wordpress helpful functions

wordpress.php

// Get Rid of WP Version Footprint Throughout Site
function ryu_remove_version() {
return '';
}
add_filter('the_generator', 'ryu_remove_version');

// Remove Footprints and Search Engine Confusion from wp_head Function
remove_action('wp_head', 'wlwmanifest_link');
remove_action('wp_head', 'rsd_link');
remove_action('wp_head', 'wp_generator');
remove_action('wp_head', 'start_post_rel_link');
remove_action('wp_head', 'index_rel_link');
remove_action('wp_head', 'feed_links_extra', 3 );
remove_action('wp_head', 'feed_links', 2 );
remove_action('wp_head', 'parent_post_rel_link', 10, 0 );
remove_action('wp_head', 'start_post_rel_link', 10, 0 );
remove_action('wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0);

// Remove Emoji CSS and JS from header
remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
remove_action( 'wp_print_styles', 'print_emoji_styles' );

// Change the Wordpress Login Logo
add_action('login_head', 'ryu_custom_login_logo');
function ryu_custom_login_logo() {
    echo '<style type="text/css">
    h1 a { background-image:url('.get_template_directory_uri().'/images/login.png) !important; background-size: 311px 100px !important;height: 100px !important; width: 312px !important; margin-bottom: 30px !important; padding-bottom: 0 !important; }
    .login form { margin-top: 10px !important; }
    </style>';
}

// Change the Login Logo Link
function ryu_url_login_logo(){
    return get_bloginfo( 'wpurl' );
}
add_filter('login_headerurl', 'ryu_url_login_logo');

// Change Login Logo Alt Text
function ryu_login_logo_url_title() {
  return 'MySite.com Logo';
}
add_filter( 'login_headertitle', 'ryu_login_logo_url_title' );

// Change Dashboard Footer Text
function change_footer_admin() {
  echo '<span id="footer-thankyou">My Company - Website design by <a href="#" target="_blank">Ryuzaki Eru</a></span>';
}
add_filter('admin_footer_text', 'change_footer_admin');

// Add a Dashboard Widget for Designer Contact Information
function ryu_add_dashboard_widgets() {
  wp_add_dashboard_widget('wp_dashboard_widget', 'Theme Details', 'ryu_theme_info');
}
add_action('wp_dashboard_setup', 'ryu_add_dashboard_widgets' );
function ryu_theme_info() {
  echo "<ul>
  <li><strong>Developed By:</strong> My Company</li>
  <li><strong>Website:</strong> <a href='#' target='_blank'>www.buildersociety.com</a></li>
  <li><strong>Contact:</strong> <a href='mailto:#'>myemail@address</a></li>
<li><strong>Phone:</strong> (xxx) xxx-xxxx</li>
  </ul>";
}

// Remove replacement "fancy" quotations, etc. added by Wordpress
remove_filter ('single_post_title', 'wptexturize');
remove_filter ('bloginfo', 'wptexturize');
remove_filter ('wp_title', 'wptexturize');
remove_filter ('category_description', 'wptexturize');
remove_filter ('list_cats', 'wptexturize');
remove_filter ('comment_author', 'wptexturize');
remove_filter ('comment_text', 'wptexturize');
remove_filter ('the_title', 'wptexturize');
remove_filter ('the_content', 'wptexturize');
remove_filter ('the_excerpt', 'wptexturize');

// Remove Links From the Admin Bar
function ryu_admin_bar_render() {
    global $wp_admin_bar;
    $wp_admin_bar->remove_menu('comments');
    $wp_admin_bar->remove_menu('wp-logo');
    $wp_admin_bar->remove_menu('view-site');
    $wp_admin_bar->remove_menu('new-media');
}
add_action( 'wp_before_admin_bar_render', 'ryu_admin_bar_render' );

// Stop Empty Search Requests Redirecting to Homepage
function ryu_stop_search_redirect( $vars ) {
    if( isset( $_GET['s'] ) && empty( $_GET['s'] ) )
        $vars['s'] = " ";
    return $vars;
}
add_filter( 'request', 'ryu_stop_search_redirect' );

// Adjust Yoast Breadcrumbs to Show "Here" Instead of Post Title
add_filter('wpseo_breadcrumb_single_link' ,'ryu_change_last_crumb', 10 ,2);
function ryu_change_last_crumb($link_output, $link ){
    $Path=$_SERVER['REQUEST_URI'];
    $URI='http://www.mydomain.com'.$Path;
    if( $link['url'] == $URI ) {
        $link_output = 'Here';
    }
    return $link_output;
}

