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2019-03 PHP without PHP Architecture @ Confoo

The document discusses the philosophy and architecture of PHP, emphasizing its pragmatic and scalable capabilities compared to other programming languages. It highlights the importance of understanding the environment in which software operates, and draws analogies from architecture and construction principles. Additionally, it touches on advanced caching techniques and the interplay between code and design, underscoring the need for harmonious integration of technology and user experience.

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PHP without PHP The Philosophy of Good Architecture terry chay 2018-03-15T11:00+0500 Confoo, Montreal, Canada http://bit.ly/confoo19-architecture Expecting "Where Have All My Servers Gone?" Sorry, Last minute change, too late to make the program. (I guess the speaker found his servers.)
Funky Caching Prologue #1
aka ErrorDocument trick Smarter Caching … Rasmus’s Trick (Stig’s trick) Go into apache.conf (or .htaccess) and ErrorDocument 404 /error.php
$filepath = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH); //or $_SERVER['REDIRECT_URL'] $basepath = dirname(__FILE__).DIR_SEP;   // Test to see if you can work with it if (false) { //…EDIT…     //output a 404 page     include('404.html'); // see http://www.alistapart.com/articles/perfect404/ for tips     return; }   // Generate the file // …EDIT… $data = 'something';   // Don't send 404 back, send 200 OK because this is a pretty smart 404 // not a clueless one! http://www.urbandictionary.com/define.php?term=404 header(sprintf('%s 200', $_SERVER['SERVER_PROTOCOL'])); //Show the file echo $data;   //Store the page to bypass PHP on the next request. Use a temp file with a // link trick in order to avoid race conditions between concurrent PHP // processes. $tmpfile = tempnam($basepath.'tmp','fc'); $fp = fopen($tmpfile,'w'); //remove the "_" this is crashing my blog syntax hilighter fputs($fp, $data); fclose($fp); @link($basepath.$filepath, $tmpfile); //suppress errors due to losing race unlink($tmpfile); Error.PHP
$filepath = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH); //or $_SERVER['REDIRECT_URL'] $basepath = dirname(__FILE__).DIR_SEP;   // Test to see if you can work with it if (false) { //…EDIT…     //output a 404 page     include('404.html'); // see http://www.alistapart.com/articles/perfect404/ for tips     return; }   // Generate the file // …EDIT… $data = 'something';   // Don't send 404 back, send 200 OK because this is a pretty smart 404 // not a clueless one! http://www.urbandictionary.com/define.php?term=404 header(sprintf('%s 200', $_SERVER['SERVER_PROTOCOL'])); //Show the file echo $data;   //Store the page to bypass PHP on the next request. Use a temp file with a // link trick in order to avoid race conditions between concurrent PHP // processes. $tmpfile = tempnam($basepath.'tmp','fc'); $fp = fopen($tmpfile,'w'); //remove the "_" this is crashing my blog syntax hilighter fputs($fp, $data); fclose($fp); @link($basepath.$filepath, $tmpfile); //suppress errors due to losing race unlink($tmpfile); Error.PHP
$filepath = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH); //or $_SERVER['REDIRECT_URL'] $basepath = dirname(__FILE__).DIR_SEP;   // Test to see if you can work with it if (false) { //…EDIT…     //output a 404 page     include('404.html'); // see http://www.alistapart.com/articles/perfect404/ for tips     return; }   // Generate the file // …EDIT… $data = 'something';   // Don't send 404 back, send 200 OK because this is a pretty smart 404 // not a clueless one! http://www.urbandictionary.com/define.php?term=404 header(sprintf('%s 200', $_SERVER['SERVER_PROTOCOL'])); //Show the file echo $data;   //Store the page to bypass PHP on the next request. Use a temp file with a // link trick in order to avoid race conditions between concurrent PHP // processes. $tmpfile = tempnam($basepath.'tmp','fc'); $fp = fopen($tmpfile,'w'); //remove the "_" this is crashing my blog syntax hilighter fputs($fp, $data); fclose($fp); @link($basepath.$filepath, $tmpfile); //suppress errors due to losing race unlink($tmpfile); Error.PHP
PHP without PHP
Paradigms Prologue #2
Code Complete The metaphor of Code as construction comes from this book… W e n o w k n o w t h i s i s fundamentally wrong…
Mythical Man Month “man-month” is a term from construction work The premise is that man and months are interchangeable. This means that in order to reach a deadline I simply add more people to the project.
