The first step is to create a top level admin page with the add_menu_page() function.
add_action( 'admin_menu', 'my_admin_menu' );
function my_admin_menu() {
add_menu_page( 'My Top Level Menu Example', 'Top Level Menu', 'manage_options', 'subscribe-plugin/subscribe-plugin-admin-page.php', 'subscribe-plugin_admin_page', 'dashboard-tickets', 6 );
}
The function takes seven arguments.
$page_title
(string) (Required) The text to be displayed in the title tags of the page when the menu is selected.
$menu_title
(string) (Required) The text to be used for the menu.
$capability
(string) (Required) The capability required for this menu to be displayed to the user.
$menu_slug
(string) (Required) The slug name to refer to this menu by. Should be unique for this menu page and only include lowercase alphanumeric, dashes, and underscores characters to be compatible with sanitize_key().
$function
(callable) (Optional) The function to be called to output the content for this page.
Default value: ''
$icon_url
(string) (Optional) The URL to the icon to be used for this menu.
* Pass a base64-encoded SVG using a data URI, which will be colored to match the color scheme. This should begin with 'data:image/svg+xml;base64,'.
* Pass the name of a Dashicons helper class to use a font icon, e.g. 'dashicons-chart-pie'.
* Pass 'none' to leave div.wp-menu-image empty so an icon can be added via CSS.
Default value: ''
$position
(int) (Optional) The position in the menu order this one should appear.
Default value: null
The next step is to create page content. All you need to do is create the function defined in argument five and echo your form.
function subscribe-plugin_admin_page(){
?>
<div class="wrap">
<h2>Welcome To My Plugin</h2>
//Your form here
</div>
<?php
}
Example admin page URL with extra query args:
$query_args = array( 'page' => 'your-plugin-page', 'do' => 'edit' );
echo add_query_arg( $query_args, admin_url( 'subscribe-plugin/subscribe-plugin-admin-page.php' ) );