How can I add the facebook like button inside my single.php in wordpress without any plugin

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If this question is not appropriate for the site I am sorry. In my wordpress site I want to add facebook like button with dynamic permalink in the single.php file but without any plugin. In other words i want to add like button after the post when the single post is open via single.php file. Any kind of help or suggestion is appreciated. Thanks.

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3 comments

  1. In your single.php file inside the loop

    <?php if (have_posts()) : while (have_posts()) : the_post(); ?>
....
<?php the_content(); ?>
<iframe src="http://www.facebook.com/plugins/like.php?href=<?php the_permalink() ?>&amp;send=false&amp;layout=button_count&amp;width=85&amp;show_faces=false&amp;action=like&amp;colorscheme=light&amp;font=arial&amp;height=21" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:85px; height:21px;" allowTransparency="true"></iframe>
<?php endwhile; ?>
<?php endif; ?>

    You can read this.

  3. You can add this below code into functions.php. 

          function setFacebookLike($content) {
  global $post;
      if($post->post_type=="post") {

          $content.= '<iframe src="http://www.facebook.com/plugins/like.php?href='.get_permalink($post->ID).'&amp;send=false&amp;layout=button_count&amp;width=85&amp;show_faces=false&amp;action=like&amp;colorscheme=light&amp;font=arial&amp;height=21" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:85px; height:21px;" allowTransparency="true"></iframe>';
      }
      return $content;
  }
  add_filter ('the_content', 'setFacebookLike');