/functions.php

<?php



	/*

	

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	Notes:

	----------------------------------------

	

	future

	to-do: http://gridster.net/ - build virtual templates via UI (fork coming soon)

			- http://jsfiddle.net/maxgalbu/UfyjW/

			- https://github.com/ducksboard/gridster.js/issues/69

			- http://headwaythemes.com/features/headway-grid/

			- http://www.webresourcesdepot.com/grid-builder-drag-n-drop-html-grid-generator/

			- http://app.responsify.it/

			- https://www.scrollkit.com/

			- http://mcpants.github.io/jquery.shapeshift/index.html

	to-do: bundle xml file import for WordPress (use wordpress import/export feature) - theme unit test installer?

	to-do: perhaps move to: http://wordpress.org/extend/plugins/option-tree/ for options?

			- 	to-do: pre-configured site settings (so buddypress, multi site, multi author, client etc)

	to-do: a second take on responsive tables -> http://filamentgroup.com/examples/rwd-table-patterns/ / http://consulenza-web.com/jquery/MediaTable/?

			-  http://css-tricks.com/responsive-data-table-roundup/ - more options for responsive tables

	to-do: font effects? https://developers.google.com/webfonts/docs/getting_started#Effects - shortcode?

	to-do: explore the gantry-framework http://www.gantry-framework.org/download

	to-do: ability to disable built in post types and taxonomies - http://core.trac.wordpress.org/ticket/14761

	to-do: move to an existing CSS/LESS framework?

			- clean up gravity forms less and test with some forms (not using GF much)

			- a beautiful, minimal, responsive design (old scott.ee site?)

			- http://typeplate.com/ 

			- https://github.com/clearleft/clearless

			- http://twitter.github.com/bootstrap/ also http://bootswatch.com/

			- http://responsablecss.com/ - baseline is not calculated

			- http://mateuszkocz.github.com/3l - seo helper is rather nifty

			- http://compass-style.org/reference/compass/css3/ - less mixin ideas from compass

			- https://github.com/dancrew32/lesslib/blob/master/mixins.less - less mixins

			- http://kushagragour.in/lab/hint/ - css tooltips 

			- http://necolas.github.com/normalize.css/ - use normalize instead of full reset

			- investigate this grid system: https://t.co/GaP9MWsZtS

			- http://coding.smashingmagazine.com/2013/03/08/tips-tricks-print-style-sheets/ - improve print styles

			- http://gumbyframework.com/

			- http://www.99lime.com/elements/

			- http://www.formee.org/

			- http://simplegrid.info/

			- http://www.responsivegridsystem.com/

			- http://getpreboot.com/

			- http://www.fitgrd.com/

			- http://www.getuikit.com/

			- https://github.com/mojotech/jeet

	to-do: replace modernizr? http://conditionizr.com/

	to-do: live bind shortcode JS for instant search plugin compatibility - livequery? or .on

	to-do: compatibilty with live edit - http://wordpress.org/extend/plugins/live-edit/

			- if (function_exists("live_edit")) { live_edit(apply_filters('null_live_edit_loop', 'post_title, post_excerpt')); }

	to-do: HiDPI/vector icon post type icons - ready for 3.7 and MP6

	to-do: create an editable 404?

	to-do: feature tooltips restricted by user type (same code as with admin bar)

	to-do: improve gallery shortcode - css and filters tweaks - see chailey - make the built in gallery useful in more projects //http://wordpress.stackexchange.com/questions/4343/how-to-customise-the-output-of-the-wp-image-gallery-shortcode-from-a-plugin

	to-do: remove htaccess gubbins in favour of : https://github.com/roots/wp-h5bp-htaccess/

	

	ongoing

	to-do: update language files

	to-do: update modernizr

	to-do: update ligature symbols

	to-do: update less compiler 0.3.9+ / less plugin and grid - hopefully will work again and provide css compression

	to-do: update acf

	to-do: test against the theme guide: http://developer.wordpress.com/themes/

	to-do: theme options framework



	soon

	to-do: cache 

			- (transients) null_get_extensions?