// Unregister Some Default Widgets
function unregister_default_widgets() {
     unregister_widget('WP_Widget_Calendar');
     unregister_widget('WP_Widget_Archives');
     unregister_widget('WP_Widget_Meta');
     unregister_widget('WP_Widget_Search');
     unregister_widget('WP_Widget_Recent_Comments');
     unregister_widget('WP_Widget_RSS');
     unregister_widget('WP_Widget_Tag_Cloud');
     unregister_widget('Twenty_Eleven_Ephemera_Widget');
}
add_action('widgets_init', 'unregister_default_widgets', 11);

// Create Shortcodes
function ryuShortCode() {
    return 'Whatever Code You Need Goes  Here';
}
add_shortcode('MyAdvertisement', 'ryuShortCode');

//automatically clean up html wysiwyg editor by closing missing tags (ex. <p>, <a>, etc) [wp-admin]
function clean_bad_content($bPrint = false) {
    global $post;
    $szPostContent  = $post->post_content;
    $szRemoveFilter = array("~<p[^>]*>\s?</p>~", "~<a[^>]*>\s?</a>~", "~<font[^>]*>~", "~<\/font>~", "~style\=\"[^\"]*\"~", "~<span[^>]*>\s?</span>~");
    $szPostContent  = preg_replace($szRemoveFilter, '', $szPostContent);
    $szPostContent  = apply_filters('the_content', $szPostContent);
    if ($bPrint == false) return $szPostContent;
    else echo $szPostContent;
}

function remove_default_userfields( $contactmethods ) {
unset($contactmethods['aim']);
unset($contactmethods['jabber']);
unset($contactmethods['yim']);
return $contactmethods;
}
add_filter('user_contactmethods','remove_default_userfields',10,1);

//resize images that are too big to the Large media size setting [speed]
function replace_uploaded_image($image_data){// if there is no large image : returnif(!isset($image_data['sizes']['large']))return $image_data;
$upload_dir = wp_upload_dir();
$uploaded_image_location = $upload_dir['basedir'].'/'.$image_data['file'];
$large_image_location = $upload_dir['path'].'/'.$image_data['sizes']['large']['file'];
unlink($uploaded_image_location);
rename($large_image_location,$uploaded_image_location);
$image_data['width']= $image_data['sizes']['large']['width'];
$image_data['height']= $image_data['sizes']['large']['height'];
unset($image_data['sizes']['large']);
return $image_data;
}
add_filter('wp_generate_attachment_metadata','replace_uploaded_image');

//remove emoji [speed] [footprint]
remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
remove_action( 'wp_print_styles', 'print_emoji_styles' );

add_action('init','jquery_register');

// register from google and for footerfunction jquery_register() {
    if(!is_admin()) {
    wp_deregister_script('jquery');
    wp_register_script('jquery',('https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js'),false,null,true);
    wp_enqueue_script('jquery');
    }
}

//remove CSS from header
add_action( 'wp_print_styles', 'deregister_my_styles', 100 );
function deregister_my_styles() {
    wp_deregister_style( 'jetpack_css' );
}

//add JS to footer
function add_js_to_footer() {
?>
<script>
  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
  (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
  m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
  })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
  ga('create', 'UA-YOURNUMBERSHERE-1', 'auto');
  ga('send', 'pageview');
</script>
<meta name="msvalidate.01" content="YOURNUMBERSHERE" />
<?php
}
add_action( 'wp_footer', 'add_js_to_footer', 999 );

//remove WP version string from header [security] [footprint]
remove_action('wp_head', 'wp_generator');

//hide login error messages (ex. "Wrong Password") [security] [footprint]
add_filter('login_errors',create_function('$a', "return null;"));

//remove admin name in comments class [security] [footprint]
function remove_comment_author_class( $classes ) {
    foreach( $classes as $key => $class ) {
        if(strstr($class, "comment-author-")) {
            unset( $classes[$key] );
        }
    }
    return $classes;
}
add_filter( 'comment_class' , 'remove_comment_author_class' );

//remove WP version param from any enqueued scripts [security] [footprint] [speed]
function remove_wpversion_cssjs( $src ) {
    if ( strpos( $src, 'ver=' ) )
        $src = remove_query_arg( 'ver', $src );
    return $src;
}
add_filter( 'style_loader_src', 'remove_wpversion_cssjs', 999 );
add_filter( 'script_loader_src', 'remove_wpversion_cssjs', 999 );

//change URL string from Author to Writer [footprint]
function new_author_base() {
global $wp_rewrite;
    $author_slug ='sellers';
    $wp_rewrite->author_base = $author_slug;
}
add_action('init','new_author_base');