在子主题上添加功能后页面不显示

I am using Genesis framework and modern-studio-pro as a child theme. I have just copy this code

function genesis_standard_loop() {

//* Use old loop hook structure if not supporting HTML5
if ( ! genesis_html5() ) {
    genesis_legacy_loop();
    return;
}

if ( have_posts() ) :

    do_action( 'genesis_before_while' );
    while ( have_posts() ) : the_post();

        do_action( 'genesis_before_entry' );

        printf( '<article %s>', genesis_attr( 'entry' ) );

            do_action( 'genesis_entry_header' );

            do_action( 'genesis_before_entry_content' );

            printf( '<div %s>', genesis_attr( 'entry-content' ) );
            do_action( 'genesis_entry_content' );
            echo '</div>';

            do_action( 'genesis_after_entry_content' );

            do_action( 'genesis_entry_footer' );

        echo '</article>';

        do_action( 'genesis_after_entry' );

    endwhile; //* end of one post
    do_action( 'genesis_after_endwhile' );

else : //* if no posts exist
    do_action( 'genesis_loop_else' );
endif; //* end loop

}

from Genesis to child theme functions.php. After that my site is showing

Fatal error: Cannot redeclare genesis_standard_loop() (previously declared in /home/u282646374/public_html/wp-content/themes/modern-studio-pro/functions.php:198) in /home/u282646374/public_html/wp-content/themes/genesis/lib/structure/loops.php on line 115

I have delete that code from child theme but site not showing. Please tell me how can i regain my site? This is the link of my page http://andrewspalding.co.uk/

Your problem is that you are redeclaring the function genesis_standard_loop() inside functions.php of your child theme while on the main genesis theme this function is inside lib/structure/loops.php child themes will overwrite the parent theme functions if they are inside the same file that they are in the parent theme, if you want to modify a function from the parent theme you might contemplate the idea of looking for filters or actions.

If you MUST redeclare the function try recreating the same file structure, but remember to add all of the other functions inside that particular file.