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archived-presentations/curitiba.html
Rasmus Lerdorf e0c66cb323 tweak
2018-10-06 14:28:38 -03:00

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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>PHP in 2018</title>
<meta name="description" content="PHP in 2018">
<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">
<!-- 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 -->
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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>PHP in 2018</h1>
<h3>PHP Day Curitiba</h3>
<h3>Curitiba</h3>
<h3>Oct.6, 2018</h3>
<a href="http://talks.php.net/curitiba">http://talks.php.net/curitiba</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/rasmus.jpg" align="center" width="" height="">
</section>
<section id="s2">
<img src="/presentations/slides/intro/g_dogsled.jpg" align="center" width="" height="">
</section>
<section id="s3">
<img src="/presentations/slides/intro/Greenland1.jpg" align="center" width="" height="">
</section>
<section id="s4">
<img src="/presentations/slides/intro/Greenland2.jpg" align="center" width="" height="">
</section>
<section id="s5">
<img src="/presentations/slides/intro/Greenland3.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 &lt;stdio.h&gt;
#include &lt;stdlib.h&gt;
#include &lt;ctype.h&gt;
#include &lt;string.h&gt;
#define ishex(x) (((x) &gt;= '0' &amp;&amp; (x) &lt;= '9') || ((x) &gt;= 'a' &amp;&amp; \
(x) &lt;= 'f') || ((x) &gt;= 'A' &amp;&amp; (x) &lt;= 'F'))
int htoi(char *s) {
int value;
char c;
c = s[0];
if(isupper(c)) c = tolower(c);
value=(c &gt;= '0' &amp;&amp; c &lt;= '9' ? c - '0' : c - 'a' + 10) * 16;
c = s[1];
if(isupper(c)) c = tolower(c);
value += c &gt;= '0' &amp;&amp; c &lt;= '9' ? c - '0' : c - 'a' + 10;
return(value);
}
void main(int argc, char *argv[]) {
char *params, *data, *dest, *s, *tmp;
char *name, *age;
puts(&quot;Content-type: text/html\r\n&quot;);
puts(&quot;&lt;HTML&gt;&lt;HEAD&gt;&lt;TITLE&gt;Form Example&lt;/TITLE&gt;&lt;/HEAD&gt;&quot;);
puts(&quot;&lt;BODY&gt;&lt;H1&gt;My Example Form&lt;/H1&gt;&quot;);
puts(&quot;&lt;FORM action=\&quot;form.cgi\&quot; method=\&quot;GET\&quot;&gt;&quot;);
puts(&quot;Name: &lt;INPUT type=\&quot;text\&quot; name=\&quot;name\&quot;&gt;&quot;);
puts(&quot;Age: &lt;INPUT type=\&quot;text\&quot; name=\&quot;age\&quot;&gt;&quot;);
puts(&quot;&lt;BR&gt;&lt;INPUT type=\&quot;submit\&quot;&gt;&quot;);
puts(&quot;&lt;/FORM&gt;&quot;);
data = getenv(&quot;QUERY_STRING&quot;);
if(data &amp;&amp; *data) {
params = data; dest = data;
while(*data) {
if(*data=='+') *dest=' ';
else if(*data == '%' &amp;&amp; ishex(*(data+1))&amp;&amp;ishex(*(data+2))) {
*dest = (char) htoi(data + 1);
data+=2;
} else *dest = *data;
data++;
dest++;
}
*dest = '\0';
s = strtok(params,&quot;&amp;&quot;);
do {
tmp = strchr(s,'=');
if(tmp) {
*tmp = '\0';
if(!strcmp(s,&quot;name&quot;)) name = tmp+1;
else if(!strcmp(s,&quot;age&quot;)) age = tmp+1;
}
} while(s=strtok(NULL,&quot;&amp;&quot;));
printf(&quot;Hi %s, you are %s years old\n&quot;,name,age);
}
puts(&quot;&lt;/BODY&gt;&lt;/HTML&gt;&quot;);
}</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,
&quot;Name: &quot;, textfield('name'),
p,
&quot;Age: &quot;, textfield('age'),
