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350 lines
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HTML
350 lines
13 KiB
HTML
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<title>PHP</title>
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<meta name="description" content="PHP">
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<meta name="author" content="Rasmus Lerdorf">
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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</h1>
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<h3>phpday.it</h3>
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<h3>Verona</h3>
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<h3>May 16, 2014</h3>
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<a href="http://talks.php.net/phpday14">http://talks.php.net/phpday14</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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</section>
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<section data-background="#000000">
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<img src="/presentations/slides/intro/fiat.jpg" width="800" height="597">
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</section>
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<section>
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<section id="performance">
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<h2 margin-bottom="2em">PHP 5.5</h2><br>
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<h3 class="p">Performance Improvements</h3>
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<ul>
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<li>Nested calls</li>
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<li>Call stack pre-allocated by compiler</li>
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<li>Bundled opcode cache</li>
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</ul>
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</section>
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<section id="generators">
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<h4 class="p">✔ Generators</h4>
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<pre><code>function xrange($start, $end) {
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for ($i = $start; $i <= $end; $i ++) {
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yield $i;
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}
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}
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foreach (xrange(0, 5) as $i) {
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echo $i, "\n";
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}</code></pre>
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</section>
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<section id="coroutines">
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<h4 class="p">✔ Coroutines</h4>
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<pre><code>function logger($fileName) {
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$fileHandle = fopen($fileName, 'a');
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while (true) {
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fwrite($fileHandle, yield . "\n");
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}
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}
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$logger = logger(__DIR__ . '/log');
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$logger->send('Foo');
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$logger->send('Bar');</code></pre>
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<p class="p">For an advanced explanation of coroutines, read this article by Nikita Popov</p>
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<div align="" style="font-size: ; color: ; margin-left: ; margin-right: ; margin-top: ; margin-bottom: ;"><a href="http://nikic.github.io/2012/12/22/Cooperative-multitasking-using-coroutines-in-PHP.html" target="">Cooperative multitasking using coroutines</a></div><br />
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</section>
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<section id="finally">
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<h4 class="p">✔ finally</h4>
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<pre><code>$db = mysqli_connect();
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try {
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call_some_function($db);
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} finally {
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mysqli_close($db);
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}</code></pre>
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</section>
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<section id="foreachlist">
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<h4 class="p">✔ list() in foreach</h4>
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<pre><code>$names = [ ['John','Smith'], ['Fred','Johnson'] ];
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foreach($names as list($first,$last)) {
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echo $first,$last;
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}</code></pre>
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</section>
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<section id="constarray">
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<h4 class="p">✔ Const array/string Dereferencing</h4>
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<pre><code>echo array(1, 2, 3)[0]; //output 1
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echo "foobar"[3]; //output b
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echo [1,3,4][2]; //output 4</code></pre>
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</section>
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<section id="others">
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<h4 class="p">✔ empty() support for functions/expressions</h4>
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<h4 class="p">✔ curl upload functionality rewritten</h4>
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<h4 class="p">✔ Simplified password hashing API</h4>
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<pre><code>// Hash
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$hash = password_hash("super secret",PASSWORD_BCRYPT);
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// To validate $pwd against the stored hash
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if (password_verify($pwd, $hash)) {
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echo 'Password is valid!';
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} else {
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echo 'Invalid password.';
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}</code></pre>
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</section>
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<section id="php55_done">
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<div align="" style="font-size: ; color: ; margin-left: ; margin-right: ; margin-top: ; margin-bottom: ;"><a href="http://php.net/migration55" target="">php.net/migration55</a></div><br />
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</section> </section>
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<section>
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<section id="php56">
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<h2 margin-bottom="2em">PHP 5.6</h2><br>
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<div align="" style="font-size: 2em; color: ; margin-left: 0em; margin-right: ; margin-top: ; margin-bottom: ;"><a href="http://php.net/spec" target="">http://php.net/spec</a></div><br />
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</section>
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<section id="php56variadic">
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<h4 class="p">✔ Variadic functions</h4>
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<pre><code>class MySQL implements DB {
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public function query($query, ...$params) {
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$stmt = $this->pdo->prepare($query);
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$stmt->execute($params);
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return $stmt;
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}
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}
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$q = 'SELECT * FROM users WHERE id = ?';
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$user = $db->query($q, $userID)->fetch();</code></pre>
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</section>
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<section id="php56unpack">
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<h4 class="p">✔ Argument Unpacking</h4>
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<pre><code>// A better call_user_func_args
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$args1 = [1, 2, 3];
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$args2 = [4, 5, 6];
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test(...$args1, ...$args2); // [1, 2, 3, 4, 5, 6]
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test(1, 2, 3, ...$args2); // [1, 2, 3, 4, 5, 6]
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test(...$args1, 4, 5, 6); // Fatal error: Cannot use positional argument after argument unpacking</code></pre>
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</section>
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<section id="php56constscalar">
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<h4 class="p">✔ Constant scalar expressions</h4>
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<pre><code>class Foo {
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const FOO = 1 + 1;
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const BAR = 1 << 1;
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const GREETING = "HELLO";
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const BAZ = self::GREETING." WORLD!"
