WPDEVTECHSUPPORT

In this tutorial I will be teaching you on how to create a page for your WordPress plugin or WordPress theme in the Appearance Main Menu on WordPress dashboard using add_theme_page() function.

add_theme_page() function is one of the WordPress functions used to add submenu page to Appearance main menu and this can achieved with the help of the the parameters defined below;

add_theme_page( string $page_title, string $menu_title, string $capability, string $menu_slug, callable $function = ”, int $position = null )

Parameters

$page_title – (string) (Required) The text to be displayed in the title tags of your page.

$menu_title – (string) (Required) The text that will be displayed in appearance submenu. Usually this can be your plugin or theme name.

$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 and should be unique. This slug show up in the browser URL of your page.

$function – (callable) (Optional) The function to be called to output the content for this page. In our example below our function is show_my_theme_page().

$position – (int) (Optional) The position in the menu order this item should appear. Default value: null. In our example the position is set to 5.

Now we have to create a function called add_test_theme_page() function and inside this function we have to define add_theme_page functions with its parameters as specified below;

function add_test_theme_page() {
    add_theme_page( 'My Theme Name in Title Tag', 'Theme Name Here', 'edit_theme_options', 'my-theme-page-name-in-browser-url', 'show_my_theme_page' , 5);
}
add_action( 'admin_menu', 'add_test_theme_page' );

show_my_theme_page() function will output the HTML content that will be displayed on the page.

function show_my_theme_page() {
    echo "<br>";
    echo '<h1>My Theme Name Here</h1>';
    echo "<br>";
    echo '<p>This is my Theme page on WordPress Dashboard.</p>';
}