p,
submit,
end_form;
if(param()) {
print &quot;Hi &quot;,em(param('name')),
&quot;You are &quot;,em(param('age')),
&quot; years old&quot;;
}
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 >&lt;html&gt;&lt;head&gt;&lt;title&gt;Form Example&lt;/title&gt;&lt;/head&gt;
&lt;body&gt;&lt;h1&gt;My Example Form&lt;/h1&gt;
&lt;form action=&quot;form.phtml&quot; method=&quot;POST&quot;&gt;
Name: &lt;input type=&quot;text&quot; name=&quot;name&quot;&gt;
Age: &lt;input type=&quot;text&quot; name=&quot;age&quot;&gt;
&lt;br&gt;&lt;input type=&quot;submit&quot;&gt;
&lt;/form&gt;
&lt;?if($name):?&gt;
Hi &lt;?echo $name?&gt;, you are &lt;?echo $age?&gt; years old
&lt;?endif?&gt;
&lt;/body&gt;&lt;/html&gt;</code></pre>
</section> </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>
<section id="php73">
<h1 style="text-align:center;">PHP 7.3</h1>
</section>
<section id="php73_heredoc">
<p class="p" style="font-size:1.1em;text-align:left;">Flexible Heredoc</p>
<pre><code data-trim style="font-size:1.1em;" >class foo {
public $bar = &lt;&lt;&lt;EOT
bar
EOT;
}</code></pre>
</section>
<section id="php73_continue">
<p class="p" style="font-size:1.1em;text-align:left;">Continue in Switch</p>
<pre><code data-trim style="font-size:1.1em;" >while ($foo) {
switch ($bar) {
case &quot;baz&quot;:
continue;
}
}</code></pre>
<pre><code class="nohighlight" data-trim style="font-size:1.1em;" >Warning: &quot;continue&quot; targeting switch is equivalent to &quot;break&quot;.
Did you mean to use &quot;continue 2&quot;?</code></pre>
</section>
<section id="php73_listrefs">
<p class="p" style="font-size:1.1em;text-align:left;">List References</p>
<pre><code data-trim style="font-size:1.1em;" >$array = [1, 2];
list($a, &amp;$b) = $array;
// or
[$a, &amp;$b] = $array;</code></pre>
</section>
<section id="php73_commas">
<p class="p" style="font-size:1.1em;text-align:left;">Trailing comma allowed in function calls</p>
<pre><code data-trim style="font-size:1.1em;" >$newArray = array_merge(
$arrayOne,
$arrayTwo,
['foo', 'bar'],
);
# Parse error
function bar($a, $b,) { }
# Parse error
foo(,);
# Parse error
foo('function', 'bar',,);
# Also parse error
foo(, 'function', 'bar');</code></pre>
</section>
<section id="php73_hrtime">
<p class="p" style="font-size:1.1em;text-align:left;">New Monotonic Timer function</p>
<pre><code data-trim style="font-size:1.0em;" >php &gt; print_r(hrtime());
Array
(
[0] =&gt; 2320165 // seconds
[1] =&gt; 979969517 // nanoseconds
)
php &gt; print_r(hrtime(true));
2320183081647424</code></pre>
</section>
<section id="php73_fpm_status">
<p class="p" style="font-size:1.1em;text-align:left;">New fpm_get_status() function</p>
<pre><code data-trim style="font-size:1.1em;" >print_r(fpm_get_status());
Array (
[pool] =&gt; www
[process-manager] =&gt; static
[start-time] =&gt; 1536934549
[start-since] =&gt; 26
[accepted-conn] =&gt; 20039
[listen-queue] =&gt; 0
[max-listen-queue] =&gt; 0
[listen-queue-len] =&gt; 0
[idle-processes] =&gt; 0
[active-processes] =&gt; 47
[total-processes] =&gt; 47
[max-active-processes] =&gt; 514
[max-children-reached] =&gt; 0
[slow-requests] =&gt; 0
[procs] =&gt; Array (
[0] =&gt; Array (
[pid] =&gt; 10819
[state] =&gt; Running
[start-time] =&gt; 1536934549
[start-since] =&gt; 26
