.php-cs-fixer.php

<?php
$finder = PhpCsFixer\Finder::create()
    ->in(__DIR__.'/src')
    ->in(__DIR__.'/tests')
;
return (new PhpCsFixer\Config())
    ->setRules([
        '@PSR2' => true,
        'array_syntax' => ['syntax' => 'short'],
        'concat_space' => ['spacing' => 'one'],
        'new_with_parentheses' => true,
        'no_blank_lines_after_phpdoc' => true,
        'no_empty_comment' => true,
        'no_empty_phpdoc' => true,
        'no_leading_import_slash' => true,
        'no_trailing_comma_in_singleline' => true,
        'no_unused_imports' => true,
        'ordered_imports' => ['imports_order' => null, 'sort_algorithm' => 'alpha'],
        'phpdoc_add_missing_param_annotation' => ['only_untyped' => true],
        'phpdoc_align' => true,
        'phpdoc_no_empty_return' => true,
        'phpdoc_order' => true,
        'phpdoc_scalar' => true,
        'phpdoc_separation' => true,
        'phpdoc_to_comment' => true,
        'phpdoc_types' => true,
        'psr_autoloading' => true,
        'return_type_declaration' => ['space_before' => 'none'],
        'blank_lines_before_namespace' => true,
        'single_quote' => true,
        'space_after_semicolon' => true,
        'ternary_operator_spaces' => true,
        'trailing_comma_in_multiline' => true,
        'trim_array_spaces' => true,
        'whitespace_after_comma_in_array' => true,
    ])
    ->setFinder($finder)
;