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Bringing Old Legacy Apps To October 19th, 2016 Sammy Kaye Powers @SammyK PHP 7 & Beyond

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Codebase @SammyK #zendcon2016 joind.in/talk/6d127

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I’ll just rewrite this in ____________! @SammyK #zendcon2016 joind.in/talk/6d127

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I’ll just rewrite this in ____________! @SammyK #zendcon2016 joind.in/talk/6d127

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I’ll just rewrite this in ____________! Laravel @SammyK #zendcon2016 joind.in/talk/6d127

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I’ll just rewrite this in ____________! @SammyK #zendcon2016 joind.in/talk/6d127

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rewrite from scratch? Why not @SammyK #zendcon2016 joind.in/talk/6d127

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Functionality Existing Codebase Fancy-pants rewrite

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Functionality Existing Codebase Fancy-pants rewrite

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Functionality Existing Codebase Fancy-pants rewrite

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Functionality Existing Codebase Fancy-pants rewrite

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Functionality Existing Codebase Fancy-pants rewrite

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Refactoring Martin Fowler http://martinfowler.com/books/refactoring.html

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“Legacy” /leɡəsē/ • Requires an EOL version of PHP • No automated tests • Has outdated dependencies • No autoloading • No sign of “single responsibility”

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“Legacy” We’ll assume …means any code that can be improved @SammyK #zendcon2016 joind.in/talk/6d127 (at least for this talk)

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Expectations @SammyK #zendcon2016 joind.in/talk/6d127

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elePHPant How to eat an

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ZERO Step @SammyK #zendcon2016 joind.in/talk/6d127

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Around Poke @SammyK #zendcon2016 joind.in/talk/6d127

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Around Poke • Composer &/or autoloading? • Documentation? (Look for hidden docs!) • Framework/Dependencies? (How out-dated?) • How is database layer implemented? • How is config handled? • How are front-end assets handled? • Are there tests? • Production env (PHP version)

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Analysis Static @SammyK #zendcon2016 joind.in/talk/6d127

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phploc

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phploc

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phpcpd

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Consider the Stakeholders @SammyK #zendcon2016 joind.in/talk/6d127

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Consider the Stakeholders I’ll need 80 hours to refactor the user auth & ACL @SammyK #zendcon2016 joind.in/talk/6d127

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Consider the Stakeholders • Most critical security holes • Most critical bugs • Most critical features • Use data from static analysis Make a plan

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ONE Step @SammyK #zendcon2016 joind.in/talk/6d127

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Environment Get it running on your local @SammyK #zendcon2016 joind.in/talk/6d127

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From Docker to production Chris Tankersley @SammyK #zendcon2016 joind.in/talk/6d127 Today @ 5:15PM in Artist 3

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Git Get with master original local-config

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5.(wat) @SammyK #zendcon2016 joind.in/talk/6d127

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Fix all the errors @SammyK #zendcon2016 joind.in/talk/6d127

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TWO Step @SammyK #zendcon2016 joind.in/talk/6d127

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7.0 @SammyK #zendcon2016 joind.in/talk/6d127

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7.0 ✓Performance increase PHP 7 features ✓

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7.0

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BC is totes amaze

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PHP 7.0 enlightenment The path to 7.0 5.6

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PHP 7.0 enlightenment The path to 7.0 5.5

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PHP 7.0 enlightenment The path to 7.0 5.4

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PHP 7.0 enlightenment The path to 7.0 >= 5.3

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THREE Step @SammyK #zendcon2016 joind.in/talk/6d127

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Fix all the PHP 7 errors @SammyK #zendcon2016 joind.in/talk/6d127

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PHP 7.0 Quick tricks to refactor to (in order of ease) @SammyK #zendcon2016 joind.in/talk/6d127

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PHP 7.0 “Gotchas” ASP and script PHP tags removed <% %> <%= %>

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PHP 7.0 “Gotchas” removed php://input $HTTP_RAW_POST_DATA instead read from $HTTP_RAW_POST_DATA = file_get_contents('php://input');

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PHP 7.0 “Gotchas” PHP-4-style constructors deprecated class foo { function foo() {} }

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PHP 7.0 “Gotchas” PHP-4-style constructors deprecated class foo { function __construct() {} }

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PHP 7.0 “Gotchas” Some functions got the ax ereg* functions

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PHP 7.0 “Gotchas” “There’s a shim for that!”

