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name	type	size	perms	modified	actions
[parent directory]
ByteOrderMarkSniff.php	file	2,461 B	0644	2026-08-06 00:17:32	edit
EndFileNewlineSniff.php	file	2,269 B	0644	2026-08-06 00:17:32	edit
EndFileNoNewlineSniff.php	file	2,490 B	0644	2026-08-06 00:17:32	edit
ExecutableFileSniff.php	file	1,726 B	0644	2026-08-06 00:17:32	edit
InlineHTMLSniff.php	file	2,227 B	0644	2026-08-06 00:17:32	edit
LineEndingsSniff.php	file	4,268 B	0644	2026-08-06 00:17:32	edit
LineLengthSniff.php	file	6,549 B	0644	2026-08-06 00:17:32	edit
LowercasedFilenameSniff.php	file	1,965 B	0644	2026-08-06 00:17:32	edit
OneClassPerFileSniff.php	file	1,573 B	0644	2026-08-06 00:17:32	edit
OneInterfacePerFileSniff.php	file	1,601 B	0644	2026-08-06 00:17:32	edit
OneObjectStructurePerFileSniff.php	file	1,710 B	0644	2026-08-06 00:17:32	edit
OneTraitPerFileSniff.php	file	1,581 B	0644	2026-08-06 00:17:32	edit

editing: OneClassPerFileSniff.php

<?php
/**
 * Checks that only one class is declared per file.
 *
 * @author    Andy Grunwald <andygrunwald@gmail.com>
 * @copyright 2010-2014 Andy Grunwald
 * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/HEAD/licence.txt BSD Licence
 */

namespace PHP_CodeSniffer\Standards\Generic\Sniffs\Files;

use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Sniffs\Sniff;

class OneClassPerFileSniff implements Sniff
{

/**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array<int|string>
     */
    public function register()
    {
        return [T_CLASS];

}//end register()

/**
     * Processes this sniff, when one of its tokens is encountered.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The file being scanned.
     * @param int                         $stackPtr  The position of the current token in
     *                                               the stack passed in $tokens.
     *
     * @return void
     */
    public function process(File $phpcsFile, $stackPtr)
    {
        $tokens = $phpcsFile->getTokens();
        $start  = ($stackPtr + 1);
        if (isset($tokens[$stackPtr]['scope_closer']) === true) {
            $start = ($tokens[$stackPtr]['scope_closer'] + 1);
        }

$nextClass = $phpcsFile->findNext($this->register(), $start);
        if ($nextClass !== false) {
            $error = 'Only one class is allowed in a file';
            $phpcsFile->addError($error, $nextClass, 'MultipleFound');
        }

}//end process()

}//end class

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