<?php
/***********************************************************************
* @Author: Boutros AbiChedid 
* @Date:   February 14, 2011
* @Copyright: Boutros AbiChedid (http://bacsoftwareconsulting.com/)
* @Licence: Feel free to use it and modify it to your needs but keep the 
* Author's credit. This code is provided 'as is' without any warranties.
* @Function Name:  wp_bac_breadcrumb()
* @Version:  1.0 -- Tested up to WordPress version 3.1.2
* @Description: WordPress Breadcrumb navigation function. Adding a 
* breadcrumb trail to the theme without a plugin.
* This code does not support multi-page split numbering, attachments,
* custom post types and custom taxonomies.
***********************************************************************/

function wp_bac_breadcrumb() {   
	//Variable (symbol >> encoded) and can be styled separately.
	//Use >> for different level categories (parent >> child >> grandchild)
            $delimiter = '<span class="delimiter"> &raquo; </span>'; 
	//Use bullets for same level categories ( parent . parent )
	$delimiter1 = '<span class="delimiter1"> &bull; </span>';
    
	//text link for the 'Home' page
            $main = 'Home';  
	//Display only the first 30 characters of the post title.
            $maxLength= 30;
	
	//variable for archived year 
	$arc_year = get_the_time('Y'); 
	//variable for archived month 
	$arc_month = get_the_time('F');	
	//variables for archived day number + full
	$arc_day = get_the_time('d');
	$arc_day_full = get_the_time('l');	
	
	//variable for the URL for the Year
	$url_year = get_year_link($arc_year);
	//variable for the URL for the Month	
	$url_month = get_month_link($arc_year,$arc_month);

	/*is_front_page(): If the front of the site is displayed, whether it is posts or a Page. This is true 
	when the main blog page is being displayed and the 'Settings > Reading ->Front page displays' 
	is set to "Your latest posts", or when 'Settings > Reading ->Front page displays' is set to 
	"A static page" and the "Front Page" value is the current Page being displayed. In this case 
	no need to add breadcrumb navigation. is_home() is a subset of is_front_page() */
	
    //Check if NOT the front page (whether your latest posts or a static page) is displayed. Then add breadcrumb trail.
	if (!is_front_page()) { 		
		//If Breadcrump exists, wrap it up in a div container for styling. 
		//You need to define the breadcrumb class in CSS file.
		echo '<div class="breadcrumb">';
		
        //global WordPress variable $post. Needed to display multi-page navigations. 
		global $post, $cat; 		
		//A safe way of getting values for a named option from the options database table. 
 	    $homeLink = get_option('home'); //same as: $homeLink = get_bloginfo('url');
        //If you don't like "You are here:", just remove it.
 	    echo 'You are here: <a href="' . $homeLink . '">' . $main . '</a>' . $delimiter;	
		
		//Display breadcrumb for single post
		if (is_single()) { //check if any single post is being displayed.			
			//Returns an array of objects, one object for each category assigned to the post.
			//This code does not work well (wrong delimiters) if a single post is listed 
			//at the same time in a top category AND in a sub-category. But this is highly unlikely.
			$category = get_the_category();
			$num_cat = count($category); //counts the number of categories the post is listed in.
			