F i r s t c o n s i d e r s o m e t h i n g l i k e painting a fence: everything is partionable (man-month). …add a constant time for training. …add communication cost: n(n-1)/2. Compare to the unpartitionable (single man) Adding people to a late project makes it later! paritionable with training traning + communication unpartitionable
Engineer and Architect
1 Fallingwater organic, democratic, plasticity, continuity
…including me
Hatchway Staircase View at the main (living room) level, from the bridge (from east)
Beyond the glass Fallingwater: Living room terraces and glass walls (from east).
Fall Foliage View from lookout, downstream.
Fall Foliage View from lookout, downstream.
No barriers Detail: corner window at the guest house, from southeast.
Existing tree The trellis over the driveway is built to accommodate a tree.
Local quarry Living room, west (downstream) side, from southeast
Existing boulder Living room fireplace and hearth, looking from kitchen door to south windows
Philosophy organic, democratic, plasticity, continuity.
Why on PHP?
Harmony with Environment Apache web server: ErrorDocument Customer-centric: Performance paramount Relational Database: Slow persistence Harmony with PHP itself…
Architecture of PHP Modern web architecture
PHP is “Cheap” “A project done in Java will cost 5 times as much, take twice as long, and be harder to maintain than a project done in a scripting language such as PHP or Perl.” —Phillip Greenspun
PHP is “Scalable” “That a Java servlet performs better than a PHP script, under optimal conditions [has] nothing to do with scalability. The point is can your application continue to deliver consistent performance as volume increases. PHP delegates all the ‘hard stuff’ to other systems.” —Harry Fuecks
PHP is “Pragmatic” “PHP is not about purity in CS principles or architecture; it is about solving the ugly web problem with an admittedly ugly, but extremely functional and convenient solution. If you are looking for purity, you are in the wrong boat. Get out now before you get hit by a wet cat!” —Rasmus Lerdorf
Not PHP? A framework? Your language is a set of different choices. Some choices were made for you (by a framework). Choices create a different environment. Leverage those choices to be in harmony with that environment!
2 Bellefield Towers Design Hubris
Starting where my mom worked…
Gothic Romanesque architecture The current Bellefield Church (two blocks away)
Other city towers Allegheny Courthouse Main Tower & Four Tower Types at Jail (and other towers)
Tower of Learning Within spitting distance of Bellefield Towers
Carnegie Library Most iconic moment in baseball history
Why is Bellefield Towers so Ugly?
Design Hubris? “I'm a developer, I can make software conform to my needs.” Trying to “lord over the environment with an isolated man-made imposition.” “But what I mean is it’s all man-made in software, there is no environment.” Language, infrastructure, team, etc. it's all the environment
…at Tagged: the literal environment add slideshow
…at Tagged Cubes 2007: 20M users, 20M pages/ day crashing 2009: 80M users, 250M pages/ day, 3rd largest 40% one app
Friendster & Design Hubris
Good Architecture Considers Environment Bad Architecture Doesn't
3 Golden Gate Bridge The Design Pattern
design build quote of goldne gate bridge
the other bridge quote from emperor norton
quotes of sf
Same problem, different pattern Original design was hybrid cantilever-suspension. Replaced by pure suspension
Art Deco Bridge Tower, Lighting, pedestrial walkway quote of art deco movemebnt
International Orange Rust colored like the environment it lives in … and safe.
