My collection of custom functions for use with WP. Manipulating post content and titles, article content and titles, seo, cleanup, etc, misc..

dcWPFunctions.html

<?php
/**
 * Limit previous/next post title character length and append a ellipsis if trunicated
 */
$previous_post  = get_adjacent_post( false, '', true );
$next_post		= get_adjacent_post( false, '', false );
$previous_post_title=  get_the_title($previous_post);
$next_post_title	= get_the_title($next_post);
$max_length = 75;
$previous_post_length = strlen($previous_post_title);
$next_post_length = strlen($next_post_title);

if ($previous_post_length > $max_length) {
	$previous_post_excerpt = substr($previous_post_title, 0, $max_length) . '...';	
} else {
	$previous_post_excerpt = $previous_post_title;
}
if ($next_post_length > $max_length) {
	$next_post_excerpt = substr($next_post_title, 0, $max_length) . '...';	
} else {
	$next_post_excerpt = $next_post_title;
}
?>

	<nav class="c-nav">
		<div class="prev">
			<a href="<?php echo make_href_root_relative( get_permalink( $previous_post ) ); ?>" class="prev">Previous Post<br><span><?php echo $previous_post_excerpt; ?></span></a>
		</div>
		<div class="next">
			<a href="<?php echo make_href_root_relative( get_permalink( $next_post ) ); ?>" class="next">Next Post<br><span><?php echo $next_post_excerpt; ?></span></a>
		</div>
	</nav>

<?php	
/**
 * Limit Article title character length and append  an ellipsis if trunicated, allow the full length of the title to display on the singlearticle page
 */
$the_title = esc_attr ( the_title_attribute ( 'echo=0' ) );
$max_length = 38;
$title_length = strlen ( $the_title );

if ( $title_length > $max_length ) {
	$title_excerpt = substr ( $the_title, 0, $max_length ) . '...';
} else {
	$title_excerpt = $the_title;
}

/**
 * Call the first paragraph of article as excerpt and then slide open the full article (afer first paragraph) without AJAX
 */
function get_first_paragraph(){
	global $post;

	$str = wpautop( get_the_content() );
	$str = substr( $str, 0, strpos( $str, '</p>' ) + 4 );
	$str = strip_tags($str, '<a><strong><em>');

	return '<p>' . $str . '</p>';
}
function get_the_post(){
	global $post;
	$str = wpautop( get_the_content() );
	$str = substr( $str, (strpos( $str, '</p>')));
	return $str;
}
?>

<script>
jQuery ( document ).ready ( function () {
	jQuery ( ".content" ).hide ();
	jQuery ( ".entry-footer" ).hide ();
	jQuery ( ".more" ).click ( function () {
		jQuery ( this ).parent ().next ( '.content' ).show ( "blind", {direction : "vertical"}, 750 );
		jQuery ( this ).next ( '.entry-footer' ).show ( "fast" );
		jQuery ( this ).hide ();
	} );
	jQuery ( ".close" ).click ( function () {
		jQuery ( this ).parent ( ".content" ).hide ( "blind", {direction : "vertical"}, 750 );
		jQuery ( ".more" ).show ();
	} );
} );
</script>


	<span class="excerpt">
		<?php echo get_first_paragraph(); ?>
		<span class="more">+ more</span>
	</span>
	<span class="content">
		<?php echo get_the_post(); ?>
		<?php
			$content = get_the_content();
			print substr( $content, ( $lithograph_theme_options['excerpt_length'] + 1 ) );
		?>
		<span class="close">- close</span>

		<?php get_template_part( 'content', 'footer' ); ?>
	</span>

functions.php

<?php 
/**
 * Rename Posts, Articles
 */
function litho_posts_articles() {
	global $menu;
	global $submenu;
	$menu[5][0] = __("Articles", 'litho');
	$submenu['edit.php'][5][0] = __("Articles", 'litho');
	$submenu['edit.php'][10][0] = __("New Article", 'litho');

	echo '';
}
function litho_posts_articles_label() {
		global $wp_post_types;
		$labels = &$wp_post_types['post']->labels;
		$labels->name = __("Articles", 'litho');
		$labels->singular_name = __("Article", 'litho');
		$labels->add_new = __("New Article", 'litho');
		$labels->add_new_item = __("New Article", 'litho');
		$labels->edit_item = __("Edit Article", 'litho');
		$labels->new_item = __("Article", 'litho');
		$labels->view_item = __("View Article", 'litho');
		$labels->search_items = __("Search Articles", 'litho');
		$labels->not_found = __("No Article Found", 'litho');
		$labels->not_found_in_trash = __("No Articles found in Trash", 'litho');
	}
add_action( 'init', 'litho_posts_articles_label' );
add_action( 'admin_menu', 'litho_posts_articles' );

