This code snippets allows users to put social media buttons on their posts. This is code snippet for java-script free social media buttons. https://wpvkp.com/add-social-media-sharing-buttons-to-wordpress-without-plugin/

socialbuttons.php

<?php

// Function to handle the thumbnail request
function get_the_post_thumbnail_src($img)
{
  return (preg_match('~\bsrc="([^"]++)"~', $img, $matches)) ? $matches[1] : '';
}

function wpvkp_social_buttons($content) {
    global $post;
    if(is_singular() || is_home()){
    
        // Get current page URL 
        $sb_url = urlencode(get_permalink());
 
        // Get current page title
        $sb_title = str_replace( ' ', '%20', get_the_title());
        
        // Get Post Thumbnail for pinterest
        $sb_thumb = get_the_post_thumbnail_src(get_the_post_thumbnail());
 
        // Construct sharing URL without using any script
        $twitterURL = 'https://twitter.com/intent/tweet?text='.$sb_title.'&amp;url='.$sb_url.'&amp;via=wpvkp';
        $facebookURL = 'https://www.facebook.com/sharer/sharer.php?u='.$sb_url;
 
        // Based on popular demand added Pinterest too
        $pinterestURL = 'https://pinterest.com/pin/create/button/?url='.$sb_url.'&amp;media='.$sb_thumb[0].'&amp;description='.$sb_title;

        $gplusURL ='https://plus.google.com/share?url='.$sb_title.'';
 
        // Add sharing button at the end of page/page content
        $content .= '<div class="sb-social">';
        $content .= '<a href="'. $twitterURL .'" target="_blank"><i class="sb-icon font-twitter"></i></a>';
        $content .= '<a href="'.$facebookURL.'" target="_blank"><i class="sb-icon font-facebook"></i></a>';
        $content .= '<a href="'.$pinterestURL.'" target="_blank"><i class="sb-icon font-pinterest"></i></a>';
        $content .= '<a href="'.$gplusURL.'"><i class="sb-icon font-gplus"></i></a>';
        $content .= '</div>';
        
        return $content;
    }else{
        // if not a post/page then don't include sharing button
        return $content;
    }
};

// Enable the_content if you want to automatically show social buttons below your post.
// add_filter( 'the_content', 'wpvkp_social_buttons');

// This will create a wordpress shortcode [social].
// Please it in any widget and social buttons appear their.
// You will need to enabled shortcode execution in widgets.
add_shortcode('social','wpvkp_social_buttons');