Part of the whole
Design Patterns Defined “Each pattern describes a problem which occurs over a n d o v e r a g a i n i n o u r e n v i r o n m e n t , a n d t h e n describes the core of the solution to that problem, in such a way that you can use this solution a million times over, without ever doing it the same way twice.” shorten quote
Certainly iconic Me in front of both icons
Never the same way twice How do you know which one? How do you know which way? blend transition in stages
Funky Caching again “search for the closest matching valid URL and redirect, and use attempted url text as a DB keyword lookup” —Rasmus Lerdorf
cleanup text
Javascript and CSS compiling & caching put a graphic or some text
<?php $watermark = '3129080702_c4e76f71d7_o.png'; $dead_url = 'http://example.com/dead_image.png';   // {{{ start_image($filename, &$data) /** * Creates a gd handle for a valid file * @param $filename string the file to get * @param $data array the imagesize * @return resource GD handle */ function start_image($filename, &$data) {     $data = @getimagesize($filename);     if (empty($data)) { return null; }     $data['ratio'] = $data[0]/$data[1];     switch($data[2]) {         case IMG_GIF: return imagecreatefromgif($filename);         case 3: //problem where IMG_PNG is not bound correctly for my install         case IMG_PNG: return imagecreatefrompng($filename);         case IMG_JPG: return imagecreatefromjpeg($filename);         case IMG_WBMP: return imagecreatefromwbmp($filename);         case IMG_XPM: return imagecreatefromxbm($filename);     }     return null; }    // }}} $requestimg = $_SERVER['REDIRECT_URL']; if (!$_SERVER['QUERY_STRING']) {     // redirect user to invalid image     tag_http::redirect($dead_url);     return ''; } // grab image to temp {{{ $ch = curl_init($_SERVER['QUERY_STRING']); $tempfile = tempnam('/tmp', 'prod_remote_'); $fp = f_open($tempfile, 'w'); //again delete the "_" curl_setopt($ch, CURLOPT_FILE, $fp); curl_setopt($ch, CURLOPT_HEADER, 0); curl_exec_($ch); //delete the final "_" curl_close($ch); fclose($fp); // }}} expand callouts
<?php $watermark = '3129080702_c4e76f71d7_o.png'; $dead_url = 'http://example.com/dead_image.png';   // {{{ start_image($filename, &$data) /** * Creates a gd handle for a valid file * @param $filename string the file to get * @param $data array the imagesize * @return resource GD handle */ function start_image($filename, &$data) {     $data = @getimagesize($filename);     if (empty($data)) { return null; }     $data['ratio'] = $data[0]/$data[1];     switch($data[2]) {         case IMG_GIF: return imagecreatefromgif($filename);         case 3: //problem where IMG_PNG is not bound correctly for my install         case IMG_PNG: return imagecreatefrompng($filename);         case IMG_JPG: return imagecreatefromjpeg($filename);         case IMG_WBMP: return imagecreatefromwbmp($filename);         case IMG_XPM: return imagecreatefromxbm($filename);     }     return null; }    // }}} $requestimg = $_SERVER['REDIRECT_URL']; if (!$_SERVER['QUERY_STRING']) {     // redirect user to invalid image     tag_http::redirect($dead_url);     return ''; } // grab image to temp {{{ $ch = curl_init($_SERVER['QUERY_STRING']); $tempfile = tempnam('/tmp', 'prod_remote_'); $fp = f_open($tempfile, 'w'); //again delete the "_" curl_setopt($ch, CURLOPT_FILE, $fp); curl_setopt($ch, CURLOPT_HEADER, 0); curl_exec_($ch); //delete the final "_" curl_close($ch); fclose($fp); // }}}
<?php $watermark = '3129080702_c4e76f71d7_o.png'; $dead_url = 'http://example.com/dead_image.png';   // {{{ start_image($filename, &$data) /** * Creates a gd handle for a valid file * @param $filename string the file to get * @param $data array the imagesize * @return resource GD handle */ function start_image($filename, &$data) {     $data = @getimagesize($filename);     if (empty($data)) { return null; }     $data['ratio'] = $data[0]/$data[1];     switch($data[2]) {         case IMG_GIF: return imagecreatefromgif($filename);         case 3: //problem where IMG_PNG is not bound correctly for my install         case IMG_PNG: return imagecreatefrompng($filename);         case IMG_JPG: return imagecreatefromjpeg($filename);         case IMG_WBMP: return imagecreatefromwbmp($filename);         case IMG_XPM: return imagecreatefromxbm($filename);     }     return null; }    // }}} $requestimg = $_SERVER['REDIRECT_URL']; if (!$_SERVER['QUERY_STRING']) {     // redirect user to invalid image     tag_http::redirect($dead_url);     return ''; } // grab image to temp {{{ $ch = curl_init($_SERVER['QUERY_STRING']); $tempfile = tempnam('/tmp', 'prod_remote_'); $fp = f_open($tempfile, 'w'); //again delete the "_" curl_setopt($ch, CURLOPT_FILE, $fp); curl_setopt($ch, CURLOPT_HEADER, 0); curl_exec_($ch); //delete the final "_" curl_close($ch); fclose($fp); // }}}