/**
 * Remove default taxonomies Categories and Tags
 */
function unregister_taxonomy() {
    global $wp_taxonomies;
    $taxonomy = 'taxonomy_to_remove';
    if ( taxonomy_exists($taxonomy) ) {
        unset( $wp_taxonomies[$taxonomy] );
    }
}
add_action( 'init', 'unregister_taxonomy' );

/**
 * Convert hexdec color string to rgb(a) string
 * @param	   $color
 * @param bool $opacity
 *
 * @return string
 */
function hex2rgba( $color, $opacity = false ) {
	$default = 'rgba(255,255,255,0.5)';
	//Return default if no color provided
	if ( empty( $color ) ) return $default;
	//Sanitize $color if "#" is provided
	if ( $color[0] == '#' ) $color = substr( $color, 1 );

	//Check if color has 6 or 3 characters and get values
	if ( strlen( $color ) == 6 ) {
		$hex = array ( $color[0] . $color[1], $color[2] . $color[3], $color[4] . $color[5] );
	} elseif ( strlen( $color ) == 3 ) {
		$hex = array ( $color[0] . $color[0], $color[1] . $color[1], $color[2] . $color[2] );
	} else return $default;

	//Convert hex to rgb
	$rgb = array_map( 'hexdec', $hex );
	//Check if opacity is set(rgba or rgb)
	if ( $opacity ) {
		if ( abs( $opacity ) > 1 ) $opacity = 1.0;
		$output = 'rgba(' . implode( ",", $rgb ) . ',' . $opacity . ')';
	} else $output = 'rgb(' . implode( ",", $rgb ) . ')';

	return $output;
}

/**
 *  Google Plus Authorship
 */
add_action('wp_head', 'litho_googleplus_authorship');
function litho_googleplus_authorship() {
	echo "<link rel='author' href='https://plus.google.com/s/....... />";
}

/** Filters the page title appropriately depending on the current page */
add_filter( 'wp_title', 'lithograph_filter_wp_title', 10, 2 );
if ( ! function_exists( 'lithograph_filter_wp_title' ) ) {
	function lithograph_filter_wp_title( $title, $sep ) {
		global $paged, $page;
		if ( is_feed() ) {
			return $title;
		}
		$title .= get_bloginfo( 'name' );
		$site_description = get_bloginfo( 'description', 'display' ); // Add the site description for the home/front page.
		if ( $site_description && ( is_home() || is_front_page() ) ) {
			$title = "$title $sep $site_description";
		}
		// Add a page number if necessary.
		if ( $paged >= 2 || $page >= 2 ) {
			$title = "$title $sep " . sprintf( __( 'Page %s', 'litho' ), max( $paged, $page ) );
		}