			- cache any wp-query and custom query?

	to-do: filter folder locations for extensions (a plugin could register extension folders?)

	to-do: Turn on certain extensions by default (child theme ships with X,Y,Z on)

	to-do: improve nav walker to provide better classes and support for other attributes

	to-do: issue - all templates that exist in the parent theme are a pain - if i just want index.php in child theme I have to overwrite category, tag etc etc - move all these to null child?

		- 	to-do: style and code for various post format types (chat, video, quote etc)

		- 	to-do: home.php

	to-do: Performance for htaccess? http://wp.tutsplus.com/tutorials/hosting/optimizing-wordpress-loading-speed-with-header-php-htaccess/

	to-do: please make sure your htaccess is writable notice on activation?	

	to-do: navigation fix for cpt - see MHP

	to-do: remove more polyfills 

			- webp images? - http://webpjs.appspot.com/ - https://developers.google.com/speed/webp/

			- One tool based on jQuery and modernizr - http://afarkas.github.io/webshim/demos/index.html

			- http://elclanrs.github.io/jq-idealforms/

			- https://github.com/louisremi/jquery-smartresize

	to-do: customise: https://github.com/devinsays/options-framework-theme/commit/476b24bd24b1f6392a793122e47366a4d3cd9eef

	to-do: https://github.com/mboynes/super-cpt

	to-do: beef up our mixins http://lesselements.com/ - https://github.com/drublic/less-mixins

	to-do: update IE8 pinned info http://www.buildmypinnedsite.com/en

	to-do: option to remove http://aahacreative.com/2013/08/05/remove-jquery-migrate-wordpress-36/

	to-do: http://wptheming.com/2013/11/optimizing-responsive-layouts/

	to-do: http://lessphp.gpeasy.com/ - move to this?

	*/



	// load the options framework

	if (!function_exists( 'optionsframework_init' )) {

		define('OPTIONS_FRAMEWORK', get_template_directory() . '/assets/inc/options-framework/');

		define('OPTIONS_FRAMEWORK_DIRECTORY', get_template_directory_uri() . '/assets/inc/options-framework/');		

		load_template(OPTIONS_FRAMEWORK . 'options-framework.php');

		load_template(get_template_directory() . '/options.php'); // temporary fix for options framework & theme customiser http://wptheming.com/2012/07/options-framework-theme-customizer/

	}

	

	// set PHP timezone from WordPress settings

	if ($timezone = get_option('timezone_string')) date_default_timezone_set($timezone);

		

	// force WordPress rewrite if option set

	if (of_get_option('force_rewrite', '0')) add_filter('got_rewrite', '__return_true');

	

	// parse template info from style.css - version number

	$theme_data = wp_get_theme();

	define('NULL_VERSION', $theme_data['Version']);



	// get the theme name from the stylesheet (lowercase and without spaces)

	$themename = $theme_data['Name'];

	$themename = preg_replace("/\W/", "", strtolower($themename));

	define('NULL_OPTION_NAME', $themename);



	// cache bust based on options settings and file gen time of main css - filterable for child themes to add different css filemtime

	$type = (of_get_option('disable_less', '1') ? 'css' : 'less');	

	$cachefiles = intval(filemtime(get_template_directory() . '/assets/'.$type.'/screen.'.$type));

	$cacheoptions = md5(serialize(get_option(NULL_OPTION_NAME, array('0' => '1'))));

	$cacheoptions = intval($cacheoptions);

	$cachebust = apply_filters('null_cache_bust', abs(intval($cacheoptions+$cachefiles)));

	define('NULL_CACHE_BUST', $cachebust);



	// load activation code

	locate_template('/assets/inc/activation.php', true, true);



	// deprecated code - do not rely on code in this file

	load_template(get_template_directory() . '/assets/inc/deprecated.php');



	// compatibility - work nicely with other popular plugins

	load_template(get_template_directory() . '/assets/inc/compatibility.php');



	// email

	load_template(get_template_directory() . '/assets/inc/email.php');

	

	// custom post types

	load_template(get_template_directory() . '/assets/inc/post-types.php');



	// widgets and sidebars

	load_template(get_template_directory() . '/assets/inc/widgets.php');



	// cron

	load_template(get_template_directory() . '/assets/inc/cron.php');

	

	// shortcodes

	load_template(get_template_directory() . '/assets/inc/shortcodes.php');