<?php $watermark = '3129080702_c4e76f71d7_o.png'; $dead_url = 'http://example.com/dead_image.png';   // {{{ start_image($filename, &$data) /** * Creates a gd handle for a valid file * @param $filename string the file to get * @param $data array the imagesize * @return resource GD handle */ function start_image($filename, &$data) {     $data = @getimagesize($filename);     if (empty($data)) { return null; }     $data['ratio'] = $data[0]/$data[1];     switch($data[2]) {         case IMG_GIF: return imagecreatefromgif($filename);         case 3: //problem where IMG_PNG is not bound correctly for my install         case IMG_PNG: return imagecreatefrompng($filename);         case IMG_JPG: return imagecreatefromjpeg($filename);         case IMG_WBMP: return imagecreatefromwbmp($filename);         case IMG_XPM: return imagecreatefromxbm($filename);     }     return null; }    // }}} $requestimg = $_SERVER['REDIRECT_URL']; if (!$_SERVER['QUERY_STRING']) {     // redirect user to invalid image     tag_http::redirect($dead_url);     return ''; } // grab image to temp {{{ $ch = curl_init($_SERVER['QUERY_STRING']); $tempfile = tempnam('/tmp', 'prod_remote_'); $fp = f_open($tempfile, 'w'); //again delete the "_" curl_setopt($ch, CURLOPT_FILE, $fp); curl_setopt($ch, CURLOPT_HEADER, 0); curl_exec_($ch); //delete the final "_" curl_close($ch); fclose($fp); // }}}
// configure image and dimensions {{{ $size_data = array(); $im = start_image($tempfile, $size_data); if (!$im) {     unlink($tempfile);     tag_http::redirect($dead_url);     return; } // }}} // get watermark information {{{ $wm_data = array(); $wm = start_image($watermark, $wm_data); if (!$wm) {     unlink ($tempfile);     tag_http::redirect($dead_url);     return; } // }}} // add watermark {{{ if ($size_data['ratio']> $wm_data['ratio']) {     // image is wider format than the watermark     $new_smaller_dim = $wm_data[0] * ($size_data[1]/$wm_data[1]);     $dst_x = ($size_data[0] - $new_smaller_dim)/2;     $dst_y = 0;     $dst_w = $new_smaller_dim;     $dst_h = $size_data[1]; } else {     // image is taller format than the watermark     $new_smaller_dim = $wm_data[1] * ($size_data[0]/$wm_data[0]);     $dst_x = 0;     $dst_y = ($size_data[1] - $new_smaller_dim)/2;     $dst_w = $size_data[0];     $dst_h = $new_smaller_dim;; } imagecopyresized($im, $wm, $dst_x, $dst_y, 0, 0, $dst_w, $dst_h, $wm_data[0], $wm_data[1]); header(sprintf('%s 200', $_SERVER['SERVER_PROTOCOL'])); header(sprintf('Content-type: %s',$size_data['mime'])); // }}} switch ($size_data[2]) {     case IMG_GIF: imagegif($im); break;     case 3: case IMG_PNG: imagepng($im); break;     case IMG_JPG: imagejpeg($im); break;     case IMG_WBMP: imagewbmp($im); break;     case IMG_XPM: imagexbm($im); break; } imagedestroy($wm); imagedestroy($im); unlink($tempfile);
// configure image and dimensions {{{ $size_data = array(); $im = start_image($tempfile, $size_data); if (!$im) {     unlink($tempfile);     tag_http::redirect($dead_url);     return; } // }}} // get watermark information {{{ $wm_data = array(); $wm = start_image($watermark, $wm_data); if (!$wm) {     unlink ($tempfile);     tag_http::redirect($dead_url);     return; } // }}} // add watermark {{{ if ($size_data['ratio']> $wm_data['ratio']) {     // image is wider format than the watermark     $new_smaller_dim = $wm_data[0] * ($size_data[1]/$wm_data[1]);     $dst_x = ($size_data[0] - $new_smaller_dim)/2;     $dst_y = 0;     $dst_w = $new_smaller_dim;     $dst_h = $size_data[1]; } else {     // image is taller format than the watermark     $new_smaller_dim = $wm_data[1] * ($size_data[0]/$wm_data[0]);     $dst_x = 0;     $dst_y = ($size_data[1] - $new_smaller_dim)/2;     $dst_w = $size_data[0];     $dst_h = $new_smaller_dim;; } imagecopyresized($im, $wm, $dst_x, $dst_y, 0, 0, $dst_w, $dst_h, $wm_data[0], $wm_data[1]); header(sprintf('%s 200', $_SERVER['SERVER_PROTOCOL'])); header(sprintf('Content-type: %s',$size_data['mime'])); // }}} switch ($size_data[2]) {     case IMG_GIF: imagegif($im); break;     case 3: case IMG_PNG: imagepng($im); break;     case IMG_JPG: imagejpeg($im); break;     case IMG_WBMP: imagewbmp($im); break;     case IMG_XPM: imagexbm($im); break; } imagedestroy($wm); imagedestroy($im); unlink($tempfile);
