首先是用 CodeIgniter 4 官方文件建立出的資料後，要跑 PHP Coding Standards Fixer 時會出現要修正語法的問題
```
// https://www.codeigniter.com/user_guide/installation/installing_composer.html
% composer create-project codeigniter4/appstarter project-root
% ./vendor/bin/php-cs-fixer fix --dry-run -v .
PHP CS Fixer 3.9.5 Grand Awaiting by Fabien Potencier and Dariusz Ruminski.
PHP runtime: 7.4.30
Loaded config CodeIgniter4 Coding Standards from "/path/./.php-cs-fixer.dist.php".
Using cache file ".php-cs-fixer.cache".
Paths from configuration file have been overridden by paths provided as command arguments.
.....F......................................F............. 58 / 58 (100%)
Legend: ?-unknown, I-invalid file syntax (file ignored), S-skipped (cached or empty file), .-no changes, F-fixed, E-error
1) app/Config/Logger.php (ordered_imports)
2) app/Views/errors/html/error_exception.php (braces, unary_operator_spaces, not_operator_with_successor_space)
Checked all files in 1.104 seconds, 16.000 MB memory used
```
然後故意降版本到 v3.8.0 又可以正常
```
% mv composer.json composer.json-bak
% composer require friendsofphp/php-cs-fixer:3.8.0 --dev
% ./vendor/bin/php-cs-fixer fix --dry-run -v .
PHP CS Fixer 3.8.0 BerSzcz against war! by Fabien Potencier and Dariusz Ruminski.
PHP runtime: 7.4.30
Loaded config default.
Using cache file ".php-cs-fixer.cache".
.......................................................... 58 / 58 (100%)
Legend: ?-unknown, I-invalid file syntax (file ignored), S-skipped (cached or empty file), .-no changes, F-fixed, E-error
Checked all files in 0.303 seconds, 14.000 MB memory used
```
```
% cat .php-cs-fixer.dist.php
<?php
use CodeIgniter\CodingStandard\CodeIgniter4;
use Nexus\CsConfig\Factory;
return Factory::create(new CodeIgniter4())->forProjects();
% ./vendor/bin/php-cs-fixer fix --dry-run -v .
PHP CS Fixer 3.9.5 Grand Awaiting by Fabien Potencier and Dariusz Ruminski.
PHP runtime: 7.4.30
Loaded config CodeIgniter4 Coding Standards from "/path/./.php-cs-fixer.dist.php".
Using cache file ".php-cs-fixer.cache".
Paths from configuration file have been overridden by paths provided as command arguments.
.....F......................................F............. 58 / 58 (100%)
Legend: ?-unknown, I-invalid file syntax (file ignored), S-skipped (cached or empty file), .-no changes, F-fixed, E-error
1) app/Config/Logger.php (ordered_imports)
2) app/Views/errors/html/error_exception.php (braces, unary_operator_spaces, not_operator_with_successor_space)
Checked all files in 1.104 seconds, 16.000 MB memory used
```
開始先找一下怎樣略過那兩個檔案的用法：
```
% cat .php-cs-fixer.dist.php
<?php
use CodeIgniter\CodingStandard\CodeIgniter4;
use Nexus\CsConfig\Factory;
use PhpCsFixer\Finder;
// https://github.com/codeigniter4/CodeIgniter4/blob/develop/.php-cs-fixer.dist.php
$finder = Finder::create()
->files()
->notPath([
'app/Config/Logger.php',
'app/Views/errors/html/error_exception.php',
]);
// https://github.com/NexusPHP/cs-config/blob/develop/src/Factory.php
//return Factory::create(new CodeIgniter4())->forProjects();
return Factory::create(new CodeIgniter4(), [], [
'finder' => $finder,
])->forProjects();
% ./vendor/bin/php-cs-fixer fix --dry-run .
Loaded config CodeIgniter4 Coding Standards from "/path/./.php-cs-fixer.dist.php".
Using cache file ".php-cs-fixer.cache".
Checked all files in 0.032 seconds, 14.000 MB memory used
```
接著去 Windows 跑：
```
C:\path>.\vendor\bin\php-cs-fixer fix --dry-run .
PHP CS Fixer 3.9.1 Grand Awaiting by Fabien Potencier and Dariusz Ruminski.
PHP runtime: 7.4.30
Loaded config CodeIgniter4 Coding Standards from "C:\path\.\.php-cs-fixer.dist.php".
Using cache file ".php-cs-fixer.cache".
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF 56 / 56 (100%)
Legend: ?-unknown, I-invalid file syntax (file ignored), S-skipped (cached or empty file), .-no changes, F-fixed, E-error
1) app\Common.php (line_ending)
...
55) tests\_support\Libraries\ConfigReader.php (line_ending)
56) tests\_support\Models\ExampleModel.php (line_ending)
Checked all files in 1.187 seconds, 16.000 MB memory used
```
最後再加個 line_ending 來處理一下：
```
% cat .php-cs-fixer.dist.php
<?php
use CodeIgniter\CodingStandard\CodeIgniter4;
use Nexus\CsConfig\Factory;
use PhpCsFixer\Finder;
// https://github.com/codeigniter4/CodeIgniter4/blob/develop/.php-cs-fixer.dist.php
$finder = Finder::create()
->files()
->notPath([
'app/Config/Logger.php',
'app/Views/errors/html/error_exception.php',
]);
// https://github.com/NexusPHP/cs-config/blob/develop/src/Factory.php
//return Factory::create(new CodeIgniter4())->forProjects();
return Factory::create(new CodeIgniter4(), [], [
'finder' => $finder,
// https://github.com/FriendsOfPHP/PHP-CS-Fixer/issues/3955
'lineEnding' => PHP_EOL,
])->forProjects();
```
收工!