			//If you have a single post assigned to one category.
			//If you don't set a post to a category, WordPress will assign it a default category.
			if ($num_cat <=1)  //I put less or equal than 1 just in case the variable is not set (a catch all).
			{
				echo get_category_parents($category[0],  true,' ' . $delimiter . ' ');
				//Display the full post title.
				echo ' ' . get_the_title(); 
			}
			//then the post is listed in more than 1 category.	
			else { 
				//Put bullets between categories, since they are at the same level in the hierarchy.
				echo the_category( $delimiter1, multiple); 
					//Display partial post title, in order to save space.
					if (strlen(get_the_title()) >= $maxLength) { //If the title is long, then don't display it all.
						echo ' ' . $delimiter . trim(substr(get_the_title(), 0, $maxLength)) . ' ...';
					}                         
					else { //the title is short, display all post title.
						echo ' ' . $delimiter . get_the_title(); 
					} 
			}			
		} 
		//Display breadcrumb for category and sub-category archive
		elseif (is_category()) { //Check if Category archive page is being displayed.
			//returns the category title for the current page. 
			//If it is a subcategory, it will display the full path to the subcategory. 
			//Returns the parent categories of the current category with links separated by '»'
			echo 'Archive Category: "' . get_category_parents($cat, true,' ' . $delimiter . ' ') . '"' ;
		}		
		//Display breadcrumb for tag archive 		
		elseif ( is_tag() ) { //Check if a Tag archive page is being displayed.
      		//returns the current tag title for the current page. 
			echo 'Posts Tagged: "' . single_tag_title("", false) . '"';
    	}		 
		//Display breadcrumb for calendar (day, month, year) archive
		elseif ( is_day()) { //Check if the page is a date (day) based archive page.
     		echo '<a href="' . $url_year . '">' . $arc_year . '</a> ' . $delimiter . ' ';
     		echo '<a href="' . $url_month . '">' . $arc_month . '</a> ' . $delimiter . $arc_day . ' (' . $arc_day_full . ')';
    	} 
		elseif ( is_month() ) {  //Check if the page is a date (month) based archive page.
      		echo '<a href="' . $url_year . '">' . $arc_year . '</a> ' . $delimiter . $arc_month;
    	} 
		elseif ( is_year() ) {  //Check if the page is a date (year) based archive page.
     		echo $arc_year;
    	}		
		//Display breadcrumb for search result page
		elseif ( is_search() ) {  //Check if search result page archive is being displayed. 
      		echo 'Search Results for: "' . get_search_query() . '"';
 		}		
		//Display breadcrumb for top-level pages (top-level menu)
		elseif ( is_page() && !$post->post_parent ) { //Check if this is a top Level page being displayed.
      		echo get_the_title();
  	 	}			
		//Display breadcrumb trail for multi-level subpages (multi-level submenus)
	 	elseif ( is_page() && $post->post_parent ) {  //Check if this is a subpage (submenu) being displayed.
			//get the ancestor of the current page/post_id, with the numeric ID 
			//of the current post as the argument. 
			//get_post_ancestors() returns an indexed array containing the list of all the parent categories.				 
			$post_array = get_post_ancestors($post);
			
			//Sorts in descending order by key, since the array is from top category to bottom.
			krsort($post_array); 
			
			//Loop through every post id which we pass as an argument to the get_post() function. 
			//$post_ids contains a lot of info about the post, but we only need the title. 
			foreach($post_array as $key=>$postid){
				//returns the object $post_ids
				$post_ids = get_post($postid);
				//returns the name of the currently created objects 
				$title = $post_ids->post_title; 
				//Create the permalink of $post_ids
				echo '<a href="' . get_permalink($post_ids) . '">' . $title . '</a>' . $delimiter;
			}
			the_title(); //returns the title of the current page.			 	
		}			
		//Display breadcrumb for author archive   
		elseif ( is_author() ) {//Check if an Author archive page is being displayed.
       		global $author;
	  		//returns the user's data, where it can be retrieved using member variables. 
      		$user_info = get_userdata($author);
     		echo  'Archived Article(s) by Author: ' . $user_info->display_name ;
		}		
		//Display breadcrumb for 404 Error 
		elseif ( is_404() ) {//checks if 404 error is being displayed 
     	 	echo  'Error 404 - Not Found.';
		}		
		else {
			//All other cases that I missed. No Breadcrumb trail.
		}
       echo '</div>';	 	
 	}	
}
?>

<?php 
	//function_exists() — Return TRUE if the given function has been defined.
	//code by BOUTROS ABICHEDID. Adding breadcrumb trail to the WordPress theme.
	if (function_exists('wp_bac_breadcrumb')) {wp_bac_breadcrumb();} 
?>

/* Styling Breacrumb Navigation by BOUTROS ABICHEDID */
.breadcrumb{
	width:645px;
	float:left;
	padding:0 0 0 47px;
	margin:9px 0 0 0;
	font-size:90%;
	clear:both;
}
.delimiter{
	color:#000;
	background-color:inherit;
}
.delimiter1{
	color: #627FC3;
	background-color:inherit;
}