[requests] =&gt; 2001
[request-duration] =&gt; 8108
[request-method] =&gt; GET
[request-uri] =&gt; /index.php
[query-string] =&gt; p=1
[request-length] =&gt; 0
[user] =&gt; -
[script] =&gt; /var/www/wordpress/index.php
[last-request-cpu] =&gt; 0
[last-request-memory] =&gt; 0
)
...</code></pre>
</section>
<section id="php73_iscountable">
<p class="p" style="font-size:1.1em;text-align:left;">is_countable()</p>
<pre><code data-trim style="font-size:1.1em;" >if (is_array($foo) || $foo instanceof Countable) {
// $foo is countable
}
if (is_countable($foo)) {
// $foo is countable
}</code></pre>
</section>
<section id="php73_array_key">
<p class="p" style="font-size:1.1em;text-align:left;">array_key_first()/array_key_last()</p>
<pre><code data-trim style="font-size:1.1em;" >$a = ['abc'=&gt;'First', 'def'=&gt;'Second', 'ghi'=&gt;'Third'];
echo array_key_first($a);
// abc
echo array_key_last($a);
// ghi</code></pre>
</section>
<section id="php73_opt">
<p class="p" style="font-size:1.6em;text-align:left;">DCE and SCCP optimizations</p>
</section>
<section id="php73misc">
<p class="p" style="font-size:1.1em;text-align:left;">Other changes</p>
<ul>
<li style="font-size: 0.8em;margin-left: -1em;">Upgraded from PCRE to PCRE2</li>
<li style="font-size: 0.8em;margin-left: -1em;">getallheaders() now available in php-fpm</li>
<li style="font-size: 0.8em;margin-left: -1em;">full case-mapping for mbstring</li>
<li style="font-size: 0.8em;margin-left: -1em;">preg_quote() now also escapes '#'</li>
<li style="font-size: 0.8em;margin-left: -1em;">new gmp functions: gmp_binomial, gmp_lcm, gmp_perfect_power, gmp_kronecker</li>
<li style="font-size: 0.8em;margin-left: -1em;">new JsonException</li>
<li style="font-size: 0.8em;margin-left: -1em;">default ftp transfer mode is now binary</li>
</ul>
</section>
<section id="php73cleanups">
<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;">PCRE2 differences (should be rare)</li>
<li style="font-size: 0.8em;margin-left: -1em;">ODBCRouter and Birdstep support have been removed</li>
<li style="font-size: 0.8em;margin-left: -1em;">Various deprecations - see UPGRADING</li>
</ul>
<p class="p" style="font-size:1.1em;text-align:left;">Full details are at:</p>
<div align="" style="font-size: 0.8em; color: ; text-align: ; margin-left: -1em; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://github.com/php/php-src/blob/PHP-7.3/UPGRADING" target="">https://github.com/php/php-src/blob/PHP-7.3/UPGRADING</a></div>
<p class="p" style="font-size:1.1em;text-align:left;">And for extension authors:</p>
<div align="" style="font-size: 0.8em; color: ; text-align: ; margin-left: -1em; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://github.com/php/php-src/blob/PHP-7.3/UPGRADING.INTERNALS" target="">https://github.com/php/php-src/blob/PHP-7.3/UPGRADING.INTERNALS</a></div>
</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="dce">
<p class="p" style="font-size:2em;text-align:center;">Dead Code Elimination (DCE)</p>
<p class="p" style="font-size:1.5em;text-align:center;">Escape Analysis</p>
<p class="p" style="font-size:1.4em;text-align:center;">Sparse Conditional Constant Propagation</p>
</section>
<section id="dce0">
