
|
||
const PUBLIC_CONST = 0;
|
||
|
||
private const PRIVATE_CONST = 0;
|
||
protected const PROTECTED_CONST = 0;
|
||
public const PUBLIC_CONST_TWO = 0;</code></pre>
|
||
</section>
|
||
<section id="php71cleanups">
|
||
<p class="p" style="font-size:1.1em;text-align:left;">Things that may break your code</p>
|
||
<ul>
|
||
<li style="font-size: 0.8em;margin-left: -1em;">new 'void' and 'iterable' keywords</li>
|
||
<li style="font-size: 0.8em;margin-left: -1em;">rand() and srand() are now aliased to mt_rand() and mt_srand()</li>
|
||
<li style="font-size: 0.8em;margin-left: -1em;">Mersenne Twister algorithm has been tweaked</li>
|
||
<li style="font-size: 0.8em;margin-left: -1em;">Calling a function with too few args is now an Error instead of a Warning</li>
|
||
<li style="font-size: 0.8em;margin-left: -1em;">Dropped support for sslv2 streams</li>
|
||
<li style="font-size: 0.8em;margin-left: -1em;">Dropped support for mcrypt</li>
|
||
</ul>
|
||
</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/etsy/phan" target="">github.com/etsy/phan</a></div>
|
||
</section>
|
||
<section id="phan1">
|
||
<p class="p" style="font-size:1.5em;text-align:left;">It can catch dumb mistakes</p>
|
||
<pre><code class="line-numbers" data-trim style="font-size:1em;" data-highlight-lines='2'>$a = [1,2,3];
|
||
if(count($a > 1)) {
|
||
echo "Test";
|
||
}</code></pre>
|
||
<pre><code class="shell nohighlight" data-trim style="font-size:.75em;" >% phan test.php
|
||
test.php:2 PhanTypeComparisonFromArray array to int comparison</code></pre>
|
||
</section>
|
||
<section id="phan2">
|
||
<p class="p" style="font-size:1.5em;text-align:left;">Check phpdoc comments</p>
|
||
<pre><code class="line-numbers" data-trim style="font-size:.75em;" data-highlight-lines='10,11'>class C {
|
||
/** @var int $prop */
|
||
public $prop;
|
||
|
||
/**
|
||
* @param string $arg
|
||
* @return int
|
||
*/
|
||
function test($arg) {
|
||
$this->prop = $arg;
|
||
return $arg;
|
||
}
|
||
}</code></pre>
|
||
<pre><code class="shell nohighlight" data-trim style="font-size:.75em;" >% phan test.php
|
||
test.php:10 PhanTypeMismatchProperty Assigning string to property but \C::prop is int
|
||
test.php:11 PhanTypeMismatchReturn Returning type string but test() is declared to return int</code></pre>
|
||
</section>
|
||
<section id="phan3">
|
||
<p class="p" style="font-size:1.5em;text-align:left;">Help with refactoring</p>
|
||
<pre><code class="line-numbers" data-trim style="font-size:1em;" data-highlight-lines='8'>class C {
|
||
/**
|
||
* @deprecated
|
||
*/
|
||
static function legacy_function() { }
|
||
}
|
||
|
||
C::legacy_function();</code></pre>
|
||
<pre><code class="shell nohighlight" data-trim style="font-size:.65em;" >% phan test.php
|
||
test.php:8 PhanDeprecatedFunction Call to deprecated function \C::legacy_function() defined at test.php:5</code></pre>
|
||
</section>
|
||
<section id="phan4">
|
||
<p class="p" style="font-size:1.5em;text-align:left;">Install with composer</p>
|
||
<pre><code class="shell nohighlight" data-trim style="font-size:1em;" >$ composer require --dev etsy/phan</code></pre>
|
||
<p class="p" style="font-size:1.5em;text-align:left;">Create .phan/config.php</p>
|
||
<pre><code data-trim style="font-size:1em;" ><?php
|
||
use \Phan\Issue;
|
||
return [
|
||
'should_visit_all_nodes' => true,
|
||
'minimum_severity' => Issue::SEVERITY_LOW,
|
||
'directory_list' => [ 'src', 'vendor' ],
|
||
'exclude_analysis_directory_list' => [ 'vendor' ]
|
||
];</code></pre>
|
||
