Social Share Button Snippet simpleshare_socialbuttons function

functions.php

function simpleshare_socialbuttons($content) {
	global $post;
	if(is_single() || is_page()){
	
		// Get current page URL 
		$simpleshareURL = urlencode(get_permalink());
 
		// Get current page title
		$simpleshareTitle = str_replace( ' ', '%20', get_the_title());
		
		// Get Post Thumbnail
		$simpleshareThumbnail = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'full' );
 
		// Construct sharing URL
		$twitterURL = 'https://twitter.com/intent/tweet?text='.$simpleshareTitle.'&url='.$simpleshareURL.'&via=simpleshare';
		$facebookURL = 'https://www.facebook.com/sharer/sharer.php?u='.$simpleshareURL;
		$googleURL = 'https://plus.google.com/share?url='.$simpleshareURL;
		$linkedInURL = 'https://www.linkedin.com/shareArticle?mini=true&url='.$simpleshareURL.'&title='.$simpleshareTitle;
 
		// Add sharing button at the end of post/page content
		$content .= '<!-- simpleshare.com social sharing. Get your copy here: http://simpleshare.me/1VIxAsz -->';
		$content .= '<div class="simpleshare-social">';
		$content .= '<h5>SHARE ON</h5> <a class="simpleshare-link simpleshare-twitter" href="'. $twitterURL .'" target="_blank">Twitter</a>';
		$content .= '<a class="simpleshare-link simpleshare-facebook" href="'.$facebookURL.'" target="_blank">Facebook</a>';
		$content .= '<a class="simpleshare-link simpleshare-googleplus" href="'.$googleURL.'" target="_blank">Google+</a>';
		$content .= '<a class="simpleshare-link simpleshare-linkedin" href="'.$linkedInURL.'" target="_blank">LinkedIn</a>';
		$content .= '</div>';
		
		return $content;
	}else{
		// if not a post/page then don't include sharing button
		return $content;
	}
};
add_filter( 'the_content', 'simpleshare_socialbuttons');