Create pages from plugin - easy one

dc_create_start_pages.php

<?php
/*
* Plugin Name: Easy Create Page from plugin
* Description: Delete and Add - pages, posts
* Version: 0.0.1
*
* https://developer.wordpress.org/reference/functions/wp_delete_post/
*/

defined( 'ABSPATH' ) or die( 'No script kiddies please!' );


add_action('admin_init', 'dc_create_start_pages', 10, 2);

function dc_create_start_pages($user_id, $page_id){

	global $my_admin_page;
	// Find and delete the WP default 'Sample Page'
	$defaultPage = get_page_by_title( 'Sample Page' );
	wp_delete_post( $defaultPage->ID );

	$blog_posts = post_exists('A new Post');
	$screen = get_current_screen();

	// Add multiple pages
	$args = array(
		array(
			'post_title' => 'A new Post',
			'post_content' => 'A This is new post',
			'post_status' => 'publish'
		),
		array(
			'post_title' => 'B new Post',
			'post_content' => 'B is new post',
			'post_status' => 'publish'
		),
		array(
			'post_title' => 'C new Post',
			'post_content' => 'C is new post',
			'post_status' => 'publish'
		),
		array(
			'post_title' => 'Startseite',
			'post_content' => 'This is start seite',
			'post_status' => 'publish',
			'post_type' => 'page'
		),
	);

	if (!$blog_posts) {
		foreach ( $args as $arg ) {
			wp_insert_post( $arg ); // Set to False if you want to send them to Trash.
		}
	}
	else {
		echo "<script>alert('We created pages already - be careful next time boy, oh boy.');</script>";
	}

}