将“$ Post-> ID”分配给自定义ID

So, for a post loop, $post->ID is used to get the post id's.

Is there a way to "change" it to a custom "id"?

Here is what I mean by it:

So, I have a page that is passed onto a template via ajax as following:

There is a first php template called "first.php".

In this file, I have a post loop which contains a button:

  $id = get_the_ID();   
  <?php echo '<button type="button" class="rh_show_image" data-post_id="' .$id. '">' ;?>
     <?php echo get_post_meta($post->ID, 'rh_image', true); ?>  
  <?php echo '</button>';?>

This button has data-post_id which contains the post id. When it is clicked, then a second.php is loaded via ajax:

<script>
jQuery(document).ready(function() {
    jQuery('.rh_show_image').click(function(e) {
        e.preventDefault();
        var rh_contact_form_id = jQuery(this).data("post_id");          
        jQuery.ajax({
            type: "GET",
            url: "<?php echo admin_url('admin-ajax.php'); ?>", 
            dataType: 'html',
            data: ({ action: 'rh_second_php', rhc_post_id: rh_contact_form_id}),
            success: function(data){
                  jQuery('#rh_iamge_' + rh_contact_form_id).html(data);                   
        },
        error: function(data)  
        {  
        alert("Error!");
        return false;
        }  
        }); 
 }); 
 });            
</script>

When the second.php is called, as you can see from the script above, the post_id of the post is saved and parsed onto the template (data: ({ action: 'rh_second_php', rhc_post_id: rh_contact_form_id}),)

Then in the second.php, I have the following:

 <!--Show title-->
 <?php echo get_the_title($_REQUEST['rhc_post_id']); ?>
 <!--Show image-->
 <div class="images">                                   
    <?php
        $I_will_call_you = callme_image();                  

         foreach ($I_will_call_you as $slideshowimage)
                {

                echo "<img src='{$slideshowimage}' />";
                }                               

    ?>
</div>

So, essentially, I am using $_REQUEST['rhc_post_id'] instead of $post->ID

Here is the problem

In the image div from the second.php, it does not show any images because it does not recognized the post id from $_REQUEST['rhc_post_id'].

So, is there a way to make it equal between $post->ID and $_REQUEST['rhc_post_id']?

Something like this: $_REQUEST['rhc_post_id'] = $post->ID

Thanks guys!

EDIT: The image div works fine when it is placed with a post loop, instead via ajax. So, the code itself works fine.

Edit 2: Syntax in the second.php is fixed now