<pre><code class="result nohighlight" data-trim style="font-size:0.9em;" >php -d opcache.optimization_level=-1 -d opcache.opt_debug_level=0x20000 script</code></pre>
<pre><code data-trim style="font-size:1.05em;" >function fn() {
$a = 1;
return 0;
}</code></pre>
<p class="p" style="font-size:1.1em;text-align:left;">PHP 7.1</p>
<pre><code class="result nohighlight" data-trim style="font-size:1em;" >fn: (lines=2, args=0, vars=1, tmps=0)
L0: ASSIGN CV0($a) int(1)
L1: RETURN int(0)</code></pre>
<p class="p" style="font-size:1.1em;text-align:left;">PHP 7.2/7.3</p>
<pre><code class="result nohighlight" data-trim style="font-size:1em;" >fn: (lines=1, args=0, vars=0, tmps=0)
L0: RETURN int(0)</code></pre>
</section>
<section id="dce1">
<pre><code data-trim style="font-size:1.05em;" >function foo(string $s1, string $s2, string $s3, string $s4) {
$x = ($s1 . $s2) . ($s3 . $s4);
$x = 0;
return $x;
}</code></pre>
<pre><code class="result nohighlight" data-trim style="font-size:1em;" >PHP 7.1 PHP 7.2/7.3
foo: (lines=10, args=4, vars=5, tmps=3) foo: (lines=5, args=4, vars=4, tmps=0)
L0: CV0($s1) = RECV 1 L0: CV0($s1) = RECV 1
L1: CV1($s2) = RECV 2 L1: CV1($s2) = RECV 2
L2: CV2($s3) = RECV 3 L2: CV2($s3) = RECV 3
L3: CV3($s4) = RECV 4 L3: CV3($s4) = RECV 4
L4: T6 = CONCAT CV0($s1) CV1($s2) L4: RETURN int(0)
L5: T7 = CONCAT CV2($s3) CV3($s4)
L6: T5 = CONCAT T6 T7
L7: ASSIGN CV4($x) T5
L8: ASSIGN CV4($x) int(0)
L9: RETURN CV4($x)</code></pre>
</section>
<section id="dce2">
<p class="p" style="font-size:1.1em;text-align:left;">Try to trick it</p>
<pre><code data-trim style="font-size:1.05em;" >function foo($a) {
$b = $a += 3;
return $a;
}</code></pre>
<p class="p" style="font-size:1.1em;text-align:left;">PHP 7.2/7.3</p>
<pre><code class="result nohighlight" data-trim style="font-size:1em;" >foo: (lines=3, args=1, vars=1, tmps=1)
L0: CV0($a) = RECV 1
L1: ASSIGN_ADD CV0($a) int(3)
L2: RETURN CV0($a)</code></pre>
</section>
<section id="dce3">
<p class="p" style="font-size:1.1em;text-align:left;">But...</p>
<pre><code data-trim style="font-size:1.05em;" >function foo(int $x, int $y) {
$a = [$x];
$a[1] = $y;
$a = $y;
return $a;
}</code></pre>
<pre><code class="result nohighlight" data-trim style="font-size:1em;" >PHP 7.2 PHP 7.3
foo: (lines=7, args=2, vars=3, tmps=1) foo: (lines=4, args=2, vars=3, tmps=0)
L0: CV0($x) = RECV 1 L0: CV0($x) = RECV 1
L1: CV1($y) = RECV 2 L1: CV1($y) = RECV 2
L2: CV2($a) = INIT_ARRAY 1 CV0($x) NEXT L2: CV2($a) = QM_ASSIGN CV1($y)
L3: ASSIGN_DIM CV2($a) int(1) L3: RETURN CV2($a)
L4: OP_DATA CV1($y)
L5: ASSIGN CV2($a) CV1($y)
L6: RETURN CV2($a)</code></pre>
</section>
<section id="dce4">
<pre><code data-trim style="font-size:1.05em;" >class A { }
function foo(int $x) {
$a = new A;
$a-&gt;foo = $x;
return $x;
}</code></pre>
<p class="p" style="font-size:1.1em;text-align:left;">PHP 7.3</p>
<pre><code class="result nohighlight" data-trim style="font-size:1.05em;" >foo: (lines=2, args=1, vars=1, tmps=0)
L0: CV0($x) = RECV 1
L1: RETURN CV0($x)</code></pre>
</section>
<section id="dce5">
<pre><code data-trim style="font-size:1.05em;" >class A {
function __destruct() {}
}
function foo(int $x) {
$a = new A;
$a-&gt;foo = $x;
return $x;
}</code></pre>
<p class="p" style="font-size:1.1em;text-align:left;">PHP 7.3</p>
