Having trouble with custom post type / meta box

Question

I've been working on a custom post type meta-box implementation that allows me to change the post_date to match the value in my "date" meta-box.

The function works perfectly except when I try to add a new custom post, I receive a blank page! I know it's this function because if I remove it, I can create a new post no problem.

Here is my function:

function cfc_reset_postdate( $data ) {
 // If it is our form has not been submitted, so we dont want to do anything
if(defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) return;

if($data['post_type'] == 'scripture-memory') {
    $date = $_POST['cfc_date'];
    $date = DateTime::createFromFormat('D - M j, Y', $date);
    $date = $date->format('Y-m-d');

    $data['post_date'] = $date;
    return $data;
}
}

add_filter( 'wp_insert_post_data', 'cfc_reset_postdate', '99', 1);

Any ideas on why I'm receiving a blank page when trying to create a new post?

EDIT:

I've changed my code to reflect your ideas:

function cfc_reset_postdate( $data ) {

//if($data['post_type'] == 'scripture-memory') {
    if($_POST['cfc_date'] != '') {
        $date = $_POST['cfc_date'];
        $date = DateTime::createFromFormat('D - M j, Y', $date);
        $date = $date->format('Y-m-d');

        $data['post_date'] = $date;
        return $data;
    }

//}

}

add_filter( 'wp_insert_post_data', 'cfc_reset_postdate', '99', 1);

Only problem is when I create a new post, it only allows me to create a draft, and then it comes up with a blank page that says "Are you sure you want to do that?"

I'm going to work on this more, it looks like we're making progress. Thanks everybody for your help!

Answer 1

Awesome - I got it working!

Thanks everybody for your help and comments. Turns out the function had a problem because it was taking the $data in, but never returning it, because I had "return $data" in my if statement!

Another problem was with the "WPSearch 2" plugin", it was breaking my "New Post" functionality - strange :(

Here is the completed correct function:

function cfc_reset_postdate( $data ) {
    if($data['ID']) { $postarr['ID'] = $data['ID']; }

    if($data['post_type'] == 'scripture-memory') {
        if($_POST['cfc_date']) {
            $date = $_POST['cfc_date'];
            $date = DateTime::createFromFormat('D - M j, Y', $date);
            $date = $date->format('Y-m-d');

            $data['post_date'] = $date;

        }
    }
    return $data;
}

add_filter( 'wp_insert_post_data', 'cfc_reset_postdate', '99', 1);

Hope this function helps anybody who wants to change the post_date with a custom meta-box date.