php-code-style/README.md

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# Ely.by PHP-CS-Fixer rules
Set of PHP-CS-Fixer rules used in development of Ely.by PHP projects. It's suited for PHP 7.1 and above.
You can use it as a ready-made set of rules or [just some of them](#using-our-fixers).
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[![Latest Version on Packagist][ico-version]][link-packagist]
[![Total Downloads][ico-downloads]][link-downloads]
[![Software License][ico-license]](LICENSE.md)
[![Build Status][ico-build-status]][link-build-status]
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## Installation
First of all install Ely.by PHP-CS-Fixer rules via composer with
[PHP-CS-Fixer](https://github.com/FriendsOfPHP/PHP-CS-Fixer):
```sh
composer require --dev friendsofphp/php-cs-fixer ely/php-code-style
```
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Then create file `.php_cs` with following contents:
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```php
<?php
$finder = \PhpCsFixer\Finder::create()
->in(__DIR__);
return \Ely\CS\Config::create()
->setFinder($finder);
```
And that's it. You can now find code style violations with following command:
```sh
vendor/bin/php-cs-fixer --diff --dry-run -v fix
```
And then completely fix them all with:
```sh
vendor/bin/php-cs-fixer fix
```
### Configuration
You can pass a custom set of rules to the `\Ely\CS\Config::create()` call. For example, it can be used to validate a
project with PHP 7.0 compatibility:
```php
<?php
return \Ely\CS\Config::create([
'visibility_required' => ['property', 'method'],
])->setFinder($finder);
```
## Code style
Our code style is based primarily on [PSR-2](https://www.php-fig.org/psr/psr-2/), while borrowing some ideas from
[PSR-12](https://github.com/php-fig/fig-standards/blob/92b198bb/proposed/extended-coding-style-guide.md)
with some changes.
### Example
This example encompasses some of the rules below as a quick overview:
```php
<?php
declare(strict_types=1);
namespace Vendor\Package;
use Vendor\Package\SomeNamespace\ClassA;
class Foo extends Bar implements FooInterface {
use SomeTrait;
private const SAMPLE_1 = 123;
private const SAMPLE_2 = 321;
public $field1;
public $field2;
public function sampleFunction(int $a, int $b = null): array {
if ($a === $b) {
$result = bar();
} else {
$result = BazClass::bar($this->field1, $this->field2);
}
return $result;
}
public function setToNull(): self {
$this->field1 = null;
return $this;
}
}
```
**Key differences:**
* Opening braces for classes MUST be **on the same line**.
* Opening braces for methods MUST be **on the next line**.
**Additional rules:**
* There MUST be one empty line before `return` statement, except when there is only one statement before it.
```php
<?php
function a() {
$a = '123';
return $a . ' is a number';
}
function b() {
$a = '123';
$b = 'is';
return $a . ' ' . $b . ' a number';
}
```
* There MUST be one blank line around class body, but there MUST be **no blank lines** around anonymous class body.
```php
<?php
class Test {
public function method() {
$obj = new class extends Foo {
public function overriddenMethod() {
// code body
}
};
}
}
```
* Visibility MUST be declared for all methods, properties and constants.
* There MUST be one blank line after an each of `if`, `switch`, `for`, `foreach`, `while` and `do-while` bodies.
```php
<?php
if (true) {
// some actions here
}
echo 'the next statement is here';
```
## Using our fixers
First of all, you must install Ely.by PHP-CS-Fixer package as described in the [installation chapter](#installation).
After that you can enable our custom fixers with `registerCustomFixers` method:
```php
<?php
// Your Finder configuration
return \PhpCsFixer\Config::create()
->registerCustomFixers(new \Ely\CS\Fixers());
```
And then you'll be able to use our custom rules.
### `Ely/blank_line_around_class_body`
Ensure that a class body contains one blank line after its definition and before its end:
```diff
--- Original
+++ New
@@ @@
<?php
class Test {
+
public function func() {
$obj = new class extends Foo {
+
public $prop;
+
}
}
+
}
```
**Configuration:**
* `apply_to_anonymous_classes` - should this fixer be applied to anonymous classes? If it is set to `false`, than
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anonymous classes will be fixed to don't have empty lines around body. **Default**: `true`.
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* `blank_lines_count` - adjusts an amount of the blank lines. **Default**: `1`.
### `Ely/blank_line_before_return`
This is extended version of the original `blank_line_before_statement` fixer. It applies only to `return` statements
and only in cases, when on the current nesting level more than one statements.
```diff
--- Original
+++ New
@@ @@
<?php
public function foo() {
$a = 'this';
$b = 'is';
+
return "$a $b awesome";
}
public function bar() {
$this->foo();
return 'okay';
}
```
### `Ely/line_break_after_statements`
Ensures that there is one blank line above the next statements: `if`, `switch`, `for`, `foreach`, `while`
and `do-while`.
```diff
--- Original
+++ New
@@ @@
<?php
$a = 123;
if ($a === 123) {
// Do something here
}
+
$b = [1, 2, 3];
foreach ($b as $number) {
if ($number === 3) {
echo 'it is three!';
}
}
+
$c = 'next statement';
```
### `Ely/remove_class_name_method_usages` (Yii2)
Replaces Yii2 [`BaseObject::className()`](https://github.com/yiisoft/yii2/blob/e53fc0ded1/framework/base/BaseObject.php#L84)
usages with native `::class` keyword, introduced in PHP 5.5.
```diff
--- Original
+++ New
@@ @@
<?php
use common\models\User;
- $className = User::className();
+ $className = User::class;
```
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[ico-version]: https://img.shields.io/packagist/v/ely/php-code-style.svg?style=flat-square
[ico-license]: https://img.shields.io/badge/license-Apache-green.svg?style=flat-square
[ico-downloads]: https://img.shields.io/packagist/dt/ely/php-code-style.svg?style=flat-square
[ico-build-status]: https://img.shields.io/github/workflow/status/elyby/php-code-style/CI.svg?style=flat-square
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[link-packagist]: https://packagist.org/packages/ely/php-code-style
[link-contributors]: ../../contributors
[link-downloads]: https://packagist.org/packages/ely/php-code-style/stats
[link-build-status]: https://github.com/elyby/php-code-style/actions