Wordpress：在单个自定义帖子类型页面上提交帖子方法表单返回404

Question

I'm now developing on a Wordpress theme.

I have a custom post type named activity:

register_post_type($class::$post_type, array(
    'label' => $class::$post_type_name,
    'description' => $class::$post_type_description,
// ....

And I'm editing the single-activity.php template, I have a form on it:

<form id="form_main" method="post" action="">
    <?php wp_nonce_field(); ?>
    <!-- Other fields -->
</form>

When I open the url http://localhost/activity/slug/, the page goes well.

But when I submit the form, i.e. request the url with a post method, it was causing a 404 response, the url is just simply the same.

What could be the matter?

Answer 1

After a long period of debugging, I found the reason: the $_POST fields affects the query.

In my case, I submit a field with key and values:

$_POST['title'] = 'new title';

I intend to create a new post with this title.

But in fact, the default query use this field as a where condition to filter the current page, and finally got no results.

So, when posting data, BE AWARE of the reserved field names:

like:

• s
• p
• title
• page

For more, check about the document.