newsupernova/dev/tests/static/framework/Magento/Sniffs/Functions/OutputBufferingSniff.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

namespace Magento\Sniffs\Functions;

/**
 * Sniff prohibiting usage of output buffering functions.
 */
class OutputBufferingSniff extends \PHP_CodeSniffer\Standards\Generic\Sniffs\PHP\ForbiddenFunctionsSniff
{
    public $forbiddenFunctions = ['ob_start' => null];

    /**
     * @inheritdoc
     */
    protected function addError($phpcsFile, $stackPtr, $function, $pattern = null)
    {
        $data = [$function];
        $error = 'The usage of %s() is forbidden';
        $type = 'Found';

        if ($this->error === true) {
            $phpcsFile->addError($error, $stackPtr, $type, $data);
        } else {
            $phpcsFile->addWarning($error, $stackPtr, $type, $data);
        }
    }
}