如何回显包含文件处理的信息

Question

how can i echo the information processed by an included file,: please explain

<div class="col-lg-8">
    <a id="toggle" onclick="showorhide('phorder')"  class="btn btn-default" >Show / Hide <? echo $phname; ?> Transactions History</a>
    <br><br>
    <div id="phorder">
        <? include ("phtrx.php"); ?>
    </div>
    <br><br>
    <a id="toggle" onclick="showorhide('ghorder')"  class="btn btn-default" >Show / Hide <? echo $phname; ?> Transactions History</a>
    <br><br>
    <div id="ghorder">
        <? include ("ghtrx.php"); ?>
    </div>
</div>
<div class="col-lg-4">
    <div class="ui green buttons">
        <a id="toggle" onclick="showorhide('phlist')" class="btn btn-default" >Show / Hide <? echo $skph; ?> Request</a>
    </div>
</div>

see the code above, please explain better

</div>

Answer 1

file-to-include.php:

<?php $who="world"; ?>

file1.php:

<?php include 'file-to-include.php' ;?>
Hello <?php echo $who; ?>!