<pre><code class="result nohighlight" data-trim style="font-size:1.05em;" >foo: (lines=7, args=1, vars=2, tmps=1)
L0: CV0($x) = RECV 1
L1: V2 = NEW 0 string(&quot;A&quot;)
L2: DO_FCALL
L3: CV1($a) = QM_ASSIGN V2
L4: ASSIGN_OBJ CV1($a) string(&quot;foo&quot;)
L5: OP_DATA CV0($x)
L6: RETURN CV0($x)</code></pre>
</section>
<section id="dce6">
<pre><code data-trim style="font-size:1.05em;" >function foo(int $x) {
if ($x) {
$a = [0,1];
} else {
$a = [0,2];
}
return $a[0];
}</code></pre>
<p class="p" style="font-size:1.1em;text-align:left;">PHP 7.3</p>
<pre><code class="result nohighlight" data-trim style="font-size:1.05em;" >foo: (lines=2, args=1, vars=1, tmps=0)
L0: CV0($x) = RECV 1
L1: RETURN int(0)</code></pre>
</section>
<section id="dce7">
<pre><code data-trim style="font-size:1.05em;" >function foo() {
$o = new stdClass();
$o-&gt;foo = 0;
$i = 1;
$c = $i &lt; 2;
if ($c) {
$k = 2 * $i;
$o-&gt;foo = $i;
echo $o-&gt;foo;
}
$o-&gt;foo += 2;
$o-&gt;foo++;
return $o-&gt;foo;
}</code></pre>
<p class="p" style="font-size:1.1em;text-align:left;">PHP 7.3</p>
<pre><code class="result nohighlight" data-trim style="font-size:1.05em;" >foo: (lines=2, args=0, vars=0, tmps=0)
L0: ECHO int(1)
L1: RETURN int(4)</code></pre>
</section> </section>
<section>
<section id="phan">
<h1 style="text-align:center;">Static Analysis</h1>
<br/>
<br/>
<div align="center" style="font-size: 2em; color: ; text-align: center; margin-left: ; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://github.com/phan/phan" target="">github.com/phan/phan</a></div>
</section>
<section id="phan0">
<p class="p" style="font-size:1.5em;text-align:left;">Install with composer</p>
<pre><code class="shell nohighlight" data-trim style="font-size:1em;" >$ 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; '7.2',
'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="phan1">
<p class="p" style="font-size:2em;text-align:left;">Checks</p>
<ul>
<li>enhanced phpdoc type annotations</li>
<li>Everything is defined and accessible</li>
<li>Type safety</li>
<li>PHP version compatibility</li>
<li>No-ops</li>
<li>Unreachable code</li>
<li>Unused use statements</li>
<li>Redefinitions</li>
<li>Signature compatibility and final on inheritance</li>
<li>and many more</li>
</ul>
</section>
<section id="phan2">
<p class="p" style="font-size:1em;text-align:left;">Enhanced PHPDoc type annotations</p>
<pre><code data-trim style="font-size:1em;" >class C {
/**
* @param string|int $union
* @param int[] $generic
* @param array{mode:string,max:int} $shaped
*/
static function fn($union, array $generic, $shaped) { }
}
C::fn(&quot;test&quot;, [1,2,3], ['mode'=&gt;&quot;test&quot;, 'max'=&gt;10]);
C::fn(1, [1,2,3], ['mode'=&gt;&quot;test&quot;, 'max'=&gt;10]);
C::fn(&quot;test&quot;, [1,2,3], ['max'=&gt;10,'mode'=&gt;&quot;test&quot;]);
C::fn([1], [1,2,3], ['mode'=&gt;&quot;test&quot;, 'max'=&gt;10]);
// PhanTypeMismatchArgument Argument 1 (union) is array{0:1}
// but \C::fn() takes int|string
C::fn(&quot;test&quot;, [1,2,3], ['max'=&gt;10]);
// PhanTypeMismatchArgument Argument 3 (shaped) is array{max:10}
// but \C::fn() takes array{mode:string,max:int}</code></pre>
</section>
<section id="phan3">
<p class="p" style="font-size:1.5em;text-align:left;">User plugins</p>
