php/php.editor/test/unit/data/testfiles/parser/issueGH5585_02.php

<?php
/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
class T {

    public function test(): string {
        return "test method";
    }

    public function test2($param): string {
        return $param . PHP_EOL;
    }
}

$t = new T();
echo <<< HTML
    <span>{$t->test()}</span>
    {$t->test2(<<< X
        something
        something
    X)}

    HTML;

echo <<< HTML
    <span>{$t->test()}</span>
    {$t->test2(<<< 'X'



        something
        something

    X)}



    HTML;

echo <<< 'HTML'
    <span>{$t->test()}</span>
    {$t->test2(<<< X
        something

        something
    X)}


    HTML;