Debug function from Wonderflux

gistfile1.php

<?php
/**
 * Displays input in a nicer way for debugging
 * Only displays for top level site admin by default
 * Part of the Wonderflux theme framework
 *
 * @param string $input The content you wish to debug - a variable or function.
 * @param string $admin_only Only display to top level site admin not other users. Default=true
 * @param bool $role Only display to supplied WordPress role. Default = ''
 * @param integer $id Only display to supplied user ID. Default = ''
 */
function wfx_debug( $input='', $admin_only=true, $role=false, $id=false ) {

	// Check against top level admin
	if ( $admin_only && !is_super_admin() )
		return;
	// Check against user role
	if ( $role && !current_user_can($role) )
		return;
	// Check against user ID
	if ( is_integer($id) && get_current_user_id() != $id )
		return;

	$o = '<div style="color:#000; padding:5px; overflow:auto; border: 4px solid #ff0a0a; background-color: #fec9c9;" class="wfx_debug_output">';

	if ( empty($input) ) {
		$o .= '<pre>' . esc_attr__('No data returned or false/empty/null', 'wonderflux') . '</pre>';
	} else {

		switch ( $input ) {
			case 'wp_query':
				$input_type = 'WordPress core $wp_query';
			break;

			case 'wp_posts':
				$input_type = 'WordPress core $posts';
			break;

			case 'wp_queried':
				$input_type = 'Currently queried object';
			break;

			case 'wp_all_taxonomies':
				$input_type = 'All taxonomies';
			break;

			default:
				$input_type = gettype($input);
			break;
		}

		if ( $input === 'wp_query' ) {
			global $wp_query;
			$input = $wp_query;
		} elseif ( $input === 'wp_posts' ) {
			global $posts;
			$input = $posts;
		} elseif ( $input === 'wp_queried' ) {
			$input = get_queried_object();
		} elseif ( $input === 'wp_all_taxonomies' ) {
			global $wp_taxonomies;
			$input = $wp_taxonomies;
		}

		$o .= '<pre><strong>' . esc_attr__('Debug output for data type:', 'wonderflux') . '</strong> ' . $input_type . '</pre>';
		if (is_array($input) || is_object($input)) {
   			$o .= '<pre>' . print_r($input,true) . '</pre>';
		} else {
			$o .= '<p>' . $input . '</p>';
		}
	}
	$o .= '</div>';

	echo $o;

}
?>