<pre><code class="shell nohighlight" data-trim style="font-size:1em;" >$ ./vendor/bin/phan</code></pre>
|
||
</section> </section>
|
||
<section>
|
||
<section id="phan_ts">
|
||
<p class="p" style="font-size:2em;text-align:center;">Type Safety</p>
|
||
<p class="p" style="font-size:1.5em;text-align:left;">Legacy code</p>
|
||
<pre><code data-trim style="font-size:1em;" >class Data {
|
||
function __construct($data) {
|
||
$this->haystack = $data;
|
||
}
|
||
function find($needle) {
|
||
return in_array($needle, $this->haystack, true);
|
||
}
|
||
}
|
||
$storage = new Data(['apple','orange','banana']);
|
||
|
||
$fruit = false;
|
||
$storage->find($fruit);</code></pre>
|
||
</section>
|
||
<section id="phan_ts2">
|
||
<p class="p" style="font-size:1em;text-align:left;">Going straight to strict types risks runtime fatals</p>
|
||
<pre><code class="line-numbers" data-trim style="font-size:1em;" data-highlight-lines='6,13'><?php declare(strict_types=1);
|
||
class Data {
|
||
function __construct(array $data) {
|
||
$this->haystack = $data;
|
||
}
|
||
function find(string $needle):bool {
|
||
return in_array($needle, $this->haystack, true);
|
||
}
|
||
}
|
||
$storage = new Data(['apple','orange','banana']);
|
||
|
||
$fruit = false;
|
||
$storage->find($fruit);</code></pre>
|
||
<pre><code class="shell nohighlight" data-trim style="font-size:.65em;" >Fatal error: Uncaught TypeError: Argument 1 passed to Data::find() must be of the type string, boolean given,
|
||
called in test.php on line 13 and defined in test.php:6
|
||
Stack trace:
|
||
#0 test.php(13): Data->find(false)
|
||
#1 {main}
|
||
thrown in test.php on line 6</code></pre>
|
||
</section>
|
||
<section id="phan_ts3">
|
||
<p class="p" style="font-size:1em;text-align:left;">Intermediate step</p>
|
||
<pre><code class="line-numbers" data-trim style="font-size:.75em;" data-highlight-lines='15,22'>class Data {
|
||
/** @var array $haystack */
|
||
public $haystack;
|
||
|
||
/**
|
||
* @param array $data
|
||
*/
|
||
function __construct($data) {
|
||
$this->haystack = $data;
|
||
}
|
||
/**
|
||
* @param string $needle
|
||
* @return bool
|
||
*/
|
||
function find($needle) {
|
||
return in_array($needle, $this->haystack, true);
|
||
}
|
||
}
|
||
$storage = new Data(['apple','orange','banana']);
|
||
|
||
$fruit = false;
|
||
$storage->find($fruit);</code></pre>
|
||
<pre><code class="shell nohighlight" data-trim style="font-size:.65em;" >$ phan test.php
|
||
test.php:22 PhanTypeMismatchArgument Argument 1 (needle) is bool but \Data::find() takes string defined at test.php:15</code></pre>
|
||
</section> </section>
|
||
<section>
|
||
<section id="thank_you">
|
||
<h2 style="text-align:center;">Thank You</h2>
|
||
<div align="left" style="font-size: 1.2em; color: ; text-align: left; margin-left: 2em; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://github.com/rlerdorf/phan" target="">https://github.com/rlerdorf/phan</a></div>
|
||
<div align="left" style="font-size: 1.2em; color: ; text-align: left; margin-left: 2em; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://bugs.php.net" target="">https://bugs.php.net</a></div>
|
||
<div align="left" style="font-size: 1.2em; color: ; text-align: left; margin-left: 2em; margin-right: ; margin-top: ; margin-bottom: ;"><a href=":-:url:-:" target="">http://talks.php.net/vienna17</a></div>
|
||
<br/>
|
||
<br/>
|
||
<br/>
|
||
<p class="p" style="font-size:1.1em;">Report Bugs</p>
|
||
<p class="p" style="font-size:1.1em;">Useful bug reports, please!</p>
|
||
</section> </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>
|