	

	// breadcrumbs - http://wordpress.org/extend/plugins/breadcrumb-trail/

	if (!is_admin()) { locate_template('/assets/inc/breadcrumbs.php', true, true); }



	// load htaccess code, rewrites etc

	if (is_admin()) { locate_template('/assets/inc/htaccess.php', true, true); }

	

	// only load in admin functions in admin interface

	if (is_admin()) { locate_template('/assets/inc/admin.php', true, true); }



	// load update code

	if (is_admin()) { load_template(get_template_directory() . '/assets/inc/update.php'); }

		

	// only load front end functions for site

	if (!is_admin()) { locate_template('/assets/inc/theme.php', true, true); }



	// load theme hook alliance - https://github.com/zamoose/themehookalliance

	load_template(get_template_directory() . '/assets/inc/thahooks.php');



	// set content width - see: http://toggl.es/wEBCFs - largely irrelevant with responsive sites.. set it to the maximum possible width

	if (!isset($content_width)) $content_width = apply_filters('null_content_width', 656);



	/***************************************************************

	* Maintenance Mode

	* Take the front end of the site down for users that are not logged in and cannot manage optionsframework

	***************************************************************/



	add_action('template_redirect', 'null_maintenance_mode');



	function null_maintenance_mode() {

		if (!is_user_logged_in() && !current_user_can('edit_theme_options') && of_get_option('maintenance_mode', '0')) { 

			header('Retry-After: 600'); // 600 seconds/10 minutes

			wp_die(__('Website is down for maintenance.', 'null'), get_bloginfo('name').' | '.__('Maintenance (503)', 'null'), array('response' => 503)); 

		}

	}



	/***************************************************************

	* Functions null_admin_bar_updates

	* Remove the updates notification from the admin bar for non admins

	***************************************************************/

	

	add_action('wp_before_admin_bar_render', 'null_admin_bar_updates', 25);

	

	function null_admin_bar_updates() {

		

		global $wp_admin_bar;



		if ((!current_user_can('update_plugins')) && (of_get_option('disable_updates', '1'))) {

			$wp_admin_bar->remove_menu('updates');

		}



	}



	/***************************************************************

	* Function null_howdy

	* Change Howdy? in the admin bar

	***************************************************************/

	

	add_filter('gettext', 'null_howdy', 10, 2 );

	

	function null_howdy($translation, $original) {

		

		if ($howdy = of_get_option('howdy')) {

			if ('Howdy, %1$s' == $original) {

				return $howdy.' %1$s';

			}

		}

		return $translation;

			

	}



	/***************************************************************

	* Function null_setup

	* Setup theme, languages, enable post thumbnail support & custom menus etc

	***************************************************************/

	

	add_action('after_setup_theme','null_setup');

	

	function null_setup() {

	

		// load language files for null framework

		load_theme_textdomain('null', get_template_directory() . '/assets/languages'); 		

 

 		// add support for custom header if setup

		if (of_get_option('custom_header', '0')) {

			add_theme_support('custom-header'); 

		}

			

		// add support for custom backgrounds if setup

		if (of_get_option('custom_background', '0')) {

			add_theme_support('custom-background');

		}

			

		// post-formats

		if (of_get_option('post_formats', '0')) {

			

			$formats = of_get_option('post_format_types', array());

			$supported = array();

			

			foreach ($formats as $key => $value) {

				if ($value == 1) $supported[] = $key;

			}



			add_theme_support('post-formats', $supported);

		}



		// add feed links for comments and posts to <head>	

		add_theme_support('automatic-feed-links');

	

		// setup thumbnail support

		add_theme_support( 'post-thumbnails' ); 



		// html5 all the things

		add_theme_support( 'html5', array( 

			'comment-list', 

			'comment-form', 

			'search-form',

			'gallery',

			'captions' 

		) );



		// add theme hook alliance support (https://github.com/zamoose/themehookalliance) - filterable by child theme 

		add_theme_support('tha_hooks', apply_filters('null_tha_hooks', array('body','head','header','content','entry','comments','sidebar','footer')));



		// set defualt thumbnail size: the_post_thumbnail();

		set_post_thumbnail_size( 150, 150, true );

