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<?php

add_filter( 'request', function ( $query_vars ) {
	if ( isset( $query_vars['pagename'] ) && $query_vars['pagename'] === 'all-articles' ) {
		add_filter( "pre_option_page_for_posts", function () {
			return 484; // ID нужной страницы
		} );
	}

	return $query_vars;
} );