		return $title;
	}
}


function basic_wp_seo() {
	global $page, $paged, $post;
	$default_keywords = 'wordpress, plugins, themes, design, dev, development, security, htaccess, apache, php, sql, html, css, jquery, javascript, tutorials'; // customize
	$output           = '';
	// description
	$seo_desc    = get_post_meta( $post->ID, 'mm_seo_desc', true );
	$description = get_bloginfo( 'description', 'display' );
	$pagedata    = get_post( $post->ID );
	if ( is_singular() ) {
		if ( ! empty( $seo_desc ) ) {
			$content = $seo_desc;
		} else if ( ! empty( $pagedata ) ) {
			$content = apply_filters( 'the_excerpt_rss', $pagedata->post_content );
			$content = substr( trim( strip_tags( $content ) ), 0, 155 );
			$content = preg_replace( '#\n#', ' ', $content );
			$content = preg_replace( '#\s{2,}#', ' ', $content );
			$content = trim( $content );
		}
	} else {
		$content = $description;
	}
	$output .= '<meta name="description" content="' . esc_attr( $content ) . '">' . "\n";
	// keywords
	$keys = get_post_meta( $post->ID, 'mm_seo_keywords', true );
	$cats = get_the_category();
	$tags = get_the_tags();
	if ( empty( $keys ) ) {
		if ( ! empty( $cats ) ) {
			foreach ( $cats as $cat ) {
				$keys .= $cat->name . ', ';
			}
		}
		if ( ! empty( $tags ) ) {
			foreach ( $tags as $tag ) {
				$keys .= $tag->name . ', ';
			}
		}
		$keys .= $default_keywords;
	}
	$output .= "\t\t" . '<meta name="keywords" content="' . esc_attr( $keys ) . '">' . "\n";
	// robots
	if ( is_category() || is_tag() ) {
		$paged = ( get_query_var( 'paged' ) ) ? get_query_var( 'paged' ) : 1;
		if ( $paged > 1 ) {
			$output .= "\t\t" . '<meta name="robots" content="noindex,follow">' . "\n";
		} else {
			$output .= "\t\t" . '<meta name="robots" content="index,follow">' . "\n";
		}
	} else if ( is_home() || is_singular() ) {
		$output .= "\t\t" . '<meta name="robots" content="index,follow">' . "\n";
	} else {
		$output .= "\t\t" . '<meta name="robots" content="noindex,follow">' . "\n";
	}
	// title
	$title_custom = get_post_meta( $post->ID, 'mm_seo_title', true );
	$url          = ltrim( esc_url( $_SERVER['REQUEST_URI'] ), '/' );
	$name         = get_bloginfo( 'name', 'display' );
	$title        = trim( wp_title( '', false ) );
	$cat          = single_cat_title( '', false );
	$tag          = single_tag_title( '', false );
	$search       = get_search_query();
	if ( ! empty( $title_custom ) ) {
		$title = $title_custom;
	}
	if ( $paged >= 2 || $page >= 2 ) {
		$page_number = ' | ' . sprintf( 'Page %s', max( $paged, $page ) );
	} else {
		$page_number = '';
	}
	if ( is_home() || is_front_page() ) {
		$seo_title = $name . ' | ' . $description;
	} elseif ( is_singular() ) {
		$seo_title = $title . ' | ' . $name;
	} elseif ( is_tag() ) {
		$seo_title = 'Tag Archive: ' . $tag . ' | ' . $name;
	} elseif ( is_category() ) {
		$seo_title = 'Category Archive: ' . $cat . ' | ' . $name;
	} elseif ( is_archive() ) {
		$seo_title = 'Archive: ' . $title . ' | ' . $name;
	} elseif ( is_search() ) {
		$seo_title = 'Search: ' . $search . ' | ' . $name;
	} elseif ( is_404() ) {
		$seo_title = '404 - Not Found: ' . $url . ' | ' . $name;
	} else {
		$seo_title = $name . ' | ' . $description;
	}
	$output .= "\t\t" . '<title>' . esc_attr( $seo_title . $page_number ) . '</title>' . "\n";

	return $output;
}

// Use HTML5 FIGURE and FIGCAPTION for images and captions
function im_cleaner_captions( $output, $attr, $content ) {
	if ( is_feed() ) {
		return $output;
	}
	$defaults = array (
		'id'      => '',
		'align'   => 'alignnone',
		'width'   => '',
		'caption' => ''
	);
	$attr = shortcode_atts( $defaults, $attr );
	if ( 1 > $attr['width'] || empty( $attr['caption'] ) ) {
		return $content;
	}
	$attributes = ( ! empty( $attr['id'] ) ? ' id="' . esc_attr( $attr['id'] ) . '"' : '' );
	$attributes .= ' class="wp-caption ' . esc_attr( $attr['align'] ) . '"';
	$output = '<figure' . $attributes . '>';
	$output .= do_shortcode( $content );
	$output .= '<figcaption class="wp-caption-text"><p>' . $attr['caption'] . '</p></figcaption>';
	$output .= '</figure>';

	return $output;
}

add_filter( 'img_caption_shortcode', 'im_cleaner_captions', 10, 3 );

housecleaner.php

<?php

if ( extension_loaded( "zlib" ) && ( ini_get( "output_handler" ) != "ob_gzhandler" ) ) {
	add_action( 'wp', create_function( '', '@ob_end_clean();@ini_set("zlib.output_compression", 1);' ) );
}

