Final Working PHP Source Code for the Facebook Like Button - PHP

Here is the source code that binds the variable of your blog post's URL to the Facebook Like button appearing on the page.

<?php
function getPostURL() {
 $postURL = 'http';
 if ($_SERVER["HTTPS"] == "on") {$postURL .= "s";}
 $postURL .= "://";
 if ($_SERVER["SERVER_PORT"] != "80") {
  $postURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
 } else {
  $postURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
 }
 return $postURL;
}
$postURL=getPostURL();
 
echo '<iframe src="http://www.facebook.com/widgets/like.php?href='.$postURL.'"
        scrolling="no" frameborder="0"
        style="border:none; width:450px; height:40px"></iframe>';
?>

If you are using WordPress as a blogging platform, you can easily copy and paste the code above just before the "the_content" function:

<?php the_content( __('<p>Read the rest of this entry &raquo;</p>', 'arras') ); ?>

It should then look like the the screen shot below:

If your theme background is black, to make the text more visible on a black/dark background, use the colorscheme=dark attribute, so the iframe code will become:

echo '<iframe src="http://www.facebook.com/widgets/like.php?href='.$postURL.'&amp;colorscheme=dark"
        scrolling="no" frameborder="0"
        style="border:none; width:450px; height:40px"></iframe>';
 
You can as well adjust the height (default as 40px) to make it look appropriate in your web page.