Coloca esto en tu web
Código PHP:
<a href="javascript: void(0);" onClick="window.open('http://twitter.com/home?status=http://<? echo $_SERVER['HTTP_HOST'].substr($_SERVER['PHP_SELF'],0,(strrpos($_SERVER['PHP_SELF'],"/")+1));?>redesociales.php?uri=<?=base64_encode($_SERVER['REQUEST_URI'])?>','ventanacompartir', 'toolbar=0, status=0, width=650, height=450');"><img style="border:none; text-decoration:none" src="imagenes/twitter.png"></a>
<a href="javascript: void(0);" onClick="window.open('http://www.facebook.com/sharer.php?u=http://<? echo $_SERVER['HTTP_HOST'].substr($_SERVER['PHP_SELF'],0,(strrpos($_SERVER['PHP_SELF'],"/")+1));?>redesociales.php?uri=<?=base64_encode($_SERVER['REQUEST_URI'])?>','ventanacompartir', 'toolbar=0, status=0, width=650, height=450');"><img style="border:none; text-decoration:none" src="imagenes/facebook.png"></a>
<g:plusone size="medium"></g:plusone>
<script type="text/javascript" src="https://apis.google.com/js/plusone.js"></script>
ahora crea esta pagina esto en tu sitio.
pagina redesociales.php
Código PHP:
<?
$id= str_replace(str_replace("redesociales.php","",$_SERVER[PHP_SELF]),"",base64_decode($_GET['uri']));
header("location: $id");
?>