<div align="center" style="font-size: 1.5em; color: ; text-align: center; margin-left: ; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://github.com/phan/phan/wiki/Writing-Plugins-for-Phan" target="">Writing Plugins for Phan</a></div>
<p class="p" style="font-size:1.5em;text-align:left;">Included sample plugins</p>
<ul style="column-count:2;column-gap:1.8em;font-size:0.8em">
<li>Demo Plugin</li>
<li>Preg Regex Checker</li>
<li>Printf Checker</li>
<li>Unreachable Code</li>
<li>DollarDollar</li>
<li>NonBool Branch</li>
<li>Numerical Comparison</li>
<li>Has PHPDoc</li>
<li>Duplicate Expression</li>
</ul>
</section>
<section id="phan4">
<p class="p" style="font-size:2em;text-align:left;">Daemon mode</p>
<pre><code class="shell nohighlight" data-trim style="font-size:1em;" >$ 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>
</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="phpspy">
<h1 style="text-align:center;">phpspy</h1>
<p class="p" style="font-size:1.1em;text-align:center;">Low-overhead sampling profiler</p>
<div align="center" style="font-size: 1em; color: ; text-align: center; margin-left: ; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://github.com/adsr/phpspy" target="">https://github.com/adsr/phpspy</a></div>
</section>
<section id="spy1">
<p class="p" style="font-size:1.1em;text-align:left;">Sample frequency in nanoseconds</p>
<pre><code class="shell nohighlight" data-trim style="font-size:0.9em;" >$ phpspy -s 200000000 -- php -r 'sleep(1);'
0 sleep &lt;internal&gt;:-1
1 &lt;main&gt; &lt;internal&gt;:-1
# - - - - -
0 sleep &lt;internal&gt;:-1
1 &lt;main&gt; &lt;internal&gt;:-1
# - - - - -
0 sleep &lt;internal&gt;:-1
1 &lt;main&gt; &lt;internal&gt;:-1
# - - - - -
0 sleep &lt;internal&gt;:-1
1 &lt;main&gt; &lt;internal&gt;:-1
# - - - - -
0 sleep &lt;internal&gt;:-1
1 &lt;main&gt; &lt;internal&gt;:-1
# - - - - -
process_vm_readv: No such process</code></pre>
</section>
<section id="spy2">
<p class="p" style="font-size:1.1em;text-align:left;">Attach to a running process</p>
<pre><code class="shell nohighlight" data-trim style="font-size:0.9em;" >$ sudo phpspy -r -p $(pgrep -n php-fpm)
0 wp_installing /var/www/wordpress/wp-includes/load.php:944
1 wp_load_alloptions /var/www/wordpress/wp-includes/option.php:189
2 get_option /var/www/wordpress/wp-includes/option.php:90
3 create_initial_taxonomies /var/www/wordpress/wp-includes/taxonomy.php:43
4 WP_Hook::apply_filters /var/www/wordpress/wp-includes/class-wp-hook.php:286
5 WP_Hook::do_action /var/www/wordpress/wp-includes/class-wp-hook.php:310
6 do_action /var/www/wordpress/wp-includes/plugin.php:453
7 &lt;main&gt; /var/www/wordpress/wp-settings.php:450
8 &lt;main&gt; /var/www/wordpress/wp-config.php:89
9 &lt;main&gt; /var/www/wordpress/wp-load.php:37
10 &lt;main&gt; /var/www/wordpress/wp-blog-header.php:13
11 &lt;main&gt; /var/www/wordpress/index.php:17
# 1537119612.459615 /index.php p=1 /var/www/wordpress/index.php -
0 mysqli_query &lt;internal&gt;:-1
1 wpdb::_do_query /var/www/wordpress/wp-includes/wp-db.php:1924
2 wpdb::query /var/www/wordpress/wp-includes/wp-db.php:1813
3 wpdb::get_results /var/www/wordpress/wp-includes/wp-db.php:2488
4 _prime_comment_caches /var/www/wordpress/wp-includes/comment.php:2871
5 WP_Comment_Query::get_comments /var/www/wordpress/wp-includes/class-wp-comment-query.php:427
