How Create a page by WordPress in Using Php

page_if_else.php

<?php get_header(); ?>
	<section id="inner-headline">
	<div class="container">
        <div class="col-md-12">
            <?php if(have_posts()) : ?> 
					<?php while(have_posts()) : the_post(); ?>
            
                    <h2><?php the_title(); ?></h2>
                        <?php the_content(); ?>
            
            <?php endwhile; ?>
            
            <?php else: ?>

              <h2>404 not Found!</h2>
            
            <?php endif; ?>
        
            
            
        </div>
		
	</div>
	</section>
	<?php get_footer(); ?>