		

		// custom hook to easily register more image sizes

		do_action('null_register_image_size');

	

		// custom menu support

	    add_theme_support('menus');

	    

		// register navigation menus for this theme

		register_nav_menus(apply_filters('null_register_menu', array(

	  		  'navigation' => __('Navigation', 'null'),

	  		  'footer' => __('Footer', 'null')

	  		)

	  	));

		

	}



	// load php less parser if enabled

	if (!of_get_option('disable_less', '1')) { locate_template('/assets/inc/less.php', true, true); }



	/***************************************************************

	* Function null_less_vars

	* Parse theme options into less for use in stylesheets

	***************************************************************/



	if (!of_get_option('disable_less', '0')) {

		add_filter('less_vars', 'null_less_vars', 10, 2 );

	}



	function null_less_vars($vars, $handle) {

	   	

	   	global $pagenow, $content_width;



	    // $handle is a reference to the handle used with wp_enqueue_style()

	    $vars['primarycol'] = of_get_option('primary_colour', '#141414');

		$vars['bodycol'] = of_get_option('body_colour', '#141414');

		$vars['linkcol'] = of_get_option('link_colour', '#0000EE');

		$vars['linkhovercol'] = of_get_option('link_hover_colour', '#551A8B');

		$vars['backgroundimage'] = of_get_option('background_image', get_template_directory_uri().'/assets/images/placeholder.png');

		$vars['headingfont']  = of_get_option('heading_font', 'Cabin');

	   	$vars['bodyfont'] = of_get_option('body_font', 'a1');

	   	$vars['cachebust'] = NULL_CACHE_BUST;

	   	$vars['contentwidth'] = $content_width;

	    return $vars;

	    

	}



	/***************************************************************

	* Function null_admin_css_setup

	* Register and enqueue all css/less files backend - http://toggl.es/tSgnfR

	***************************************************************/

	

	add_action('admin_enqueue_scripts', 'null_admin_css_setup');

	

	function null_admin_css_setup() {

		

		// is less compiling enabled or disabled?

		$type = (of_get_option('disable_less', '1') ? 'css' : 'less');	

		

		// custom admin css

		wp_register_style('null-admin', get_template_directory_uri() . '/assets/'.$type.'/wp-admin.'.$type, '', filemtime(get_template_directory() . '/assets/'.$type.'/wp-admin.'.$type));

		wp_enqueue_style('null-admin');



		// action for adding or removing admin css

		do_action('null_admin_css');

	

	}

	

	/***************************************************************

	* Function null_theme_css_setup

	* Register and enqueue all css/less files frontend - http://toggl.es/tSgnfR

	***************************************************************/



	add_action('wp_enqueue_scripts', 'null_theme_css_setup');

	

	function null_theme_css_setup() {

		

		// is less compiling enabled or disabled?

		$type = (of_get_option('disable_less', '1') ? 'css' : 'less');



		// register all css/less

		// grab the google font based on font settings

		$heading_font = of_get_option('heading_font', 'Cabin');

		$body_font = of_get_option('body_font', 'a1'); // arial

		$allfonts = null_get_fonts();

		$gfonts = array();

		

		if ($heading_font != '') {

			if (!null_string_search('(system)', $allfonts[$heading_font])) {

				$gfonts[] = $heading_font;

			}

		}

		

		if (!null_string_search('(system)', $allfonts[$body_font])) {

			$gfonts[] = $body_font;

		}

		

		if (!empty($gfonts)) { 

			$gfonts = array_unique($gfonts);

			$getfonts = implode('|', $gfonts);

			wp_register_style('google-font', 'http://fonts.googleapis.com/css?family='.$getfonts, '', null_slugify(NULL_VERSION), 'all'); 

			wp_enqueue_style('google-font');

		}		



		// the rest of the styles

		wp_register_style('null-screen', get_template_directory_uri() . '/assets/'.$type.'/screen.'.$type, array(), NULL_CACHE_BUST, 'screen');

		wp_register_style('holmes', get_template_directory_uri() . '/assets/css/holmes.css', array('null-screen'), NULL_CACHE_BUST, 'screen');

		wp_register_style('null-print', get_template_directory_uri() . '/assets/'.$type.'/print.'.$type, array(), NULL_CACHE_BUST, 'print');

