I have 7 meta fields for a custom post type in Wordpress. These 7 in particular are days of the week (Sunday thru Saturday) and have checkboxes for each. I've successfully gotten the checkbox to POST when the value is "On", however when I return to the edit page and try to deselect, the value stays the same in the database.

Here is what I have for each item input:

 <li><input type="checkbox" name="sunday" <?php if( $meta_sunday == true ) { ?>checked="checked"<?php } ?>" /> Sunday<br /></li>

And my update lines:

    return $post;
    update_post_meta($post->ID, "sunday", $_POST["sunday"] );
  • If I'm not mistaken, an unchecked checkbox is not set in $_POST. You'd have to empty the meta for the checkboxes that are not set.
    – Shane
    Feb 7, 2012 at 17:00

3 Answers 3


It appears the post meta is not being cleared for 'sunday' when the checkbox is unchecked.

If( isset($_POST['sunday']) ){
    update_post_meta($post->ID, "sunday", $_POST["sunday"] );
    delete_post_meta($post->ID, "sunday");
return $post;

Or you can set the value to false

If( isset($_POST['sunday']) ){
    update_post_meta($post->ID, "sunday", true );
    update_post_meta($post->ID, "sunday", false );
return $post;
  • Just consolidating your code a little, update_post_meta($post->ID, "sunday", isset($_POST['sunday']) ); Feb 7, 2012 at 22:14
  • Thanks @MatthewBoynes and Ryan Meier - this worked perfect
    – javy
    Feb 8, 2012 at 14:37

Unchecked checkboxes are not set in the $_POST, so you'd have to empty their meta field.

Something like this should work :

 $sunday = ( isset( $_POST['sunday'] ) ) ? $_POST['sunday'] : "";
 update_post_meta( $post->ID, 'sunday', $sunday );

Unchecked checkboxes are not set in the $_POST, they are set in $_REQUEST, you can set checkbox value of custom post type like this:

if ( isset( $_REQUEST['inprint'] ) ) {
   update_post_meta($post_id, '_inprint', TRUE);
 } else {
   update_post_meta($post_id, '_inprint', FALSE);

and get checkbox value like this:

global $post;

$inprint= get_post_meta($post->ID, '_inprint', true);

<input type="checkbox" name="inprint" value='1'<?php checked(1, $inprint); ?> />

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