Data display in front end wordpress

For Post Type

<?php get_post_meta(get_the_ID(),'meta_key_name',true);?>

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For Register Customizer

<?php theme_mode('meta_key_name');?>

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For Settings Items

<?php get_option('meta_key_name');?>

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For Custom Widget

<?php get_option('meta_key_name');?>

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For User Profile Items
<?php echo get_avatar(get_the_author_meta("ID"));?> // avatar picture
<?php echo get_author_posts_url(get_the_author_meta('ID'));?> // user profile url
<?php echo ucfirst(get_the_author());?> // user name
<?php the_author_meta('description');?> // user description

<?php get_user_meta(get_the_author_meta('ID'),'meta_key_name',true);?> // from simple meta
<?php get_field('user_social_profile','user_'.get_the_author_meta('ID'));?> // from ACF plugin

==========================================================================================

// Attachment image info
<?php
 $id = '_id';
 $meta_img_id = get_post_meta(get_the_ID(),"meta_name$id",true); // get id
 $alt = get_post_meta($meta_img_id, '_wp_attachment_image_alt', true); // alt text
 $meta_title = get_the_title($meta_img_id);
?>

<?php
$id = '_id';
$meta_img_id = get_post_meta(get_the_ID(),"meta_name$id",true); // get id
$args = array(
        'post_type' => 'attachment',
        'posts_per_page'=>1,
        'post__in' => array($meta_img_id)
         );

    $attachments = get_posts($args);
    echo "<pre>";
    print_r($attachments);
    echo "</pre>";
    ?>

<?php
echo $alt = get_post_meta($meta_img_id, '_wp_attachment_image_alt', true);
echo $attachments[0]->post_title;
echo $attachments[0]->post_content;
echo $attachments[0]->post_excerpt;
?>


====================================================================================

// Get Theme information
/**
Theme Name: Philosophy
Theme URI: https://rrfiroze.xyz
Author: FIROZE ISLAM
Author URI: https://rrfiroze.xyz
Description: This is our pholosophy system theme.
Version: 0.1
License: GNU General Public License v2 or later
License URI: LICENSE
Text Domain: philosophy
Tags: blog,education "https://make.wordpress.org/themes/handbook/review/required/theme-tags/"
*/

<?php wp_get_theme()->get('Version');?>
<?php wp_get_theme()->get('License');?>