.php-cs-fixer.php

<?php

$finder = PhpCsFixer\Finder::create()
    ->in('src')
    ->in('tests');

$config = new PhpCsFixer\Config();

return $config->setRules(
    [
        '@PSR12' => true,
        'array_syntax' => ['syntax' => 'short'],
        'binary_operator_spaces' => [
            'default' => 'single_space',
            'operators' => ['|' => 'no_space'],
        ],
        'blank_line_after_namespace' => true,
        'blank_line_after_opening_tag' => true,
        'blank_line_before_statement' => [
            'statements' => ['return'],
        ],
        'braces' => true,
        'cast_spaces' => true,
        'class_definition' => true,
        'concat_space' => [
            'spacing' => 'none',
        ],
        'declare_equal_normalize' => true,
        'elseif' => true,
        'encoding' => true,
        'full_opening_tag' => true,
        'fully_qualified_strict_types' => true, // added by Shift
        'function_declaration' => true,
        'function_typehint_space' => true,
        'heredoc_to_nowdoc' => true,
        'include' => true,
        'increment_style' => ['style' => 'post'],
        'indentation_type' => true,
        'linebreak_after_opening_tag' => true,
        'line_ending' => true,
        'lowercase_cast' => true,
        'lowercase_keywords' => true,
        'lowercase_static_reference' => true, // added from Symfony
        'magic_method_casing' => true, // added from Symfony
        'magic_constant_casing' => true,
        'method_argument_space' => true,
        'native_function_casing' => true,
        'no_extra_blank_lines' => [
            'tokens' => [
                'extra',
                'throw',
                'use',
                'use_trait',
            ],
        ],
        'no_blank_lines_after_class_opening' => true,
        'no_blank_lines_after_phpdoc' => true,
        'no_closing_tag' => true,
        'no_empty_phpdoc' => true,
        'no_empty_statement' => true,
        'no_leading_import_slash' => true,
        'no_leading_namespace_whitespace' => true,
        'no_mixed_echo_print' => [
            'use' => 'echo',
        ],
        'no_multiline_whitespace_around_double_arrow' => true,
        'multiline_whitespace_before_semicolons' => [
            'strategy' => 'no_multi_line',
        ],
        'no_short_bool_cast' => true,
        'no_singleline_whitespace_before_semicolons' => true,
        'no_spaces_after_function_name' => true,
        'no_spaces_around_offset' => true,
        'no_spaces_inside_parenthesis' => 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_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,
        'ordered_imports' => ['sort_algorithm' => 'alpha'],
        'phpdoc_indent' => true,
        'phpdoc_no_access' => true,
        'phpdoc_no_package' => true,
        'phpdoc_no_useless_inheritdoc' => true,
        'phpdoc_scalar' => true,
        'phpdoc_single_line_var_spacing' => true,
        'phpdoc_summary' => true,
        'phpdoc_to_comment' => true,
        'phpdoc_trim' => true,
        'phpdoc_types' => true,
        'phpdoc_var_without_name' => true,
        'short_scalar_cast' => true,
        'simplified_null_return' => false, // disabled by Shift
        '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_line_comment_style' => [
            'comment_types' => ['hash'],
        ],
        '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,
        'visibility_required' => [
            'elements' => ['method', 'property'],
        ],
        'whitespace_after_comma_in_array' => true,    ]
)
    ->setFinder($finder);