wordpress在php文件中添加密码保护的隐藏内容

I am using this plugin https://wordpress.org/plugins/content-protector/

Password protected content

Enter the correct password to view the content

[passster password="123456"]Your content here[/passster]

I don't know how to use short code in php

<!--<hide content>-->
    <ul class="TPlayerNv">
                            <?php echo $optplayer; ?>
                        </ul>
                        <div class="TPlayerCn BgA">
                            <div class="EcBgA" style="background-color:#EEEEEE!important;"> 
                                <div class="TPlayer">
                                    <?php echo $player; ?>
                                    <span class="AAIco-lightbulb_outline lgtbx-lnk"></span>
                                </div>
                            </div>
                        </div>
                        <span class="lgtbx"></span>
    <!--</hide content>-->

</div>

A normal way to call a shortcode in any PHP file is given below :

<?php 

 echo do_shortcode('[passster password="123456"]Your content here[/passster]');

?>

Hope it helps you to get the desired output. Please check.

In wordpress to write shortcode, please check below link.

https://developer.wordpress.org/reference/functions/do_shortcode/

<?php echo do_shortcode('[name_of_shortcode]'); ?>