How do I hide the current page's title?

Question

I have this code:

add_filter( 'the_title', function() {
    return "";
});

Or, respecting the hook's arguments:

function remove_title( $title, $id ) {
    $title = '';
    return $title;
}

add_filter( 'the_title', 'remove_title', 999, 2);

Which is being placed in a custom made page, my template (used by that page) being:

get_header(); ?>

<div id="primary" class="content-area">
    <main id="main" class="site-main">
        <header class="entry-header">
            <?php the_title('<h1 class="entry-title">', '</h1>'); ?>
        </header><!-- .entry-header -->
        <?php
        while ( have_posts() ) :
            the_post();
            ?>
            <article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
                <?php
                    the_content();
                ?>
            </article><!-- #post-<?php the_ID(); ?> -->
        <?php
        endwhile; ?>
    </main><!-- #main -->
</div><!-- #primary -->
<?php
get_footer();

Answer 1

You can try this

function wpb_hidetitle_class($classes) {

    if ( is_single() || is_page() ) : 
        $classes[] = 'hidetitle';
        return $classes;
    endif;

    return $classes;

}

add_filter('post_class', 'wpb_hidetitle_class');

CSS code :

.hidetitle .entry-title { 
    display : none;
}

Source http://www.wpbeginner.com/plugins/how-to-hide-post-and-page-titles-in-wordpress-single-pages/