		

		// register ie styles

		wp_register_style('null-screen-ie', get_template_directory_uri() . '/assets/'.$type.'/screen-ie.'.$type, array(), NULL_CACHE_BUST, 'screen');

		

		// all styles for this theme

		wp_enqueue_style('null-screen');



		// holmes if in development mode and holmes is set

		if (of_get_option('development_mode_holmes', '0'))	wp_enqueue_style('holmes');



		// remove admin bar css for print media - added already

		remove_action('wp_head', 'wp_admin_bar_header');

		

		// print style sheet (including admin bar hide removed above)

		wp_enqueue_style('null-print');

		

		// ie styles

		wp_enqueue_style('null-screen-ie');

		

		// action for adding or removing theme css

		do_action('null_theme_css');

		

	}



	/***************************************************************

	* Function null_login_css_setup

	* Add a custom stylesheet to the login (same CSS is also added to the admin)

	***************************************************************/

	

	add_action('login_enqueue_scripts', 'null_login_css_setup');

	

	function null_login_css_setup() {



		// is less compiling enabled or disabled?

		$type = (of_get_option('disable_less', '1') ? 'css' : 'less');

		

		// custom admin css

		wp_register_style('null-admin', get_template_directory_uri() . '/assets/'.$type.'/wp-admin.'.$type, array(), filemtime(get_template_directory() . '/assets/'.$type.'/wp-admin.'.$type));

		wp_enqueue_style('null-admin');

	   

	}



	/***************************************************************

	* Function null_admin_js_setup

	* Register and enqueue all admin javascript files

	***************************************************************/

	

	add_action('admin_enqueue_scripts', 'null_admin_js_setup');

	

	function null_admin_js_setup() {

		

		// action for adding or removing more js in the admin

		do_action('null_admin_js');

			

	}

		

	/***************************************************************

	* Function null_theme_js_setup

	* Register and enqueue all frontend javascript files

	***************************************************************/



	add_action('wp_enqueue_scripts', 'null_theme_js_setup');

	

	function null_theme_js_setup() {

		

		//  grab settings

		$polyfills = of_get_option('polyfills', array(

			'ios' 			=> "1",

			'selectivizr'	=> "0", 

			'html5_forms'	=> "1",

			'imgsizer'		=> "0"

		));

			

		// register all scripts			

		wp_register_script('modernizr', get_template_directory_uri() . '/assets/js/modernizr.js', '', filemtime(get_template_directory() . '/assets/js/modernizr.js'));

		wp_register_script('html5-forms', get_template_directory_uri() . '/assets/js/forms.js', array('jquery'), filemtime(get_template_directory() . '/assets/js/forms.js'));

		wp_register_script('null-gat', get_template_directory_uri() . '/assets/js/analytics.js', array('jquery'), filemtime(get_template_directory() . '/assets/js/analytics.js'));

		wp_register_script('null', get_template_directory_uri() . '/assets/js/onload.js', array('jquery', 'jquery-ui-tabs', 'jquery-ui-accordion'), filemtime(get_template_directory() . '/assets/js/onload.js'));



		// comment threading

		if (is_singular() && get_option('thread_comments')) wp_enqueue_script('comment-reply');

		

		// standard shipped jquery

		wp_enqueue_script('jquery');

				

		// always load modernizr as it contains HTML5 shiv

		wp_enqueue_script('modernizr');

		

		// html5 forms if option is set

		if ($polyfills['html5_forms'] == "1") wp_enqueue_script('html5-forms');

		

		// analytics event tracking

		if ((of_get_option('gat')) && (of_get_option('gat_external_download', '0'))) wp_enqueue_script('null-gat');



		// the onload/custom js file

		wp_enqueue_script('null');

		

		// action for adding or removing more js on the theme

		do_action('null_theme_js');

		

	}



	/***************************************************************

	* Function null_conditional_ie_styles

	* Add conditional comments around IE specific stylesheets

	***************************************************************/

	

	add_filter('style_loader_tag', 'null_conditional_ie_styles', 10, 2);

