Adding shortcode to php page

I wanted to know how to add the shortcode to php page so that when one click on a post, a lightbox will show up with post content and you can go back and forth to next post in the lightbox…

This is my actual post loop in a page

<?php if ( $the_query->have_posts() ) : ?>
<?php
// the loop
while ( $the_query->have_posts() ) : $the_query->the_post();
?>
<div class="proyectpost">
            <article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>

            <div class="innerpost">
            <a href="<?php the_permalink(); ?>" title="Permanent Link to <?php the_title_attribute(); ?>">
            <?php
        	// Get post meta that is already set
        	$custom_values = get_post_meta($post->ID, 'en_proceso_class', true);
    		?>
             <div class="postthumbnail <?php echo $custom_values; ?>">
            <?php if ( has_post_thumbnail() ) { // check if the post has a Post Thumbnail assigned to it.
	$image_src = wp_get_attachment_image_src( get_post_thumbnail_id(),'full' );
     echo '<img src="' . $image_src[0]  . '" width="100%"  />';
	} ?>
    		</div>
            <div class="posttitle">
		<h2><?php the_title(); ?></h2>
        <span><?php echo get_post_meta($post->ID, 'location', true); ?></span>
			</div><!-- .entry-header -->
 			</a>
</div>
</article><!-- #post-## -->
</div>
<?php endwhile; ?>

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