I’ve been seeing this question around lately and decided to create a mini-tutorial on how to put Facebook Like button on a WordPress blog.

1. Go to Appearance > Editor.
2. Load your index.php file
3. Look for your content loop, usually it should start with this: <?php the_content(); ?> some might have additional texts inside those parenthesis.
4. Add this:
<iframe style="border-bottom: medium none; border-left: medium none; width: 530px; height: 100px; overflow: hidden; border-top: medium none; border-right: medium none" src="http://www.facebook.com/plugins/like.php?href=<?php the_permalink() ?>&layout=standard&show_faces=true&width=450&action=like&colorscheme=light" frameborder="0" allowtransparency="allowtransparency" scrolling="no"></iframe>
5. Update the file.
6. Next load your single.php file
7. Add the same codes under the <?php the_content(); ?> and update the file.

Here’s and example under my template:

Under my index.php file, here’s how I did it:
<?php the_content(‘+ …read more…’); ?> <? else: ?><?php the_content(‘+ …read more…’); ?><? endif; ?> <br> <iframe src="http://www.facebook.com/plugins/like.php?href=<?php the_permalink() ?>&layout=standard&show_faces=true&width=450&action=like&colorscheme=light" scrolling="no" frameborder="0" allowTransparency="true" style="border:none; overflow:hidden; width:530px; height:100px;"></iframe> <p class="PostInfo">Posted by <?php the_author() ?> in <em><?php the_category(‘, ‘) ?> | <?php edit_post_link(__(‘Edit Post’));?></em> | <?php comments_popup_link(‘<span><strong>0</strong> Comments (I ♥ Comments)</span>’, ‘<span><strong>1</strong> Comment(I ♥ Comments)</span>’, ‘<span><strong>%</strong> Comments (I ♥ Comments)</span>’); ?>

And under my single.php file, here’s how I did it:
<?php the_content(‘Read the rest of this entry »’); ?> <br><iframe src="http://www.facebook.com/plugins/like.php?href=<?php the_permalink() ?>&layout=standard&show_faces=true&width=450&action=like&colorscheme=light" scrolling="no" frameborder="0" allowTransparency="true" style="border:none; overflow:hidden; width:530px; height:100px;"></iframe> <p class="PostInfo">Posted by <?php the_author() ?> in <em><?php the_category(‘, ‘) ?> | <?php edit_post_link(__(‘Edit Post’));?></em></p>

If you have questions, I’ll try to answer them. :p