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PHP 7.0 “Gotchas” “There’s a shim for that!” ereg* functions bbrala/php7-ereg-shim eregi($pattern, $sub, &$match) preg_match('/'.$pattern.'/i', $sub, $match)

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PHP 7.0 “Gotchas” Another one bites the dust ext/mysql functions

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PHP 7.0 “Gotchas” “There’s a shim for that!” ext/mysql functions dshafik/php7-mysql-shim

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PHP 7.0 “Gotchas” Caveats though… ext/mysql functions dshafik/php7-mysql-shim $con = mysql_connect(…); $connected = is_resource($con);

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PHP 7.0 “Gotchas” Another bird with the PHP 7.0 stone ext/mssql functions instead use sqlsrv_*(), odbc_*(), PDO

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PHP 7.0 “Gotchas” A few others for the chopping block Some ext/mcrypt functions, et. al.

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PHP 7.0 “Gotchas” Scalar Type Declarations New reserved keywords: string, int, bool, float

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PHP 7.0 “Gotchas” Uniform Variable Syntax Change in evaluating indirect expressions @SammyK #zendcon2016 joind.in/talk/6d127

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PHP 7.0 “Gotchas” Uniform Variable Syntax $$foo['bar']['baz']

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PHP 7.0 “Gotchas” Uniform Variable Syntax $foo = ['bar' => ['baz' => ‘apple']]; $apple = 'PHP 5.x I see...'; var_dump($$foo['bar']['baz']); string(16) "PHP 5.x I see..." 5.x

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PHP 7.0 “Gotchas” Uniform Variable Syntax Notice: Array to string conversion in / foo.php on line 6 Notice: Undefined variable: Array in / foo.php on line 6 7.x

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PHP 7.0 “Gotchas” Uniform Variable Syntax $$foo['bar']['baz'] 5.x

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PHP 7.0 “Gotchas” Uniform Variable Syntax $$foo['bar']['baz'] 5.x

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PHP 7.0 “Gotchas” Uniform Variable Syntax ${'apple'} 5.x

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PHP 7.0 “Gotchas” Uniform Variable Syntax $apple 5.x string(16) "PHP 5.x I see..."

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PHP 7.0 “Gotchas” Uniform Variable Syntax $$foo['bar']['baz'] 7.x

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PHP 7.0 “Gotchas” Uniform Variable Syntax $$foo['bar']['baz'] 7.x

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PHP 7.0 “Gotchas” Uniform Variable Syntax ${['bar' => ['baz' => ‘apple']} [‘bar’]['baz'] 7.x

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PHP 7.0 “Gotchas” Uniform Variable Syntax ${‘Array’}[‘bar’]['baz'] 7.x

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PHP 7.0 “Gotchas” Uniform Variable Syntax $$foo['bar']['baz'] 7.x

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PHP 7.0 “Gotchas” Uniform Variable Syntax ${$foo[‘bar’]['baz']} 7.x

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PHP 7.0 “Gotchas” $$foo['bar']['baz'] ${$foo['bar']['baz']} ($$foo)['bar']['baz'] 5.x 7.x Uniform Variable Syntax

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FOUR Step @SammyK #zendcon2016 joind.in/talk/6d127

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Code! @SammyK #zendcon2016 joind.in/talk/6d127

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Tests TESTS Tests @SammyK #zendcon2016 joind.in/talk/6d127

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PHPUnit? @SammyK #zendcon2016 joind.in/talk/6d127

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Acceptance Tests @SammyK #zendcon2016 joind.in/talk/6d127

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Codeception @SammyK #zendcon2016 joind.in/talk/6d127

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Behavior-driven testing framework @SammyK #zendcon2016 joind.in/talk/6d127

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Composer + Autoloading @SammyK #zendcon2016 joind.in/talk/6d127

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@SammyK #zendcon2016 joind.in/talk/6d127

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Feature (User Story)

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Scenario

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@SammyK #zendcon2016 joind.in/talk/6d127

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Scenario @SammyK #zendcon2016 joind.in/talk/6d127

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FIVE Step “The Refactoring Loop” @SammyK #zendcon2016 joind.in/talk/6d127

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refactorLoop: @SammyK #zendcon2016 joind.in/talk/6d127

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Start small @SammyK #zendcon2016 joind.in/talk/6d127

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Make sure there’s a test @SammyK #zendcon2016 joind.in/talk/6d127

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@SammyK #zendcon2016 joind.in/talk/6d127 Refactor

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Run your tests @SammyK #zendcon2016 joind.in/talk/6d127

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goto refactorLoop; @SammyK #zendcon2016 joind.in/talk/6d127

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lets you refactor like a BEAST @SammyK #zendcon2016 joind.in/talk/6d127

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PHPUnit Don’t forget about

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PHP 7.0 Features @SammyK #zendcon2016 joind.in/talk/6d127

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random_int() random_bytes() PHP 7.0 Features CSPRNG!! @SammyK #zendcon2016 joind.in/talk/6d127

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JOURNEY MY CENTER TO THE OF #ShamelessPlug Tomorrow @ 11:30am in Festival 2

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PHP 7.0 Features Scalar Type Declarations @SammyK #zendcon2016 joind.in/talk/6d127

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PHP 7.0 Features Scalar Type Declarations function foo(string $name,
 int $age,
 bool $isGreat,
 float $income)
 { /* */ }

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PHP 7.0 Features Scalar Type Declarations function foo(string $name,
 int $age,
 bool $isGreat,
 float $income)
 { /* */ }

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99.99999999999942 I got problems but float $income NEVER USE FLOATS FOR MONEY!

