[Plugin: WordPress SEO by Yoast] Replace variables

I did not find a mention anywhere of what var templates are available for titles, descriptions, etc. So, I made a list myself. Next to the template you will see the PHP logic being used to replace it with a value.

%%sep%%
%%sitename%%
%%sitedesc%%
%%currenttime%%
%%currentdate%%
%%currentmonth%%
%%currentyear%%

%%date%% $date,
%%title%% stripslashes( $r->post_title ),
%%excerpt%% ( !empty( $r->post_excerpt ) ) ? strip_tags( $r->post_excerpt ) : substr( strip_shortcodes( strip_tags( $r->post_content ) ), 0, 155 ),
%%excerpt_only%% strip_tags( $r->post_excerpt ),
%%category%% wpseo_get_terms( $r->ID, ‘category’ ),
%%category_description%% !empty( $r->taxonomy ) ? trim( strip_tags( get_term_field( ‘description’, $r->term_id, $r->taxonomy ) ) ) : ”,
%%tag_description%% !empty( $r->taxonomy ) ? trim( strip_tags( get_term_field( ‘description’, $r->term_id, $r->taxonomy ) ) ) : ”,
%%term_description%% !empty( $r->taxonomy ) ? trim( strip_tags( get_term_field( ‘description’, $r->term_id, $r->taxonomy ) ) ) : ”,
%%term_title%% $r->name,
%%focuskw%% wpseo_get_value( ‘focuskw’, $r->ID ),
%%tag%% wpseo_get_terms( $r->ID, ‘post_tag’ ),
%%modified%% mysql2date( get_option( ‘date_format’ ), $r->post_modified ),
%%id%% $r->ID,
%%name%% get_the_author_meta( ‘display_name’, !empty( $r->post_author ) ? $r->post_author : get_query_var( ‘author’ ) ),
%%userid%% !empty( $r->post_author ) ? $r->post_author : get_query_var( ‘author’ ),
%%searchphrase%% esc_html( get_query_var( ‘s’ ) ),
%%page%% ( $max_num_pages > 1 && $pagenum > 1 ) ? sprintf( $sep . ‘ ‘ . __( ‘Page %d of %d’, ‘wordpress-seo’ ), $pagenum, $max_num_pages ) : ”,
%%pagetotal%% $max_num_pages,
%%pagenumber%% $pagenum,
%%caption%% $r->post_excerpt,

http://ww.wp.xz.cn/extend/plugins/wordpress-seo/