6 WP_Comment_Query::query /var/www/wordpress/wp-includes/class-wp-comment-query.php:346
7 get_comments /var/www/wordpress/wp-includes/comment.php:226
8 WP_Widget_Recent_Comments::widget /var/www/wordpress/wp-includes/widgets/class-wp-widget-recent-comments.php:99
9 WP_Widget::display_callback /var/www/wordpress/wp-includes/class-wp-widget.php:372
10 dynamic_sidebar /var/www/wordpress/wp-includes/widgets.php:743
11 &lt;main&gt; /var/www/wordpress/wp-content/themes/twentyfifteen/sidebar.php:41
12 load_template /var/www/wordpress/wp-includes/template.php:688
13 locate_template /var/www/wordpress/wp-includes/template.php:647
14 get_sidebar /var/www/wordpress/wp-includes/general-template.php:110
15 &lt;main&gt; /var/www/wordpress/wp-content/themes/twentyfifteen/header.php:49
16 load_template /var/www/wordpress/wp-includes/template.php:688
17 locate_template /var/www/wordpress/wp-includes/template.php:647
18 get_header /var/www/wordpress/wp-includes/general-template.php:41
19 &lt;main&gt; /var/www/wordpress/wp-content/themes/twentyfifteen/single.php:10
20 &lt;main&gt; /var/www/wordpress/wp-includes/template-loader.php:74
21 &lt;main&gt; /var/www/wordpress/wp-blog-header.php:19
22 &lt;main&gt; /var/www/wordpress/index.php:17
# 1537119612.459615 /index.php p=1 /var/www/wordpress/index.php -</code></pre>
</section>
<section id="spy3">
<p class="p" style="font-size:1.1em;text-align:left;">Generate a flame graph</p>
<pre><code class="shell nohighlight" data-trim style="font-size:0.9em;" >$ phpspy phan &gt; /tmp/output
$ cat /tmp/output | stackcollapse-phpspy.pl | flamegraph.pl &gt; flame.svg</code></pre>
</section>
<section id="spy4">
<object data="/presentations/slides/intro/phan.svg" type="image/svg+xml" align="center" width="80%" height="80%">Use a newer browser, please</object>
</section> </section>
<section>
<section id="thank_you">
<h2 style="text-align:center;">Thank You</h2>
<div align="left" style="font-size: 1em; color: ; text-align: left; margin-left: -1em; margin-right: ; margin-top: ; margin-bottom: ;"><a href=":-:url:-:" target="">http://talks.php.net/curitiba</a></div>
<div align="left" style="font-size: 1em; color: ; text-align: left; margin-left: -1em; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://github.com/phan/phan" target="">https://github.com/phan/phan</a></div>
<div align="left" style="font-size: 1em; color: ; text-align: left; margin-left: -1em; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://github.com/adsr/phpspy" target="">https://github.com/adsr/phpspy</a></div>
<div align="left" style="font-size: 1em; color: ; text-align: left; margin-left: -1em; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://github.com/php/php-src/blob/PHP-7.3/UPGRADING" target="">https://github.com/php/php-src/blob/PHP-7.3/UPGRADING</a></div>
<div align="left" style="font-size: 1em; color: ; text-align: left; margin-left: -1em; margin-right: ; margin-top: ; margin-bottom: ;"><a href="https://bugs.php.net" target="">https://bugs.php.net</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>
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<script src="/reveal.js/js/reveal.js"></script>
<script>
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