if ( ! defined( 'WP_POST_REVISIONS' ) ) {
	define( 'WP_POST_REVISIONS', 5 );
}

function disable_dashboard_widgets() {
	remove_action('welcome_panel', 'wp_welcome_panel');

	remove_meta_box ( 'dashboard_recent_comments', 'dashboard', 'core' ); // Comments Widget
	remove_meta_box ( 'dashboard_incoming_links', 'dashboard', 'core' ); // Incoming Links Widget
	remove_meta_box ( 'dashboard_plugins', 'dashboard', 'core' ); // Plugins Widget
	// remove_meta_box('dashboard_quick_press', 'dashboard', 'core' );   // Quick Press Widget
	remove_meta_box ( 'dashboard_recent_drafts', 'dashboard', 'core' ); // Recent Drafts Widget
	remove_meta_box ( 'dashboard_primary', 'dashboard', 'core' ); //
	remove_meta_box ( 'dashboard_secondary', 'dashboard', 'core' ); //
	// removing plugin dashboard boxes
	remove_meta_box ( 'yoast_db_widget', 'dashboard', 'normal' ); // Yoast's SEO Plugin Widget
}
add_action( 'admin_menu', 'disable_dashboard_widgets' );





function litho_adminmenus() {
	remove_submenu_page( 'themes.php', 'theme-editor.php' );
	remove_submenu_page( 'themes.php', 'plugin-editor.php' );
	remove_menu_page( 'tools.php' );
}

function litho_udpatenotice() {
	remove_action( 'admin_notices', 'update_nag', 3 );
}


function litho_clean_rss() {
	wp_die( __( 'No feed available,please visit our <a href="' . get_bloginfo( 'url' ) . '">homepage</a>!' ) );
}

/**
 * Disable self-ping
 * @param $links
 */
function litho_clean_ping( &$links ) {
	$home = get_option( 'home' );
	foreach ( $links as $l => $link ) {
		if ( 0 === strpos( $link, $home ) ) {
			unset( $links[ $l ] );
		}
	}
}

function litho_clean_widgets() {
	unregister_widget( 'WP_Widget_Pages' );
	unregister_widget( 'WP_Widget_Calendar' );
	unregister_widget( 'WP_Widget_Archives' );
	unregister_widget( 'WP_Widget_Links' );
	unregister_widget( 'WP_Widget_Meta' );
	unregister_widget( 'WP_Widget_Search' );
	unregister_widget( 'WP_Widget_Text' );
	unregister_widget( 'WP_Widget_Categories' );
	unregister_widget( 'WP_Widget_Recent_Comments' );
	unregister_widget( 'WP_Widget_RSS' );
	unregister_widget( 'WP_Widget_Tag_Cloud' );
}

function litho_dashboard() {
	global $wp_admin_bar;
	$wp_admin_bar->remove_menu( 'wp-logo' );
	$wp_admin_bar->remove_menu( 'about' );
	$wp_admin_bar->remove_menu( 'wporg' );
	$wp_admin_bar->remove_menu( 'documentation' );
	$wp_admin_bar->remove_menu( 'support-forums' );
	$wp_admin_bar->remove_menu( 'feedback' );
	$wp_admin_bar->remove_menu( 'view-site' );
}

function litho_clean_jetpack() {
	wp_deregister_style( 'AtD_style' );
	wp_deregister_style( 'jetpack-carousel' );
	wp_deregister_style( 'grunion.css' );
	wp_deregister_style( 'the-neverending-homepage' );
	wp_deregister_style( 'infinity-twentyten' );
	wp_deregister_style( 'infinity-twentyeleven' );
	wp_deregister_style( 'infinity-twentytwelve' );
	wp_deregister_style( 'noticons' );
	wp_deregister_style( 'post-by-email' );
	wp_deregister_style( 'publicize' );
	wp_deregister_style( 'sharedaddy' );
	wp_deregister_style( 'sharing' );
	wp_deregister_style( 'stats_reports_css' );
	wp_deregister_style( 'jetpack-widgets' );
	wp_dequeue_script( 'devicepx' );
}

/**
 * Disable WP generating multiple image sizes
 * @param $sizes
 *
 * @return mixed
 */
function litho_original_images( $sizes ) {
	unset( $sizes['thumbnail'] );
	unset( $sizes['medium'] );
	unset( $sizes['large'] );
	return $sizes;
}