	

	function null_conditional_ie_styles( $tag, $handle ) {

	

		if ('null-screen-ie' == $handle || 'screen-ie' == $handle)

			$tag = '<!-- IE css -->' . "\n" .'<!--[if lt IE 9]>' . "\n" . $tag . '<![endif]-->' . "\n";

	

		return $tag;

	

	}



	/***************************************************************

	* Function null_clean_login_logout

	* Tidy up our URLs for WordPress login and WordPress logout & alter redirects

	***************************************************************/

	

	add_filter('login_url', 'null_clean_login_logout');

	add_filter('logout_url', 'null_clean_login_logout');

		

	function null_clean_login_logout($url, $redirect='') {

		

		// logout		

		if (null_string_search('logout', $url)) {

			

			if (empty($redirect) && of_get_option('logout_redirect_url')) {

				$redirect = of_get_option('logout_redirect_url');

			}

			

			if (!is_multisite() && !is_child_theme() && of_get_option('cleanup', '0')) {

				$url = str_replace('wp-login.php', 'logout/', $url);

				if (empty($redirect)) {

					$redirect = get_option('siteurl') . '/wp-login.php?loggedout=true';

				}

			}

		

		// login	

		} else {

		

			if (!is_multisite() && !is_child_theme() && of_get_option('cleanup', '0')) {

				$url = str_replace('wp-login.php', 'login/', $url);

			}

			

			if (empty($redirect) && of_get_option('login_redirect_url')) {

				$redirect = of_get_option('login_redirect_url');

			}

		}

		

		if (!empty($redirect)) {

			$url = add_query_arg('redirect_to', urlencode($redirect), $url);

		}

		

		return $url;

	}



	/***************************************************************

	* Function null_get_extensions

	* Helper function for retrieving widgets, shortcodes and post-type extensions 

	***************************************************************/

	

	function null_get_extensions($type = 'post-types', $settings = false) {

	

		switch($type) {

		

			// shortcodes

			case "shortcodes":

				

				$folder_base = trailingslashit(get_template_directory() . '/assets/inc/shortcodes');

				$folder_child = trailingslashit(get_stylesheet_directory() . '/assets/inc/shortcodes');

				$preg = '|Shortcode Name:(.*)$|mi';



				// for shortcodes we want to check a second header (shortcode template)

				$pregtemplate = '|Shortcode Template:(.*)$|mi';



			break;

			

			// widgets

			case "widgets":

	

				$folder_base = trailingslashit(get_template_directory() . '/assets/inc/widgets');

				$folder_child = trailingslashit(get_stylesheet_directory() . '/assets/inc/widgets');

				$preg = '|Widget Name:(.*)$|mi';

			

			break;

			

			// post types

			case "post-types":

			default:

	

				$folder_base = trailingslashit(get_template_directory() . '/assets/inc/post-types');

				$folder_child = trailingslashit(get_stylesheet_directory() . '/assets/inc/post-types');

				$preg = '|Post Type Name:(.*)$|mi';

				

			break;

			

		}

		

		// array to store extensions

		$extensions = array();

		

		// loop the directory and grab the extension information

		if (file_exists($folder_base)) {

			foreach(glob($folder_base . '*.php') as $file)  {  

				$data = implode('', file($file));

		

				if (preg_match($preg, $data, $name)) {

					$name = _cleanup_header_comment($name[1]);

				}

				

				// additional check for shortcodes - rip the template header out too

				if (isset($pregtemplate)) {



					if (preg_match($pregtemplate, $data, $template)) {

						$template = _cleanup_header_comment($template[1]);

					}



					if (!empty($name) && !empty($template)) {

						$extensions[] = array("name" => trim($name), "nicename" => null_slugify(trim($name)), "path" => $file, "template" => $template);

					}



				} else {



					if (!empty($name)) {

						$extensions[] = array("name" => trim($name), "nicename" => null_slugify(trim($name)), "path" => $file);

					}	

				}

			}

		}

		

		// if a child theme then do it again

		if (file_exists($folder_child) && ($folder_base != $folder_child)) {

			foreach(glob($folder_child . '*.php') as $file)  {  

				$data = implode('', file($file));

		

				if (preg_match($preg, $data, $name)) {

					$name = _cleanup_header_comment($name[1]);

