5ally/cookie-solution.php Secret

## cookie-solution.php
<?php
function onepage() {
	//... your code
}


//**PAGEBREAK SECTION - BEG**//
function pagebreak( $args = '' ) {
	//... your code
}

/**
 * Replace [nextpage] with <!--nextpage--> through the 'the_posts' filter.
 *
 * @see http://wordpress.stackexchange.com/a/183980/26350
 */

! is_admin() && add_filter( 'the_posts', function( $posts )
{
	//... your code
});
//**PAGEBREAK SECTION - END**//


add_action( 'init', 'set_check_content_cookie', 0 );
function set_check_content_cookie() {
	if ( is_admin() ) {
		return;
	}

	$is_multipage = false;
	// If the query string "content" is not set, check if the "content" cookie value is exactly "multipage".
	if ( ! isset( $_GET['content'] ) && isset( $_COOKIE['content'] ) && 'multipage' === $_COOKIE['content'] ) {
		$is_multipage = true;
	}
	// If the query string "content" is set and its value is "multipage", set the cookie.
	elseif ( isset( $_GET['content'] ) && 'multipage' === $_GET['content'] ) {
		setcookie( 'content', 'multipage', time()+3600, COOKIEPATH, COOKIE_DOMAIN );
		$is_multipage = true;
	}

	// Hook onepage() to `wp`, if applicable.
	if ( ! $is_multipage ) {
		add_action( 'wp', 'onepage' );
	}
}

## non-cookie-solution.php
<?php
function onepage() {
	//... your code
}


//**PAGEBREAK SECTION - BEG**//
function pagebreak( $args = '' ) {
	//... your code
}

/**
 * Replace [nextpage] with <!--nextpage--> through the 'the_posts' filter.
 *
 * @see http://wordpress.stackexchange.com/a/183980/26350
 */

! is_admin() && add_filter( 'the_posts', function( $posts )
{
	//... your code
});
//**PAGEBREAK SECTION - END**//


add_filter( 'page_link', 'add_content_query_string' );                 // for Page URLs
add_filter( 'attachment_link', 'add_content_query_string' );           // for Attachment URLs
add_filter( 'post_type_link', 'add_content_query_string' );            // for CPT URLs
add_filter( 'post_link', 'add_content_query_string' );                 // for Post URLs
add_filter( 'year_link', 'add_content_query_string' );                 // for yearly archive URLs
add_filter( 'month_link', 'add_content_query_string' );                // for monthly archive URLs
add_filter( 'day_link', 'add_content_query_string' );                  // for daily archive URLs
add_filter( 'search_link', 'add_content_query_string' );               // for search URLs
add_filter( 'post_type_archive_link', 'add_content_query_string' );    // for CPT archive URLs
add_filter( 'get_pagenum_link', 'add_content_query_string' );          // for pagination URLs
add_filter( 'get_comments_pagenum_link', 'add_content_query_string' ); // for pagination URLs
add_filter( 'term_link', 'add_content_query_string' );                 // for term URLs
function add_content_query_string( $url ) {
	if ( ! is_admin() && (
		isset( $_GET['content'] ) && 'multipage' === $_GET['content']
	) ) {
		$url = add_query_arg( 'content', 'multipage', $url );
	}
	return $url;
}

add_filter( 'wp_link_pages_link', 'fix_content_query_string', 10, 2 );
function fix_content_query_string( $link, $n ) {
	return str_replace( "/?content=multipage/$n/",
		"/$n/?content=multipage", $link );
}

add_action( 'init', function(){
	// Hook onepage() to `wp`, if applicable.
	if ( empty( $_GET['content'] ) || 'multipage' !== $_GET['content'] ) {
		add_action( 'wp', 'onepage' );
	}
}, 0 );

// Note that extra coding is needed (but not included here) to fix the issue
// with multi-page URLs/requests.