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// http://www.wpbeginner.com/wp-tutorials/25-extremely-useful-tricks-for-the-wordpress-functions-file/



// Add Google Analytics
add_action('wp_footer', 'add_googleanalytics');
function add_googleanalytics() { ?>
// Paste your Google Analytics code from Step 6 here

// Add a Favicon to your Blog
function blog_favicon() {
echo '<link rel="Shortcut Icon" type="image/x-icon" href="'.get_bloginfo('wpurl').'http://cdn.wpbeginner.com/favicon.ico" />';
}
add_action('wp_head', 'blog_favicon');

// Remove WordPress Version Number
function wpbeginner_remove_version() {
return '';
}
add_filter('the_generator', 'wpbeginner_remove_version');

// Add a Custom Dashboard Logo
//hook the administrative header output
add_action('admin_head', 'my_custom_logo');

function my_custom_logo() {
echo '
<style type="text/css">
#header-logo { background-image: url('.get_bloginfo('template_directory').'/images/custom-logo.gif) !important; }
</style>
';
}

// Change the Footer in WordPress Admin Panel
function remove_footer_admin () {
echo 'Fueled by <a href="http://www.wordpress.org" target="_blank">WordPress</a> | Designed by <a href="http://www.uzzz.net" target="_blank">Uzzz Productions</a> | WordPress Tutorials: <a href="http://www.wpbeginner.com" target="_blank">WPBeginner</a></p>';
}
add_filter('admin_footer_text', 'remove_footer_admin');

// Add Custom Dashboard Widgets in WordPress
add_action('wp_dashboard_setup', 'my_custom_dashboard_widgets');
function my_custom_dashboard_widgets() {
  global $wp_meta_boxes;
  wp_add_dashboard_widget('custom_help_widget', 'Theme Support', 'custom_dashboard_help');
}
function custom_dashboard_help() {
  echo '<p>Welcome to Custom Blog Theme! Need help? Contact the developer <a href="mailto:yourusername@gmail.com">here</a>. For WordPress Tutorials visit: <a href="http://www.wpbeginner.com" target="_blank">WPBeginner</a></p>';
}

// Change the Default Gravatar in WordPress
add_filter( 'avatar_defaults', 'newgravatar' );
function newgravatar ($avatar_defaults) {
$myavatar = get_bloginfo('template_directory') . '/images/gravatar.gif';
$avatar_defaults[$myavatar] = "WPBeginner";
return $avatar_defaults;
}

// Dynamic Copyright Date in WordPress Footer
function comicpress_copyright() {
global $wpdb;
$copyright_dates = $wpdb->get_results("
SELECT
YEAR(min(post_date_gmt)) AS firstdate,
YEAR(max(post_date_gmt)) AS lastdate
FROM
$wpdb->posts
WHERE
post_status = 'publish'
");
$output = '';
if($copyright_dates) {
$copyright = "&copy; " . $copyright_dates[0]->firstdate;
if($copyright_dates[0]->firstdate != $copyright_dates[0]->lastdate) {
$copyright .= '-' . $copyright_dates[0]->lastdate;
}
$output = $copyright;
}
return $output;
}

// Rewrite Guest Author’s Name with Custom Fields
add_filter( 'the_author', 'guest_author_name' );
add_filter( 'get_the_author_display_name', 'guest_author_name' );
function guest_author_name( $name ) {
global $post;
$author = get_post_meta( $post->ID, 'guest-author', true );
if ( $author )
$name = $author;
return $name;
}

// Enable Post Thumbnails in WordPress
add_theme_support( 'post-thumbnails' );
<?php the_post_thumbnail(); ?>

// Custom Navigation Menus in WordPress 3.0
add_theme_support( 'menus' );
<?php wp_nav_menu( array( 'sort_column' => 'menu_order', 'container_class' => 'menu-header' ) ); ?>

// Remove Default Author Profile Fields in WordPress
add_filter('user_contactmethods','hide_profile_fields',10,1);
function hide_profile_fields( $contactmethods ) {
unset($contactmethods['aim']);
unset($contactmethods['jabber']);
unset($contactmethods['yim']);
return $contactmethods;
}

// Add Author Profile Fields
function my_new_contactmethods( $contactmethods ) {
// Add Twitter
$contactmethods['twitter'] = 'Twitter';
//add Facebook
$contactmethods['facebook'] = 'Facebook';
return $contactmethods;
}
add_filter('user_contactmethods','my_new_contactmethods',10,1);
<?php echo $curauth->twitter; ?>


// Register Sidebar Widgets
if ( function_exists('register_sidebar') )
register_sidebar(array('name'=>'MiddleSidebar',
'before_widget' => '<li class="widget">',
'after_widget' => '</li>',
'before_title' => '<h2 class="widgettitle">',
'after_title' => '</h3>',
));
register_sidebar(array('name'=>'FooterSidebar',
'before_widget' => '<li class="widget">',
'after_widget' => '</li>',
'before_title' => '<h2 class="widgettitle">',
'after_title' => '</h3>',
));