				}

				

				// additional check for shortcodes - rip the template header out too

				if (isset($pregtemplate)) {



					if (preg_match($pregtemplate, $data, $template)) {

						$template = _cleanup_header_comment($template[1]);

					}



					if (!empty($name) && !empty($name)) {

						$extensions[] = array("name" => trim($name), "nicename" => null_slugify(trim($name)), "path" => $file, "template" => $template);

					}



				} else {



					if (!empty($name)) {

						$extensions[] = array("name" => trim($name), "nicename" => null_slugify(trim($name)), "path" => $file);

					}	

				}	

			}

		}

		

		// return an array of settings if set

		if ($settings) {

			

			$settings = array();

			

			foreach($extensions as $extension) {

				$settings[$extension['nicename']] = $extension['name'];

			}

			

			// sort

			ksort($settings);



			return $settings;

		}

		

		// sort

		$sorted = array();

		foreach ($extensions as $extension) {

			$sorted[] = $extension['name'];

		}

		array_multisort($sorted, SORT_ASC, $extensions);



		// return an array of extensions

		return $extensions;

	}



	/***************************************************************

	* Function null_extensions_enabled

	* Simple check to see if any extension is set to on within an extensions array

	***************************************************************/



	function null_extensions_enabled($extensions) {

		$tmp = array_filter($extensions);

		if (empty($tmp)) return false;

		return true;

	}



	/***************************************************************

	* Function null_get_fonts

	* Get System & Google Web Fonts json object and save as transient 

	***************************************************************/

	

	function null_get_fonts($sort = 'alpha')	{

		

		// sort options

		// alpha: Sort the list alphabetically

		// date: Sort the list by date added (most recent font added or updated first)

		// popularity: Sort the list by popularity (most popular family first)

		// style: Sort the list by number of styles available (family with most styles first)

		// trending: Sort the list by families seeing growth in usage (family seeing the most growth first)

		

		if (false === ($font_list = get_transient('null_google_fonts_'.$sort))) { 

			

			// system fonts - the stacks are available in mixins.less and simple array references are used for compatibility with LESS guards

			$font_list['a1'] = 'Arial (system)';

			$font_list['a2'] = 'Arial Rounded (system)'; 

			$font_list['b1'] = 'Baskerville (system)';

			$font_list['c1'] = 'Cambria (system)';

			$font_list['c2'] = 'Centry Gothic (system)';

			$font_list['c3'] = 'Courier New (system)';

			$font_list['g1'] = 'Georgia (system)';

			$font_list['h1'] = 'Helvetica (system)';

			$font_list['l1'] = 'Lucida Bright (system)';

			$font_list['l2'] = 'Lucida Sans (system)';

			$font_list['t1'] = 'Tahoma (system)';

			$font_list['t2'] = 'Trebuchet MS (system)';

			$font_list['v1'] = 'Verdana (system)';

						

			// google fonts

			$api_key = 'AIzaSyCTTbK5s0or8LmQfUCNhndMfSvyz-f6jqk';

			$gwf_uri = "https://www.googleapis.com/webfonts/v1/webfonts?key=" . $api_key . "&sort=" . $sort;

			$raw = wp_remote_get( $gwf_uri );



			// if an error is detected then fail

			if ( is_wp_error( $raw ) ) { return false; }



			$fonts = json_decode($raw['body']);

						

			foreach ($fonts->items as $font) {

				$font_list[$font->family] = $font->family;

			}



			// cache for 3 days

			set_transient('null_google_fonts_' . $sort, $font_list, 60 * 60 * 24 * 3);

		

		}

		

		// return the saved list of Google Web Fonts

		return $font_list;

	

	}	



	/***************************************************************

	* Function null_of_font_faces

	* Add Google fonts to the options framework typogrpahy choice

	***************************************************************/



	add_filter( 'of_recognized_font_faces', 'null_of_font_faces' );



	function null_of_font_faces($faces) {



		$extra_fonts = null_get_fonts();