// configure image and dimensions {{{ $size_data = array(); $im = start_image($tempfile, $size_data); if (!$im) {     unlink($tempfile);     tag_http::redirect($dead_url);     return; } // }}} // get watermark information {{{ $wm_data = array(); $wm = start_image($watermark, $wm_data); if (!$wm) {     unlink ($tempfile);     tag_http::redirect($dead_url);     return; } // }}} // add watermark {{{ if ($size_data['ratio']> $wm_data['ratio']) {     // image is wider format than the watermark     $new_smaller_dim = $wm_data[0] * ($size_data[1]/$wm_data[1]);     $dst_x = ($size_data[0] - $new_smaller_dim)/2;     $dst_y = 0;     $dst_w = $new_smaller_dim;     $dst_h = $size_data[1]; } else {     // image is taller format than the watermark     $new_smaller_dim = $wm_data[1] * ($size_data[0]/$wm_data[0]);     $dst_x = 0;     $dst_y = ($size_data[1] - $new_smaller_dim)/2;     $dst_w = $size_data[0];     $dst_h = $new_smaller_dim;; } imagecopyresized($im, $wm, $dst_x, $dst_y, 0, 0, $dst_w, $dst_h, $wm_data[0], $wm_data[1]); header(sprintf('%s 200', $_SERVER['SERVER_PROTOCOL'])); header(sprintf('Content-type: %s',$size_data['mime'])); // }}} switch ($size_data[2]) {     case IMG_GIF: imagegif($im); break;     case 3: case IMG_PNG: imagepng($im); break;     case IMG_JPG: imagejpeg($im); break;     case IMG_WBMP: imagewbmp($im); break;     case IMG_XPM: imagexbm($im); break; } imagedestroy($wm); imagedestroy($im); unlink($tempfile);
San Francisco Looking around you for inspiration (Organic, Democratic, Plasticity, Continuity)
Organic “Form and function are one” think beyond funky-caching! Funky-caching is just a sleight-of- hand …actually a design pattern you've seen before and used many times.
Cache-Aside Pattern
Cache-Aside Pattern
Cache-Aside Pattern Web server PHP
Cache-Aside Pattern Instead of dynamic page generation maybe it's a database query or remote web query Instead cache in file system, the cache could be Memcache or Redis instead of bypassing app server, bypass your entire website (reverse proxy or Content Distribution Network) Whether to use it an how is ALWAYS determined by environment ORGANIC: Form and function are one
San Francisco Looking around you for inspiration (Organic, Democratic, Plasticity, Continuity)
Democratic “design should accommodate needs.” Me "Ruby on Rails is a rounded rectangle.” “PHP is a Ball of Nails.” let me build a bridge to the ruby world…
mod_ruby and AWS mod_ruby shares app space Ruby on Rails could not be used in a shared environment, PHP could 2006: Amazon adds EC2 to AWS Ruby world adopted it in droves because of a NEED.
Ruby gave us modern devops Puppet/Chef GitHub Heroku/Engineyard vagrant
Ruby was Democratic Ruby and cloud computing was design accommodating need Democratic: Design should accommodate need In the PHP world we adopt those tools (php is scalable by being "shared none") (other worlds like Python and Go, adopt and extend to give us things like Ansible and docker)
San Francisco Looking around you for inspiration (Organic, Democratic, Plasticity, Continuity)
Plasticity “physical element should remove barriers.” JavaScript started as a marketing portmanteau Hypertext & Hypercard onmouseover
JavaScript hits big time Code richer libaries: JQuery, Underscores, BackboneJS… barrier to install: npm Compiling those libraries into single file: webpack webpack means we have transpiler: Coffeescript, TypeScript,… Facebook's php mentality: "Practical": webpack: ES5 (webpack) into javascript, performance
NPM, Webpack & Plasticity Facebook's PHP mentality: "Practical": ReactJS javascript framework focus on performance (vdom) we have webpack, why not write it in ECMAScript6 and transpile it to browser code? PHP's PHP mentality: "Cheap" “npm is great, let's copy it! (including its package manafest)” -> composer All things that remove barriers: Plasticity
San Francisco Looking around you for inspiration (Organic, Democratic, Plasticity, Continuity)
Continuity “An element should be part of nature.” threw Ruby a bone, what about Rounded rectangles? Meet Bill atkinson folklore.org
San Francisco Looking around you for inspiration (Organic, Democratic, Plasticity, Continuity)
Thanks! tychay@php.net @tychay terrychay.com (say we met at #confoo) http://bit.ly/confoo19-architecture

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