plugins - admin_notices show after load completed

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This is my code:

class App 
{
    
    public function run()
    {
        add_action('admin_menu', [$this, 'menu']);
        add_action('admin_notices', [$this, 'pip']);
    }

    public function menu()
    {
        echo 0;

        add_submenu_page(
            'tools.php',
            __('Tools', 'name-plugin'),
            __('Name', 'name-plugin'),
            'manage_options',
            'name-plugin',
            [$this, 'show']
        );
    }

    public function show()
    {
        echo 1;
    }

    public function pip() {
        echo 2;
    }
}

This code printed 021

But I want to print 012

Note: I want to put all add_action in run method

I used priority too, but it's not work:

add_action('admin_menu', [$this, 'menu'], 1);
add_action('admin_notices', [$this, 'pip'], 2);

If I put admin_notices in show method, this code works fine.

But I don't want put it in show method

This is my code:

class App 
{
    
    public function run()
    {
        add_action('admin_menu', [$this, 'menu']);
        add_action('admin_notices', [$this, 'pip']);
    }

    public function menu()
    {
        echo 0;

        add_submenu_page(
            'tools.php',
            __('Tools', 'name-plugin'),
            __('Name', 'name-plugin'),
            'manage_options',
            'name-plugin',
            [$this, 'show']
        );
    }

    public function show()
    {
        echo 1;
    }

    public function pip() {
        echo 2;
    }
}

This code printed 021

But I want to print 012

Note: I want to put all add_action in run method

I used priority too, but it's not work:

add_action('admin_menu', [$this, 'menu'], 1);
add_action('admin_notices', [$this, 'pip'], 2);

If I put admin_notices in show method, this code works fine.

But I don't want put it in show method

• plugins
• php
• plugin-development

Share Improve this question asked Sep 13, 2021 at 8:23 user212402user212402 1 11

• 1 I don't see anything wrong with seeing 021. I don't know why you'd expect anything different. Admin notices display at the top of the page. That's normal. – Jacob Peattie Commented Sep 13, 2021 at 8:45
• Are you asking how to reposition the notices? – Jacob Peattie Commented Sep 13, 2021 at 8:47
• @JacobPeattie no. I want to show errors from show method. But admin_notices run before show method and my error not showing – user212402 Commented Sep 13, 2021 at 8:52
• Are you using the Settings API or something custom? Generally if you have a form in show(), the code that handles submission of that form should be in a separate function that's hooked earlier. Then it can pass any errors to the notices hook. – Jacob Peattie Commented Sep 13, 2021 at 8:54
• 1 admin notices aren't just echoing out text on the admin_notices hook, they have specific HTML that's needed – Tom J Nowell ♦ Commented Sep 13, 2021 at 9:36

 |  Show 6 more comments

1 Answer 1

Sorted by: Reset to default 0

Those are not admin notices. It's not enough to echo text on the admin_notices hook, it needs to be wrapped in specific HTML.

Here is an example taken from the official WP doc for admin_notices:

function sample_admin_notice__success() {
    ?>
    <div class="notice notice-success is-dismissible">
        <p><?php _e( 'Done!', 'sample-text-domain' ); ?></p>
    </div>
    <?php
}
add_action( 'admin_notices', 'sample_admin_notice__success' );

If you need to add notices after the hook has fired, use the same HTML structure and WordPress will move it using javascript to the correct place

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