Updates coding standard to something PSR-12-ish

.gitignore

@@ -76,5 +76,5 @@ Themes/default/scripts/minified.js
 Themes/default/css/minified.css
 upgrade-helper.php
 .vscode/
-
+.php-cs-fixer.cache
 vendor/

.php-cs-fixer.dist.php

@@ -0,0 +1,163 @@
+<?php
+
+/**
+ * Simple Machines Forum (SMF)
+ *
+ * @package SMF
+ * @author Simple Machines https://www.simplemachines.org
+ * @copyright 2023 Simple Machines and individual contributors
+ * @license https://www.simplemachines.org/about/smf/license.php BSD
+ *
+ * @version 3.0 Alpha 1
+ */
+
+$finder = (new PhpCsFixer\Finder())
+	->in(__DIR__ . '/Sources')
+	// Don't touch libraries.
+	->exclude([
+		'minify',
+		'random_compat',
+		'ReCaptcha',
+	])
+	// Work with PHP files.
+	->name('*.php')
+	// Skip all index.php files.
+	->notName('index.php')
+	// Skip Unicode data files, but not Utf8String.php.
+	->notPath('/Unicode\/(?!Utf8String).*\.php/')
+	// Skip anything being ignored in .gitignore.
+	->ignoreVCSIgnored(true);
+
+return (new PhpCsFixer\Config())
+	->setRules([
+		'@PSR12' => true,
+		'no_closing_tag' => false,
+		'concat_space' => ['spacing' => 'one'],
+		'array_syntax' => ['syntax' => 'short'],
+		'ordered_imports' => [
+			'imports_order' => [
+				'class',
+				'function',
+				'const',
+			],
+			'sort_algorithm' => 'alpha',
+		],
+		'no_leading_namespace_whitespace' => true,
+		'no_trailing_comma_in_singleline' => true,
+		'normalize_index_brace' => true,
+		'whitespace_after_comma_in_array' => true,
+		'class_reference_name_casing' => true,
+		'cast_spaces' => ['space' => 'single'],
+		'single_line_comment_spacing' => true,
+		'include' => true,
+		'no_superfluous_elseif' => true,
+		'no_useless_else' => true,
+		'simplified_if_return' => true,
+		'trailing_comma_in_multiline' => [
+			'after_heredoc' => true,
+			'elements' => [
+				'arguments',
+				'arrays',
+				'match',
+				'parameters',
+			],
+		],
+		'lambda_not_used_import' => true,
+		'nullable_type_declaration_for_default_null_value' => true,
+		'nullable_type_declaration' => ['syntax' => 'question_mark'],
+		'no_unused_imports' => true,
+		'combine_consecutive_issets' => true,
+		'combine_consecutive_unsets' => true,
+		'operator_linebreak' => [
+			'only_booleans' => true,
+			'position' => 'beginning',
+		],
+		'standardize_not_equals' => true,
+		'ternary_to_null_coalescing' => true,
+		'phpdoc_indent' => true,
+		'phpdoc_line_span' => [
+			'const' => 'multi',
+			'property' => 'multi',
+			'method' => 'multi',
+		],
+		'phpdoc_no_access' => true,
+		'phpdoc_no_useless_inheritdoc' => true,
+		'phpdoc_order' => [
+			'order' => [
+				'param',
+				'throws',
+				'return',
+			],
+		],
+		'phpdoc_no_empty_return' => true,
+		'phpdoc_param_order' => true,
+		'phpdoc_scalar' => [
+			'types' => [
+				'boolean',
+				'callback',
+				'double',
+				'integer',
+				'real',
+				'str',
+			],
+		],
+		'phpdoc_to_comment' => [
+			'ignored_tags' => ['todo'],
+		],
+		'phpdoc_trim_consecutive_blank_line_separation' => true,
+		'phpdoc_types' => [
+			'groups' => ['alias', 'meta', 'simple'],
+		],
+		'phpdoc_var_without_name' => true,
+		'no_useless_return' => true,
+		'simplified_null_return' => true,
+		'no_empty_statement' => true,
+		'no_singleline_whitespace_before_semicolons' => true,
+		'escape_implicit_backslashes' => [
+			'double_quoted' => true,
+			'heredoc_syntax' => true,
+			'single_quoted' => true,
+		],
+		'explicit_string_variable' => true,
+		'simple_to_complex_string_variable' => true,
+		'single_quote' => true,
+		'array_indentation' => true,
+		'blank_line_before_statement' => [
+			'statements' => [
+				'break',
+				'case',
+				'continue',
+				'declare',
+				'default',
+				'do',
+				'exit',
+				'for',
+				'foreach',
+				'goto',
+				'if',
+				'include',
+				'include_once',
+				'require',
+				'require_once',
+				'return',
+				'switch',
+				'throw',
+				'try',
+				'while',
+				'yield',
+				'yield_from',
+			],
+		],
+		'heredoc_indentation' => ['indentation' => 'start_plus_one'],
+		'method_chaining_indentation' => true,
+		'no_spaces_around_offset' => [
+			'positions' => ['inside', 'outside'],
+		],
+		'type_declaration_spaces' => [
+			'elements' => ['function', 'property'],
+		],
+	])
+	->setIndent("\t")
+	->setFinder($finder);
+
+?>