/**
 * Remove version from scripts and styles
 * @param $src
 *
 * @return mixed
 */
function litho_versioning( $src ) {
	$parts = explode( '?', $src );

	return $parts[0];
}

/**
 * Remove WP version from head and RSS
 * @return string
 */
function litho_wpversioning() {
	return '';
}

add_action( 'admin_menu', 'litho_adminmenus', 999 );
add_action( 'admin_menu', 'litho_udpatenotice' ); // Admin update notifications
add_action( 'do_feed', 'litho_clean_rss', 1 ); // RSS feeds
add_action( 'do_feed_atom', 'litho_clean_rss', 1 ); // Atom feeds
add_action( 'do_feed_rdf', 'litho_clean_rss', 1 ); // RDF feed
add_action( 'do_feed_rss', 'litho_clean_rss', 1 ); // RSS feed
add_action( 'do_feed_rss2', 'litho_clean_rss', 1 ); // RSS2 feed
add_action( 'pre_ping', 'litho_clean_ping' ); // Self ping
add_action( 'widgets_init', 'litho_clean_widgets', 1 ); // Widget styles
add_action( 'wp_before_admin_bar_render', 'litho_dashboard' );
add_action( 'wp_enqueue_scripts', 'litho_clean_jetpack', 20 );
add_action( 'wp_print_styles', 'litho_clean_jetpack' ); // Jetpack styles

add_filter( 'intermediate_image_sizes_advanced', 'litho_original_images' );
add_filter( 'login_errors', create_function( '$a', "return 'Error';" ) ); // Login errors
add_filter( 'show_admin_bar', '__return_false' ); // Admin bar
add_filter( 'script_loader_src', 'litho_versioning', 15, 1 ); // Scripts version
add_filter( 'style_loader_src', 'litho_versioning', 15, 1 ); // Styles version
add_filter( 'the_generator', 'litho_wpversioning' ); // WP version
add_filter( 'use_default_gallery_style', '__return_false' ); // Gallery styles
add_filter( 'xmlrpc_enabled', '__return_false' ); // XMLRPC

remove_action( 'wp_head', 'feed_links', 2 );
remove_action( 'wp_head', 'feed_links_extra', 3 );
remove_action( 'wp_head', 'rsd_link' ); // remove Really Simple Discovery protocol from header
remove_action( 'wp_head', 'wlwmanifest_link' ); // remove Windows Live Writer from header
remove_action( 'wp_head', 'wp_shortlink_wp_head' ); // remove WP post and page shortlinks

remove_filter( 'comment_text', 'make_clickable', 9 ); // Auto Linking URLs in comments

more.php

/* Post Format Navigation. */
$formats = get_terms( 'post_format' );
if ( ! is_wp_error( $formats ) ) {
    print '<ul>' . "\n";
    foreach ( $formats as $format ) {
        $href = get_term_link( $format, 'post_format' );
        $text = get_post_format_string( str_replace( 'post-format-', '', $format->slug ) );
        print '<li><a href="' . $href . '">' . $text . '</a></li>' . "\n"; 
    }
    print '</ul>' . "\n";
}


/**
 * Define default terms for custom taxonomies in WordPress 3.0.1
 *
 * @author    Michael Fields     http://wordpress.mfields.org/
 * @props     John P. Bloch      http://www.johnpbloch.com/
 *
 * @since     2010-09-13
 * @alter     2010-09-14
 *
 * @license   GPLv2
 */
function mfields_set_default_object_terms( $post_id, $post ) {
    if ( 'publish' === $post->post_status ) {
        $defaults = array(
            'post_tag' => array( 'taco', 'banana' ),
            'monkey-faces' => array( 'see-no-evil' ),
            );
        $taxonomies = get_object_taxonomies( $post->post_type );
        foreach ( (array) $taxonomies as $taxonomy ) {
            $terms = wp_get_post_terms( $post_id, $taxonomy );
            if ( empty( $terms ) && array_key_exists( $taxonomy, $defaults ) ) {
                wp_set_object_terms( $post_id, $defaults[$taxonomy], $taxonomy );
            }
        }
    }
}
add_action( 'save_post', 'mfields_set_default_object_terms', 100, 2 );