- urlencode: documentation ( source)
<?php
$title=urlencode('Lambuzados');
$url=urlencode(' http://bit.ly/share-fb');
$summary=urlencode('Vem se lambuzar no Bob’s! http://bit.ly/share-fb #lambuzei');
$image=urlencode('http://www.bobsfa.com/lambuzados/img/cards/card12-share.jpg');
?>
http://www.facebook.com/sharer.php?s=100&p[title]=<?php echo $title;?>&p[summary]=<?php echo $summary;?>&p[url]=<?php echo $url; ?>&p[images][0]=<?php echo $image;?>