onfig for PHP-CS-Fixer ver 2 (based on Style CI's Recommended Preset - https://styleci.readme.io/v1.0/docs/presets#section-recommended)

.php_cs

<?php

$rules = [
    'binary_operator_spaces' => ['align_double_arrow' => true, 'align_equals' => false],
    'blank_line_after_namespace' => true,
    'blank_line_after_opening_tag' => true,
    'blank_line_before_return' => true,
    'braces' => true,
    'cast_spaces' => true,
    'class_definition' => true,
    'concat_space' => ['spacing' => 'none'],
    'declare_equal_normalize' => true,
    'elseif' => true,
    'encoding' => true,
    'full_opening_tag' => true,
    'function_declaration' => true,
    'function_typehint_space' => true,
    'hash_to_slash_comment' => true,
    'heredoc_to_nowdoc' => true,
    'include' => true,
    // 'length_ordered_imports' => true, // Waiting for pull request getting merged: https://github.com/FriendsOfPHP/PHP-CS-Fixer/pull/2280
    'lowercase_cast' => true,
    'lowercase_constants' => true,
    'lowercase_keywords' => true,
    'method_argument_space' => true,
    'method_separation' => true,
    'visibility_required' => true,
    'native_function_casing' => true,
    'new_with_braces' => true,
    'no_alias_functions' => true,
    'no_blank_lines_after_class_opening' => true,
    'no_blank_lines_after_phpdoc' => true,

    // StyleCI only fixers. https://blog.alt-three.com/imports-by-length/
    // 'no_blank_lines_after_throw' => true, 
    // 'no_blank_lines_between_imports' => true
    // 'no_blank_lines_between_traits' => true,
    // 
    'no_closing_tag' => true,
    'no_empty_phpdoc' => true,
    'no_empty_statement' => true,
    'no_extra_consecutive_blank_lines' => true,
    'no_leading_import_slash' => true,
    'no_leading_namespace_whitespace' => true,
    'no_multiline_whitespace_around_double_arrow' => true,
    'no_multiline_whitespace_before_semicolons' => true,
    'no_short_bool_cast' => true,
    'no_singleline_whitespace_before_semicolons' => true,
    'no_spaces_after_function_name' => true,
    // 'no_spaces_inside_offset' => true, // Ersetzt durch no_spaces_around_offset
    // 'no_spaces_outside_offset' => true, // Ersetzt durch no_spaces_around_offset
    'no_spaces_around_offset' => true,
    'no_spaces_inside_parenthesis' => true,
    'indentation_type' => true,
    'no_trailing_comma_in_list_call' => true,
    'no_trailing_comma_in_singleline_array' => true,
    'no_trailing_whitespace' => true,
    'no_trailing_whitespace_in_comment' => true,
    'no_unneeded_control_parentheses' => true,
    'no_unreachable_default_argument_value' => true,
    'no_unused_imports' => true,
    'no_useless_return' => true,
    'no_whitespace_before_comma_in_array' => true,
    'no_whitespace_in_blank_line' => true,
    'normalize_index_brace' => true,
    'not_operator_with_successor_space' => true,
    'object_operator_without_whitespace' => true,
    'phpdoc_align' => true,
    'phpdoc_indent' => true,
    'phpdoc_inline_tag' => true,
    'phpdoc_no_access' => true,
    'phpdoc_no_package' => true,
    'phpdoc_order' => true,
    'phpdoc_scalar' => true,
    'phpdoc_separation' => true,
    'phpdoc_single_line_var_spacing' => true,
    'phpdoc_summary' => true,
    'phpdoc_to_comment' => true,
    'phpdoc_trim' => true,
    'phpdoc_no_alias_tag' => ['type' => 'var'],
    'phpdoc_types' => true,
    'phpdoc_var_without_name' => true,
    'no_mixed_echo_print' => ['use' => 'echo'],
    'psr4' => true,
    'self_accessor' => true,
    'array_syntax' => ['syntax' => 'short'],
    'short_scalar_cast' => true,
    'simplified_null_return' => true,
    'single_blank_line_at_eof' => true,
    'single_blank_line_before_namespace' => true,
    'single_class_element_per_statement' => true,
    'single_import_per_statement' => true,
    'single_line_after_imports' => true,
    'single_quote' => true,
    'space_after_semicolon' => true,
    'standardize_not_equals' => true,
    'switch_case_semicolon_to_colon' => true,
    'switch_case_space' => true,
    'ternary_operator_spaces' => true,
    'trailing_comma_in_multiline_array' => true,
    'trim_array_spaces' => true,
    'unary_operator_spaces' => true,
    'line_ending' => true,
    'whitespace_after_comma_in_array' => true,
];

$finder = PhpCsFixer\Finder::create()
    ->exclude([
      'node_modules',
      'vendor',
    ])
    ->in(__DIR__)
;

return PhpCsFixer\Config::create()
    ->setRules($rules)
    ->setFinder($finder)
    ->setUsingCache(true)
    ->setRiskyAllowed(true)
    ;