WordPress Breadcrumbs Function Code

// the raw function on function php
if ( !function_exists( 'moderna_breadcrumbs' ) ) {
    function moderna_breadcrumbs() {
        $showOnHome = 0;
        $delimiter = '»';
        $home = 'Home';
        $showCurrent = 1;
        $before = '<span class="current">';
        $after = '</span>';

        global $post;
        $homelink = get_bloginfo('url');
        if ( is_home() || is_front_page() ) {
            if ( $showOnHome == 1 ) {
                echo '<div class="moderna-breadcrumb"><a href="' . $homelink . '">' . $home . '</a></div>';
            }
        } else {
            echo '<div class="moderna-breadcrumbs"><a href="' . $homelink . '">' . $home . '</a> ' . $delimiter . ' ';

            if ( is_category() ) {
                $thisCat = get_category(get_query_var('cat'), false);
                if ( $thisCat->parent != 0 ) {
                    echo get_category_parents( $thisCat->parent, true, ' ' . $delimiter . ' ' );
                } else {
                    echo $before . 'Archieve by category "' . single_cat_title( '', false ) . '"' . $after;
                }
            } elseif ( is_search() ) {
                echo $before . 'Search results for "' . get_search_query() . '"' . $after;
            } elseif ( is_day() ) {
                echo '<a href="' . get_year_link( get_the_time( 'Y' ) ) . '">' . get_the_time( 'Y' ) . '</a> ' . $delimiter . ' ';
                echo '<a href="' . get_month_link( get_the_time( 'Y' ), get_the_time( 'm' ) ) . '">' . get_the_time( 'F' ) . '</a> ' . $delimiter . ' ';
                echo $before . get_the_time( 'd' ) . $after;
            } elseif ( is_month() ) {
                echo '<a href="' . get_year_link( get_the_time( 'Y' ) ) . '">' . get_the_time( 'Y' ) . '</a> ' . $delimiter . ' ';
                echo $before . get_the_time( 'F' ) . $after;
            } elseif ( is_year() ) {
                echo $before . get_the_time( 'Y' ) . $after;
            } elseif ( is_single() && !is_attachment() ) {
                if ( get_post_type() != 'post' ) {
                    $post_type = get_post_type_object( get_post_type() );
                    $slug = $post_type->rewrite;
                    echo '<a href="' . $homelink . '/' . $slug['slug'] . '/">' . $post_type->labels->singular_name . '</a>';
                    if ( $showCurent == 1 ) {
                        echo ' ' . $delimiter . ' ' . $before . get_the_title() . $after;
                    }
                } else {
                    $cat = get_the_category();
                    $cat = $cat[0];
                    $cats = get_category_parents( $cat, true, ' ' . $delimiter . ' ' );
                    if ( $showCurrent == 0 ) {
                        $cats = preg_replace( "#^(.+)\s$delimiter\s$#", "$1", $cats );
                    }
                    echo $cats;
                    if ( $showCurrent == 1 ) {
                        echo $before . get_the_title() . $after;
                    }
                }
            } elseif ( !is_single() && !is_page() && get_post_type() != 'post' && !is_404() ) {
                $post_type = get_post_type_object( get_post_type() );
                echo $before . $post_type->labels->singualr_name . $after;
            } elseif ( is_attachment() ) {
                $parent = get_post( $post->post_parent );
                $cat = get_the_category( $parent->ID );
                $cat = $cat[0];
                echo get_category_parents( $cat, true, ' ' . $delimiter . ' ' );
                echo '<a href="' . get_permalink( $parent ) . '">' . $parent->post_title . '</a>';
                if ( $showCurrent == 1 ) {
                    echo ' ' . $delimiter . ' ' . $before . get_the_title() . $after;
                }
            } elseif ( is_page() && !$post->post_parent ) {
                if ( $showCurrent == 1 ) {
                    echo $before . get_the_title() . $after;
                }
            } elseif ( is_page() && $post->post_parent ) {
                $parent_id = $post->post_parent;
                $breadcrumbs = array();
                while ( $parent_id ) {
                    $page = get_page( $parent_id );
                    $breadcrumbs[] = '<a href="' . get_permalink( $page->ID ) . '">' . get_the_title( $page->ID ) . '</a>';
                    $parent_id = $page->post_parent;
                }
                $breadcrumbs = array_reverse( $breadcrumbs );
                for ( $i = 0;$i < count ( $breadcrumbs ); $i++ ) {
                    echo $breadcrumbs( $i );
                    if ( $i != count( $breadcrumbs-1 ) ) {
                        echo ' ' . $delimiter . ' ';
                    }
                }
                if ( $showCurrent == 1 ) {
                    echo ' ' . $delimiter . ' ' . $before . get_the_title() . $after;
                }
            } elseif ( is_tag() ) {
                echo $before . 'Posts tagged "' . single_tag_title( '', false ) . '"' . $after;
            } elseif ( is_author() ) {
                global $author;
                $userdata = get_userdata( $author );
                echo $before . 'Articles posted by ' . $userdata->display_name . $after;
            } elseif ( is_404() ) {
                echo $before . 'Error 404' . $after;
            }

            if ( get_query_var( 'paged' ) ) {
                if ( is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author() ) {
                    echo ' (';
                }
                echo __( 'Page' ) . ' ' . get_query_var( 'paged' );
                if ( is_category() || is_day() || is_month() || is_year() || is_search() || is_tag() || is_author() ) {
                    echo ')';
                }
            }

            echo '</div>';
        }
    }
}

// the trigger function on header php

if ( function_exists( 'moderna_breadcrumbs' ) ) { moderna_breadcrumbs(); }