		// remove system fonts from the list (a bit of a bug - ideally function above would have sensible array keys but it does not due to LESS issues)

		unset($extra_fonts['a1'], $extra_fonts['a2'], $extra_fonts['b1'], $extra_fonts['c1'], $extra_fonts['c2'], $extra_fonts['c3'], $extra_fonts['g1'], $extra_fonts['h1'], $extra_fonts['l1'], $extra_fonts['l2'], $extra_fonts['t1'], $extra_fonts['t2'], $extra_fonts['v1']);

	    return array_merge($faces, $extra_fonts);



	}



	/***************************************************************

	* Function null_cache_path

	* Return the path to the null-cache directory in /uploads/

	***************************************************************/

	

	function null_cache_path() {

			

		$upload_dir = wp_upload_dir();

		$dir = apply_filters('null_cache_path', trailingslashit( $upload_dir[ 'basedir' ] ) . 'null-cache');

						

		// create folder if it doesn't exist yet

		if (!file_exists($dir))

			wp_mkdir_p($dir);

			

		return rtrim($dir, '/');

	}



	/***************************************************************

	* Function optionsframework_option_name

	* Determine a unique name for the theme options settings in database

	***************************************************************/

	

	function optionsframework_option_name() {		

		$optionsframework_settings = get_option('optionsframework');

		$optionsframework_settings['id'] = NULL_OPTION_NAME;

		update_option('optionsframework', $optionsframework_settings);

	}



	/***************************************************************

	* Function is_wp_version

	* What version of WordPress are we running?

	***************************************************************/

	

	if (!function_exists('is_wp_version')) {

		function is_wp_version( $is_ver ) {

		    $wp_ver = explode( '.', get_bloginfo( 'version' ) );

		    $is_ver = explode( '.', $is_ver );

		    for( $i=0; $i<=count( $is_ver ); $i++ )

		        if( !isset( $wp_ver[$i] ) ) array_push( $wp_ver, 0 );

		    foreach( $is_ver as $i => $is_val )

		        if( $wp_ver[$i] < $is_val ) return false;

		    return true;

		}

	}



	/***************************************************************

	* Function current_url

	* Determine the URL of the currently viewed page - will return array if $parse set to true

	***************************************************************/



	if (!function_exists('current_url')) {

		function current_url($parse = false) {

			$s = empty($_SERVER['HTTPS']) ? '' : ($_SERVER['HTTPS'] == 'on') ? 's' : '';

			$protocol = substr(strtolower($_SERVER['SERVER_PROTOCOL']), 0, strpos(strtolower($_SERVER['SERVER_PROTOCOL']), '/')) . $s;

			$port = ($_SERVER['SERVER_PORT'] == '80') ? '' : (":".$_SERVER['SERVER_PORT']);

			if ($parse) {

				return parse_url($protocol . "://" . $_SERVER['HTTP_HOST'] . $port . $_SERVER['REQUEST_URI']);

			} else { 

				return $protocol . "://" . $_SERVER['HTTP_HOST'] . $port . $_SERVER['REQUEST_URI'];

			}

		}

	}



	/***************************************************************

	* Function null_obscure_login

	* Make the login error message a touch more generic - add to options?

	***************************************************************/



	add_filter( 'login_errors', 'null_obscure_login' );



	function null_obscure_login($error) { 

		$new_message = __('The credentials you provided are incorrect.', 'null');

		$error = str_replace( 'Invalid username.', $new_message, $error );

		$error = preg_replace( '{The password you entered for the username <strong>.*</strong> is incorrect.}', $new_message, $error );

		return $error;

	}



	/***************************************************************

	* Function null_string_search

	* Search a $string for $needle

	***************************************************************/

	

	function null_string_search($needle,$string) {

	

		return (strpos($string, $needle) !== false);

	

	}

	

	/***************************************************************

	* Function null_slugify

	* Create a friendly URL slug from a string

	***************************************************************/

	

	function null_slugify($str) {

		

		// $str2 = sanitize_title_with_dashes($str); - replace with?

	    $str = preg_replace('/[^a-zA-Z0-9 -]/', '', $str);

	    $str = strtolower(str_replace(' ', '-', trim($str)));

	    $str = preg_replace('/-+/', '-', $str);



	    //if ($str != $str2) echo ('slugs differ ('.$str.' - '.$str2.')<br/>');

	   	return $str;



	}	



?>