Adding the custom page with add_menu_page function on Wordpress - php

Question

I am using the add_menu_page function on WordPress; this is the code;
function my_admin_menu() {
add_menu_page( 'My Top Level Menu Example', 'Top Level Menu',
'manage_options', 'example.php', 'myplguin_admin_page', 'dashicons-tickets', 6 );
}
example.php
function display_text() {
echo 'Welcome to my page';
}
I get the menu in the dashboard, but the issue has content on the page. I can click the top-level option page from the dashboard, but once I do that, I get an empty page where it should say 'Welcome To My page'. Any ideas on how to get my content to show?

Answer 1

You were using a wrong function name that is why it was showing a blank page.
function my_admin_menu() {
add_menu_page( 'My Top Level Menu Example', 'Top Level Menu', 'manage_options', 'example.php', 'myplguin_admin_page', 'dashicons-tickets', 6 );
}
function myplguin_admin_page(){
echo 'Welcome to admin page';
}

Answer 2

You can try this code, because i use this and work
add_menu_page(
'Import Resi', // Page Title
'Import Resi', // Menu Title
'manage_options', // Capabiliy
'import_php/index.php', // Menu_slug
'', // function
'', // icon_url
6 // position
);
add_menu_page(
'Admin Cek', // Page Title
'Admin Cek', // Menu Title
'manage_options', // Capabiliy
'admin_cek/index.php', // Menu_slug
'', // function
'', // icon_url
7 // position
);

Answer 3

you need to use the correct function name and a more appropriate identifier than example.php. you can require your file from the called function
function my_admin_menu() {
add_menu_page( 'My Top Level Menu Example', 'Top Level Menu', 'manage_options', 'example', 'display_text', 'need a uri to your image here!!', 6 );
}
function display_text(){
require_once 'pathtofile.php'; //--> make sure you read up on paths and require to find your file.
}