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}</code></pre>
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</section>
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<section id="php56pow">
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<h4 class="p">✔ Add right-associative power operator **</h4>
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<pre><code>echo 2 ** 3 ** 2; // 512 (not 64)
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echo -3 ** 2; // -9 (not 9)
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echo 1 - 3 ** 2; // -8
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echo ~3 ** 2; // -10 (not 16)</code></pre>
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</section>
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<section id="php56opoverload">
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<h4 class="p">✔ Internal operator overloading for internal features like GMP</h4>
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<pre><code>echo 2**512;
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echo "\n";
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$n = gmp_init(2);
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echo $n**512;</code></pre>
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<pre><code>1.3407807929943E+154
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13407807929942597099574024998205846127479365820592393377723561443721764030073546976801874298166903427690031858186486050853753882811946569946433649006084096
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</code></pre> </section>
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<section id="php56use">
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<h4 class="p">✔ use function and use const namespace imports</h4>
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<pre><code>include 'template.inc';
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include 'db.inc';
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use function template\header, template\footer, db\query;
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header('My Page');
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query('select * from stuff');
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footer();</code></pre>
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</section>
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<section id="php56_0">
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<h4 class="p">✔ default_charset ini now applies to internal funcs</h4>
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<h4 class="p">✔ SSL Peer verification by default</h4>
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<h4 class="p">✔ openssl certificate fingerprints</h4>
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<h4 class="p">✔ SAN x509 ext matching when verifying host names</h4>
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<h4 class="p">✔ automatic DoS prevention of TLS renegotiation attacks</h4>
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<h4 class="p">✔ and many more openssl-related options</h4>
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</section>
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<section id="php56_1">
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<h4 class="p">✔ Asynchronous PostgreSQL database connections</h4>
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<h4 class="p">✔ Non-blocking PostgreSQL queries</h4>
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<h4 class="p">✔ New phpdbg SAPI</h4>
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<h4 class="p">✔ Support for > 2GB file uploads</h4>
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<h4 class="p">✔ The php://input stream is now re-usable</h4>
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<h4 class="p">✔ Added hash_equals() for timing attack safe string comparison</h4>
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<h4 class="p">✔ Added gost-crypto (CryptoPro S-box) hash algorithm</h4>
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<h4 class="p">✔ FPM workers can now change their apparmor profile</h4>
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<h4 class="p">✔ OCI8 Improvements</h4>
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</section>
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<section id="php56_done">
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<div align="" style="font-size: ; color: ; margin-left: ; margin-right: ; margin-top: ; margin-bottom: ;"><a href="http://php.net/migration56" target="">php.net/migration56</a></div><br />
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</section> </section>
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<section>
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<h2 margin-bottom="2em">Deploying Web Apps</h2><br>
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<h3 class="p">Are your deploys atomic?</h3>
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<h3 class="p">Are you sure?</h3>
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<h4 class="p">What happens to a request that is currently executing when you deploy?</h4>
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</section>
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<section>
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<h2 margin-bottom="2em">Deploying Web Apps</h2><br>
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<img src="/presentations/slides/intro/dep1.png" width="642" height="300">
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</section>
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<section>
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<h2 margin-bottom="2em">Deploying Web Apps</h2><br>
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<h4 class="p">✔ Don't copy files into current document root</h4>
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<h4 class="p">✔ Let existing requests finish on old code</h4>
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<h4 class="p">✔ New requests start on new code</h4>
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<h4 class="p">✔ Avoid clearing your opcode cache</h4>
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<h4 class="p">✔ Minimal impact on production traffic</h4>
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</section>
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<section>
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<h2 margin-bottom="2em">Deploying Web Apps</h2><br>
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<img src="/presentations/slides/intro/dep2.png" width="680" height="428">
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</section>
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<section>
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<h2 margin-bottom="2em">Deploying Web Apps</h2><br>
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<img src="/presentations/slides/intro/dep3.png" width="680" height="428">
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</section>
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<section>
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<h2 margin-bottom="2em">Deploying Web Apps</h2><br>
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<h4 class="p">2 Document Root directories</h4>
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<h4 class="p">Symlink /var/www/site toggles between them</h4>
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<h4 class="p">realpath() symlink at the web server level</h4>
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<h4 class="p">Set Document Root to symlink realpath</h4>
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<h4 class="p">Never hardcode the document root in code</h4>
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</section>
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<section>
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<h2 margin-bottom="2em">Deploying Web Apps</h2><br>
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<h3 class="p">Apache</h3>
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<h4 class="p">http://github.com/etsy/mod_realdoc</h4>
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<h3 class="p">nginx</h3>
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<h4 class="p">You can use $realpath_root</h4>
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<p class="p">eg. fastcgi_param DOCUMENT_ROOT $realpath_root;</p>
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<h3 class="p">PHP</h3>
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<h4 class="p">http://github.com/etsy/incpath</h4>
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</section>
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<section>
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<div align="" style="font-size: ; color: ; margin-left: ; margin-right: ; margin-top: ; margin-bottom: ;"><a href="http://codeascraft.com/2013/07/01/atomic-deploys-at-etsy/" target="">codeascraft.com/2013/07/01/atomic-deploys-at-etsy/</a></div><br />
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</section>
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<section>
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<img src="/presentations/slides/intro/lovehack-white-1000.png" width="1001" height="421">
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</section>
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<section data-background="#000000">
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<img src="/presentations/slides/intro/rasmus.jpg" width="523" height="700">
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</section>
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<section data-background="#000000">
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<img src="/presentations/slides/intro/Greenland1.jpg" width="1024" height="685">
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</section>
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<section data-background="#000000">
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<img src="/presentations/slides/intro/Greenland2.jpg" width="1024" height="685">
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</section>
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<section data-background="#000000">
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<img src="/presentations/slides/intro/Greenland3.jpg" width="1024" height="685">
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</section>
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<section>
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<h2>Work on things that matter (to you)</h2>
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</section>
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<section>
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<h4 class="p">We are running out of things that can be solved in isolation with our keyboards</h4>
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</section>
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<section>
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<img src="/presentations/slides/intro/barros1.png" width="480" height="320">
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<img src="/presentations/slides/intro/barros2.jpg" width="250" height="196">
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<img src="/presentations/slides/intro/barros3.jpg" width="250" height="367">
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<img src="/presentations/slides/intro/sasa.jpg" width="600" height="400">
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</section>
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