Add Share Links to WordPress Themes with a single function

single.php

// copyright Danny Wahl | iyware.com | License: CC-BY-4.0

function shareLinks(array $sites = NULL) {
	$share = array();
    $share["siteTitle"] = get_bloginfo('name');
    $share["siteURL"] =  get_site_url();
    $share["postTitle"] = get_the_title();
    $share["postURL"] = remove_query_arg( 'p', get_permalink());
    $share["postCategory"] = get_the_category();
    $share["postExcerpt"] = wp_strip_all_tags(get_the_excerpt());
    $share["postShortExcerpt"] = substr($share["postExcerpt"], 0, 90);
    $share["postImage"] = wp_get_attachment_url(get_post_thumbnail_id());

	if(empty($share["postImage"])) { //No Featured image, get first inline image
		$args = array(
			'numberposts' => 1,
			'order' => 'ASC',
			'post_mime_type' => 'image',
			'post_parent' => $postID,
			'post_status' => null,
			'post_type' => 'attachment',
		);
		$postAttachments = get_children($args);
		if($postAttachments) {
			$src = current($postAttachments);
			$src = wp_get_attachment_image_src($src->ID, 'full');
			$share["postImage"] = $src[0];
		}
		unset($args);
		unset($postAttachments);
	}

	$hash = '';
	$dlbHash = '';
	foreach($share["postCategory"] as $value) {
		$val = $value->cat_name;
		$val = str_replace(' ', '', $val);
		$hash .= ' #' . $val . '';
		$dblhash .= ' #' . $val . '#';
	}
	$share["postCategory"] = $hash;
	$share["postDblCategory"] = $dblhash;
	unset($hash);
	unset($dblHash);
	
	$networks = array();
	$networks["email"] = [
		"name"  => "E-mail",
		"url"   => "mailto:?",
		"query" => [
		    "subject" => $share["siteTitle"] . ": " . $share["postTitle"],
			"body"    => $share["postTitle"] . "\r\n" . $share["postURL"] . "\r\n\r\n" . $share["postExcerpt"],
		],
	];
	$networks["twitter"] = [
		"name"  => "twitter",
		"url"   => "https://twitter.com/home?",
		"query" => [
		    "status" => $share["postURL"] . $share["postCategory"],
		],
	];
	$networks["facebook"] = [
		"name"  => "Facebook",
		"url"   => "https://www.facebook.com/sharer/sharer.php?",
		"query" => [
			"u" => $share["postURL"],
		],
	];
	$networks["googlePlus"] = [
		"name"  => "Google+",
		"url"   => "https://plus.google.com/share?",
		"query" => [
			"url" => $share["postURL"],
		],
	];
	$networks["linkedin"] = [
		"name"  => "LinkedIn",
		"url"   => "https://www.linkedin.com/shareArticle?",
		"query" => [
			"mini"    => "true",
			"url"     => $share["postURL"],
			"title"   => $share["postTitle"],
			"summary" => $share["postExcerpt"],
			"source"  => $share["siteTitle"],
		],
	];
	$networks["pinterest"] = [
		"name"  => "Pinterest",
		"url"   => "https://pinterest.com/pin/create/button/?",
		"query" => [
			"url"         => $share["postURL"],
			"media"       => $share["postImage"],
			"description" => $share["postShortExcerpt"], 
		],
	];
	$networks["tumblr"] = [
		"name"  => "tumblr",
		"url"   => "http://www.tumblr.com/share/link?",
		"query" => [
			"url"         => $share["postURL"],
			"name"        => $share["postTitle"],
			"description" => $share["postExcerpt"],
		],
	];
	$networks["reddit"] = [
		"name"  => "reddit",
		"url"   => "http://www.reddit.com/submit/?",
		"query" => [
			"url"   => $share["postURL"],
			"title" => $share["postTitle"],
		],
	];
	$networks["xing"] = [
		"name"  => "Xing",
		"url"   => "https://www.xing.com/spi/shares/new?",
		"query" => [
			"sc_p" => "xing-share",
			"url"  => $share["postURL"],
		],
	];
	$networks["vk"] = [
		"name"  => "VK",
		"url"   => "https://vk.com/share.php?",
		"query" => [
			"url"         => $share["postURL"],
			"title"       => $share["postTitle"],
			"description" => $share["postExcerpt"],
			"image"       => $share["postImage"],
			"noparse"     => "true",
		],
	];
	$networks["buffer"] = [
		"name"  => "buffer",
		"url"   => "https://bufferapp.com/add/?",
		"query" => [
			"url"  => $share["postURL"],
			"text" => $share["postShortExcerpt"],
		],
	];
	$networks["stumbleupon"] = [
		"name"  => "StumbleUpon",
		"url"   => "https://www.stumbleupon.com/submit?",
		"query" => [
			"url"   => $share["postURL"],
			"title" => $share["postTitle"],
		],
	];
	$networks["sinaWeibo"] = [
		"name"  => "新浪微博",
		"url"   => "http://service.weibo.com/share/share.php?",
		"query" => [
			"url"   => $share["postURL"],
			"pic"   => $share["postImage"],
			"title" => $share["postTitle"] . "%0D%0A" . $share["postShortExcerpt"] . $share["postDblCategory"],
		],
	];
	$networks["baidu"] = [
		"name"  => "Baidu空间",
		"url"   => "http://hi.baidu.com/pub/show/share?",
		"query" => [
			"url"   => $share["postURL"],
			"title" => $share["postTitle"],
		],
	];
	$networks["renren"] = [
		"name"  => "人人网",
		"url"   => "http://share.renren.com/share/buttonshare?",
		"query" => [
			"link"  => $share["postURL"],
			"title" => $share["postTitle"],
		],
	];
	$networks["tencentWeibo"] = [
		"name"  => "腾讯微博",
		"url"   => "http://v.t.qq.com/share/share.php?",
		"query" => [
			"title" => $share["postTitle"] . " " . $share["postShortExcerpt"] . $share["postDblCategory"],
			"url"   => $share["postURL"],
		],
	];
	$networks["qzone"] = [
		"name"  => "QQ空间",
		"url"   => "http://sns.qzone.qq.com/cgi-bin/qzshare/cgi_qzshare_onekey?",
		"query" => [
			"title"   => $share["postTitle"],
			"url"     => $share["postURL"],
			"summary" => $share["postShortExcerpt"],
		],
	];
	$networks["pengyou"] = [
		"name"  => "腾讯朋友网",
		"url"   => "http://sns.qzone.qq.com/cgi-bin/qzshare/cgi_qzshare_onekey?",
		"query" => [
			"to" => "pengyou",
			"title"   => $share["postTitle"],
			"url"     => $share["postURL"],
			"summary" => $share["postShortExcerpt"],
		],
	];
	
	$output = '';
	if(isset($sites)) { // Only output requested sites
		foreach($sites as $site) {
		    if(array_key_exists($site, $networks)){
				$output .= '<li><a class="' . $site . '" href="' . $networks[$site]["url"] . http_build_query($networks[$site]["query"], null, "&", PHP_QUERY_RFC3986) . '">' . $networks[$site]["name"] . '</a></li>';
			}
		}
	} else { // Output all the sites!
		foreach($networks as $network){
			$output .= '<li><a class="' . key($networks) . '" href="' . $network["url"] . http_build_query($network["query"], null, "&", PHP_QUERY_RFC3986) . '">' . $network["name"] . '</a></li>';
		}
	}
	if(!empty($output)) {
		$output = '<ul>' . $output . '</ul>';
	}
	return $output;
}
echo shareLinks();