Agile WordPress

How to Display Text to Only Logged in WordPress Users

May 10 2014

Create Shortcode for Logged in Users

function logged_in_only_shortcode($atts, $content = null) {
    if (is_user_logged_in() &amp;&amp; !is_null($content) &amp;&amp; !is_feed()) {
        return $content;
    }
}
add_shortcode('logged_in_only', 'logged_in_only_shortcode');

To use this shortcode in your post use the following code.
[logged_in_only]User is logged in.[/logged_in_only]

Create Shortcode for Logged Out Users
function logged_out_only_shortcode($atts, $content = null) {
    if (!is_user_logged_in() &amp;&amp; !is_null($content) &amp;&amp; !is_feed()) {
        return $content;
    }
}
add_shortcode('logged_out_only', 'logged_out_only_shortcode');

To use this shortcode in your post use the following code.
[logged_out_only]User is logged out.[/logged_out_only]

Resource: Display Text To Only Logged In WordPress Users

The Online Entrepreneur eBook Bundle till 17th May 2014

May 3 2014

If you are still pondering buying the Digging into WordPress book, it's now included in The Online Entrepreneur eBook Bundle .

How to Remove WordPress’ jQuery and Use Google’s CDN Version Instead?

CDN, jQuery, performance

Aug 24 2013

Why Use Google’s CDN?

The three most commonly cited reasons to dequeue WordPress’ bundled version of jQuery in favor of Googles are:

Decreased Latency.
Increased Parallelism.
Better Caching.

Why NOT Use Google’s CDN?

WordPress takes great care to make sure its bundled libraries are fully compatible with other bundled scripts. jQuery is loaded in “no conflict” mode to prevent any potential script collisions over the $ variable in the global namespace.
If you load jQuery 1.9 yourself from Google’s CDN, you’ll miss out on the jQuery Migrate plugin and end up breaking several themes and plugins that depend on these deprecated APIs.
Also, WordPress is taking steps to prevent you from dequeueing jQuery on the back end at all.

Source: Don't Dequeue WordPress' jQuery

Then, How to Remove WordPress’ jQuery and Use Google’s CDN Version Instead?

function jquery_cdn() {
   if (!is_admin()) {
      wp_deregister_script('jquery');
      wp_register_script('jquery', 'http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js', false, '1.8.3');
      wp_enqueue_script('jquery');
   }
}
add_action('init', 'jquery_cdn');

Comment by Nathan Rice:

This is almost sure to cause warnings if you have WP_DEBUG on. The reason being that wp_register_script should only be called on the wp_enqueue_scripts action hook.

Sources:
How to load jQuery from Google CDN
Replace default WordPress jQuery script with Google Library

How to Sort the My Sites Listing on Both the Page and in the Admin Bar Dropdown

admin bar

Aug 3 2013

Example code from Stack Exchange on how to sort the My Sites listing on both the page and in the admin bar dropdown:

function dccf_sort_my_sites($blogs) {
	$f = create_function('$a,$b','return strcasecmp($a->blogname,$b->blogname);');
	uasort($blogs, $f);
	return $blogs;
}
add_filter('get_blogs_of_user', 'dccf_sort_my_sites');

How to Add an Admin Bar Menu Link

admin bar

Aug 3 2013

Here is an example code how to add Editorial Calendar plugin admin bar menu link:

function add_editorial_calendar_admin_bar_link() {
	global $wp_admin_bar;
	if (!is_super_admin() || !is_admin_bar_showing())
		return;
	$wp_admin_bar->add_menu(array(
		'id' => 'editorial_calendar_link',
		'title' => __('Editorial Calendar'),
		'href' => __('http://' . strtolower($_SERVER['HTTP_HOST']) . '/wp-admin/edit.php?page=cal'),
	) );
}
add_action('admin_bar_menu', 'add_editorial_calendar_admin_bar_link', 75);

The UI Problem of WordPress Plugins and Themes

developing

Dec 31 2011

Trent:
Our old theme options had WordPress like tabs, and check boxes galore. We then opted for making our theme options intuitive, and pretty. They look more like an iOS device then they do WordPress, and guess what? Our support requests dropped significantly, and we never have to link users to our documentation anymore.