Detect the page type (post, archive, etc..) of WordPress content.

wordpress-page-type.php

<?php

//Determine the wordpress page type
function detectPageType() {
  
  if ( is_front_page() && get_option('show_on_front') == 'posts' ) {
    $pageType =  'front-page';
  } else if ( is_home() && get_option('show_on_front') == 'page' ) {
    $pageType =  'front-page';
  } else if ( is_attachment() ) {
    $pageType =  'attachment';					// must be before is_single(), otherwise detects as 'single'
  } else if ( is_single() ) {
    $pageType =  'single';
  } else if ( is_page() ) {
    $pageType =  'page';
  } else if ( is_author() ) {
    $pageType =  'author';
  } else if ( is_category() ) {
    $pageType =  'category';
  } else if ( is_tag() ) {
    $pageType =  'tag';
  } else if ( function_exists('is_post_type_archive') && is_post_type_archive() ) {
    $pageType =  'cp_archive';				// must be before is_archive(), otherwise detects as 'archive' in WP 3.1.0
  } else if ( function_exists('is_tax') && is_tax() ) {
    $pageType =  'tax_archive';
  } else if ( is_archive() && ! is_category() && ! is_author() && ! is_tag() ) {
    $pageType =  'archive';
  } else if ( function_exists('bbp_is_single_user') && (bbp_is_single_user() || bbp_is_single_user_edit()) ) {	// must be before is_404(), otherwise bbPress profile page is detected as 'e404'.
    $pageType =  'bbp_profile';
  } else if ( is_404() ) {
    $pageType =  'e404';
  } else if ( is_search() ) {
    $pageType =  'search';
  } else if ( function_exists('is_pod_page') && is_pod_page() ) {
    $pageType =  'pods';
  } else {
    $pageType =  'undefined';
  }
  
  //echo  'Page Type: ' . $pageType;
  return $pageType;
}

add_action('wp_head','detectPageType');