<?php wp_tag_cloud( array(

    'smallest' => 8,          // font size for the least used tag
    'largest'  => 22,         // font size for the most used tag
    'unit'     => 'px',       // font sizing choice (pt, em, px, etc)
    'number'   => 45,         // maximum number of tags to show
    'format'   => 'flat',     // flat, list, or array. flat = spaces between; list = in li tags; array = does not echo results, returns array
    'orderby'  => 'name',     // name = alphabetical by name; count = by popularity
    'order'    => 'ASC',      // starting from A, or starting from highest count
    'exclude'  => 12,         // ID's of tags to exclude, displays all except these
    'include'  => 13,         // ID's of tags to include, displays none except these
    'link'     => 'view',     // view = links to tag view; edit = link to edit tag
    'taxonomy' => 'post_tag', // post_tag, link_category, category - create tag clouds of any of these things
    'echo'     => true        // set to false to return an array, not echo it

) ); ?>

The default sizing, if none supplied, for this function is "pt" which is a bit unusual and often unreliable so make sure you change that parameter to how you size fonts normally on your site.

Less Weird Font Sizing

Tag clouds accomplish their varied font sizes by applying inline styling to each tag. The resulting font sizes can be really weird like style='font-size:29.3947354754px;'. Mike Summers proposes this solution:

<div id="tagCloud">
	<ul>
		<?php
			$arr = wp_tag_cloud(array(
				'smallest'             => 8,                      // font size for the least used tag
				'largest'                => 40,                    // font size for the most used tag
				'unit'                      => 'px',                 // font sizing choice (pt, em, px, etc)
				'number'              => 200,                 // maximum number of tags to show
				'format'                => 'array',            // flat, list, or array. flat = spaces between; list = in li tags; array = does not echo results, returns array
				'separator'          => '',                      //
				'orderby'              => 'name',           // name = alphabetical by name; count = by popularity
				'order'                   => 'RAND',          // starting from A, or starting from highest count
				'exclude'              => '',                      // ID's of tags to exclude, displays all except these
				'include'               => '',                      // ID's of tags to include, displays none except these
				'link'                       => 'view',             // view = links to tag view; edit = link to edit tag
				'taxonomy'         => 'post_tag',    // post_tag, link_category, category - create tag clouds of any of these things
				'echo'                    => true                 // set to false to return an array, not echo it
			));
			foreach ($arr as $value) {
				$ptr1 = strpos($value,'font-size:');
				$ptr2 = strpos($value,'px');
				$px = round(substr($value,$ptr1+10,$ptr2-$ptr1-10));
				$value = substr($value, 0, $ptr1+10) . $px . substr($value, $ptr2);
				$ptr1 = strpos($value, "class=");
				$value = substr($value, 0, $ptr1+7) . 'color-' . $px . ' ' . substr($value, $ptr1+7);
				echo '<li>' . $value . '</li> ';
			}
		?>
	</ul>
</div>

The result turns this:

<a href='url' class='tag-link-66' title='6 topics' style='font-size:29.3947354754px;'>Tag Name</a>

into this:

<a href='url' class='color-29 tag-link-66' title='6 topics' style='font-size:29px;'>Tag Name</a>

Notice the added bonus that the links has a class name of "color-29" now that it didn't before. Now you have a hook to colorize tag names based on their size.

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function my_formatter($content) {
       $new_content = '';
       $pattern_full = '{(\[raw\].*?\[/raw\])}is';
       $pattern_contents = '{\[raw\](.*?)\[/raw\]}is';
       $pieces = preg_split($pattern_full, $content, -1, PREG_SPLIT_DELIM_CAPTURE);

       foreach ($pieces as $piece) {
               if (preg_match($pattern_contents, $piece, $matches)) {
                       $new_content .= $matches[1];
               } else {
                       $new_content .= wptexturize(wpautop($piece));
               }
       }

       return $new_content;
}

remove_filter('the_content', 'wpautop');
remove_filter('the_content', 'wptexturize');

add_filter('the_content', 'my_formatter', 99);

This goes in the PHP in your functions.php file. Once done, you can use the [raw] shortcode in your posts: [raw]Unformatted code[/raw]

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Add to functions.php file

remove_filter('the_content', 'wptexturize');
remove_filter('the_excerpt', 'wptexturize');
remove_filter('comment_text', 'wptexturize');
remove_filter('the_title', 'wptexturize');

the wptexturize function is responsible for lots of automatic alterations to text stored in WordPress like automatic elipses (...), em and en dashes, typographers quotes, etc.

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Just post a link to a GitHub Gist and it will be nicely embedded. Or use the format this snippet provides and create the shortcode yourself. For your functions.php file:

<?php
// [gist id="ID" file="FILE"]
function gist_shortcode($atts) {
  return sprintf(
    '<script src="https://gist.github.com/%s.js%s"></script>', 
    $atts['id'], 
    $atts['file'] ? '?file=' . $atts['file'] : ''
  );
} add_shortcode('gist','gist_shortcode');

// Remove this function if you don't want autoreplace gist links to shortcodes
function gist_shortcode_filter($content) {
  return preg_replace('/https:\/\/gist.github.com\/([\d]+)[\.js\?]*[\#]*file[=|_]+([\w\.]+)(?![^<]*<\/a>)/i', '[gist id="${1}" file="${2}"]', $content );
} add_filter( 'the_content', 'gist_shortcode_filter', 9);
?>

Any of these formats will work:

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You know, the one typically at yoursite.com/wp-login.php. These are things you would put in the active theme's functions.php file.

Change the Logo

Is the WordPress logo by default, this changes the file path of that image. Change file path and file name to your own needs.

function custom_login_logo() {
	echo '<style type="text/css">h1 a { background: url('.get_bloginfo('template_directory').'http://cdn.css-tricks.com/images/logo-login.gif) 50% 50% no-repeat !important; }</style>';
}
add_action('login_head', 'custom_login_logo');

Change the URL

... of where clicking that logo goes. By default it goes to WordPress.org, this will change it to your own homepage.

function change_wp_login_url() {
	return bloginfo('url');
}
add_filter('login_headerurl', 'change_wp_login_url');

Change the Title

That is, change the title attribute of the image you just replaced. This changes it to the name of your blog in the settings.

function change_wp_login_title() {
	return get_option('blogname');
}
add_filter('login_headertitle', 'change_wp_login_title');

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In a typical WordPress theme you output the entire list of comments for a Post/Page by using the function wp_list_comments(). This doesn't offer much by the way of customizing what HTML markup gets generated for that comment list. To write your own markup for the comment list, you can use a callback function as a parameter in wp_list_comments(), so it's just as nicely abstracted.

In functions.php

<?php
function my_custom_comments($comment, $args, $depth) {
   $GLOBALS['comment'] = $comment; ?>
   <li <?php comment_class(); ?> id="li-comment-<?php comment_ID() ?>">
   <?php if ($comment->comment_approved == '0') : ?>
      <em><?php _e('Your comment is awaiting moderation.') ?></em>
   <?php endif; ?>

   // Comments markup code here, e.g. functions like comment_text(); 

}
?>

In comments.php

<?php 
   wp_list_comments("callback=my_custom_comments"); 
?>

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The wp_list_comments function has a parameter to change the default (48px) size to anywhere between 0 and 80px.

wp_list_comments('avatar_size=80');

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