Wordpress: custom field display twice

I have a little bug on my WordPress...

When I added a custom field, I have no ajax, I need to saved the draft or publi开发者_高级运维sh to see the update.

And after I saved my post, the custom field display twice.

name :   Steffi

name :   Steffi

Help, please ! Thanks

---

I think you only need to change the php variable in this sample code:

<?php
    $cf_video = 'video_code';
    $video_meta = get_post_meta($post->ID, $cf_video, true);

    echo ($video_meta);
?>

there are more about this in http://monstertut.com/2012/06/wordpress-custom-field-template/

---

Hey guys, I found THE solution.

Problems :

• Custom field display twice.

• No Ajax/jQuery visual feedback.

If you've been working on the file function.php, make sure you remove extra line breaks.

Particularly at the top and the bottom of your file... If you have some line breaks, your xml got an error : XML or text declaration not at start of entity

---

I know this is an old question, but hopefully this will help someone else with this issue.

I personally found that removing the closing php tag (?>) from the end of my functions.php file resolved this issue.