Social Share Button Snippet simpleshare_socialbuttons

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');

style.css

.simpleshare-link {
    padding: 2px 8px 4px 8px !important;
    color: white;
    font-size: 12px;
    border-radius: 2px;
    margin-right: 2px;
    cursor: pointer;
    -moz-background-clip: padding;
    -webkit-background-clip: padding-box;
    box-shadow: inset 0 -3px 0 rgba(0,0,0,.2);
    -moz-box-shadow: inset 0 -3px 0 rgba(0,0,0,.2);
    -webkit-box-shadow: inset 0 -3px 0 rgba(0,0,0,.2);
    margin-top: 2px;
    display: inline-block;
    text-decoration: none;
}
 
.simpleshare-link:hover,.simpleshare-link:active {
    color: white;
}
 
.simpleshare-twitter {
    background: #00aced;
}
 
.simpleshare-twitter:hover,.simpleshare-twitter:active {
    background: #0084b4;
}
 
.simpleshare-facebook {
    background: #3B5997;
}
 
.simpleshare-facebook:hover,.simpleshare-facebook:active {
    background: #2d4372;
}
 
.simpleshare-googleplus {
    background: #D64937;
}
 
.simpleshare-googleplus:hover,.simpleshare-googleplus:active {
    background: #b53525;
}
 
.simpleshare-linkedin {
    background: #0074A1;
}
 
.simpleshare-linkedin:hover,.simpleshare-linkedin:active {
    background: #006288;
}
 
.simpleshare-social {
    margin: 20px 0px 25px 0px;
    -webkit-font-smoothing: antialiased;
    font-size: 12px;
}