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PHP 7.0 Features Return type declarations @SammyK #zendcon2016 joind.in/talk/6d127

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PHP 7.0 Features Return type declarations /**
 * @return Collection
 */
 public function foo()
 {
 }

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PHP 7.0 Features /**
 * @return Collection
 */
 public function foo()
 {
 } Return type declarations

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PHP 7.0 Features public function foo(): Collection
 {
 } Return type declarations

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PHP 7.0 Features Null coalesce operator @SammyK #zendcon2016 joind.in/talk/6d127

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PHP 7.0 Features $bar = isset($_GET[‘foo’]) ? $_GET[‘foo’] : null; Null coalesce operator $bar = $_GET[‘foo’] ?? null;

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PHP 7.0 Features Insane speed improvements @SammyK #zendcon2016 joind.in/talk/6d127

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And beyond? @SammyK #zendcon2016 joind.in/talk/6d127

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PHP 7.1 Considering RC3 @SammyK #zendcon2016 joind.in/talk/6d127

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PHP 7.1 considerations deprecated ext/mcrypt Soon to be...

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Void return types PHP 7.1 considerations @SammyK #zendcon2016 joind.in/talk/6d127

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public function foo(): void
 {
 } Void return types PHP 7.1 considerations

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Nullable types PHP 7.1 considerations @SammyK #zendcon2016 joind.in/talk/6d127 (kinda like union types for null)

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Nullable types function foo(string $name)
 { /* */ } PHP 7.1 considerations

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Nullable types function foo(?string $name)
 { /* */ } PHP 7.1 considerations

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Nullable types function foo(string $name = null)
 { /* */ } foo(); PHP 7.1 considerations

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Nullable types foo(); function foo(?string $name)
 { /* */ } foo(null); PHP 7.1 considerations

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Nullable types function foo(): ?string { return null; } PHP 7.1 considerations

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Class constant visibility PHP 7.1 considerations @SammyK #zendcon2016 joind.in/talk/6d127

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Class constant visibility class Foo {
 public const FOO = 0; protected const BAR = 1; private const BAZ = 2; } PHP 7.1 considerations

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`iterable` pseudo-type PHP 7.1 considerations @SammyK #zendcon2016 joind.in/talk/6d127

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`iterable` pseudo-type function foo(iterable $a)
 { /* */ } PHP 7.1 considerations $b = []; foo($b); class C implements Iterator {} $b = new C; foo($b);

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`iterable` pseudo-type PHP 7.1 considerations class D implements IteratorAggregate {} foo(new D); Traversable Or instance of

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Some tools I like @SammyK #zendcon2016 joind.in/talk/6d127

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vlucas/phpdotenv .env No peeking! No peeking!

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Some tools I like pimple/pimple @SammyK #zendcon2016 joind.in/talk/6d127

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Some tools I like monolog/monolog @SammyK #zendcon2016 joind.in/talk/6d127

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Some tools I like nikic/fast-route @SammyK #zendcon2016 joind.in/talk/6d127

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Some tools I like illuminate/database @SammyK #zendcon2016 joind.in/talk/6d127

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Some tools I like symfony/console @SammyK #zendcon2016 joind.in/talk/6d127

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Create a PHP application without a framework https://github.com/PatrickLouys/no-framework-tutorial Patrick Louys @SammyK #zendcon2016 joind.in/talk/6d127

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Big-picture Refactoring @SammyK #zendcon2016 joind.in/talk/6d127

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Constant refactoring is the key to managing legacy codebases @SammyK #zendcon2016 joind.in/talk/6d127

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Constant refactoring is the key to managing legacy codebases @SammyK #zendcon2016 joind.in/talk/6d127

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Resources 013: TDD & BDD In PHP Soon: Acceptance Testing with Behat 017: Modernizing Legacy Codebases in PHP November 3rd @ 12:00PM CDT

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Modernizing Legacy Applications in PHP https://leanpub.com/mlaphp Paul M. Jones @SammyK #zendcon2016 joind.in/talk/6d127

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Refactoring Martin Fowler http://martinfowler.com/books/refactoring.html @SammyK #zendcon2016 joind.in/talk/6d127

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Takk! (thanks) @SammyK SammyK.me Host of @PHPRoundtable @ChiPHPUG West Coast Swing Hire me! :) /talk/6d127