wp_title 函數(shù)在 WordPress 中是用來顯示文章、頁面、分類等等等等標題的一個函數(shù)，但在首頁索引，該函數(shù)將不顯示任何的東西。該函數(shù)在 WordPress 官方主題中一直被使用，但目前很多定制的主題中這個函數(shù)總是為忽視。函數(shù)意義詳解 wp_title 函數(shù)用來顯示頁面的標題，如在文章頁面，則顯示文章標題；在分類頁面，則顯示分類名稱，但在首頁索引，該函數(shù)將不顯示任何的東西。 有點像 WordPress 中的 get_the_title 和 single_cat_title()這兩個函數(shù)的自適應(yīng)用法（自動判斷是頁面、文章還是分類、歸檔、標簽）。函數(shù)聲明 有點長，希望您能耐心看一遍，哪怕只有那么一遍。 * Display or retrieve page title for all areas of blog. * By default, the page title will display the separator before the page title, * so that the blog title will be before the page title. This is not good for * title display, since the blog title shows up on most tabs and not what is * important, which is the page that the user is looking at. * There are also SEO benefits to having the blog title after or to the 'right' * or the page title. However, it is mostly common sense to have the blog title * to the right with most browsers supporting tabs. You can achieve this by * using the seplocation parameter and setting the html' target='_blank'>value to 'right'. This change * was introduced around 2.5.0, in case backwards compatibility of themes is * important. * @since 1.0.0 * @param string $sep Optional, default is ' '. How to separate the various items within the page title. * @param bool $display Optional, default is true. Whether to display or retrieve title. * @param string $seplocation Optional. Direction to display title, 'right'. * @return string|null String on retrieve, null when displaying.function wp_title($sep = ' ', $display = true, $seplocation = '') {global $wpdb, $wp_locale;$m = get_query_var('m');$year = get_query_var('year');$monthnum = get_query_var('monthnum');$day = get_query_var('day');$search = get_query_var('s');$title = '';$t_sep = '%WP_TITILE_SEP%'; // Temporary separator, for accurate flipping, if necessary// If there is a postif ( is_single() || ( is_home() && !is_front_page() ) || ( is_page() && !is_front_page() ) ) { $title = single_post_title( '', false );// If there's a category or tagif ( is_category() || is_tag() ) { $title = single_term_title( '', false );// If there's a taxonomyif ( is_tax() ) { $term = get_queried_object(); $tax = get_taxonomy( $term- taxonomy ); $title = single_term_title( $tax- labels- name . $t_sep, false );// If there's an authorif ( is_author() ) { $author = get_queried_object(); $title = $author- display_name;// If there's a post type archiveif ( is_post_type_archive() ) $title = post_type_archive_title( '', false );// If there's a monthif ( is_archive() && !empty($m) ) { $my_year = substr($m, 0, 4); $my_month = $wp_locale- get_month(substr($m, 4, 2)); $my_day = intval(substr($m, 6, 2)); $title = $my_year . ( $my_month $t_sep . $my_month : '' ) . ( $my_day $t_sep . $my_day : '' );// If there's a yearif ( is_archive() && !empty($year) ) { $title = $year; if ( !empty($monthnum) ) $title .= $t_sep . $wp_locale- get_month($monthnum); if ( !empty($day) ) $title .= $t_sep . zeroise($day, 2);// If it's a searchif ( is_search() ) { /* translators: 1: separator, 2: search phrase */$title = sprintf(__('Search Results %1$s %2$s'), $t_sep, strip_tags($search));// If it's a 404 pageif ( is_404() ) { $title = __('Page not found');$prefix = '';if ( !empty($title) ) $prefix = " $sep ";// Determines position of the separator and direction of the breadcrumbif ( 'right' == $seplocation ) { // sep on right, so reverse the order$title_array = explode( $t_sep, $title );$title_array = array_reverse( $title_array );$title = implode( " $sep ", $title_array ) . $prefix;} else { $title_array = explode( $t_sep, $title ); $title = $prefix . implode( " $sep ", $title_array );$title = apply_filters('wp_title', $title, $sep, $seplocation);// Send it out if ( $display ) echo $title; else return $title;用法 php wp_title( $sep, $echo, $seplocation ); 參數(shù)詳解 $sep：分隔符； $echo：是否顯示； $seplocation：分隔符所在位置（左還是右，只接受'right',如果不是right自動判定為左）總結(jié)WordPress 中相同功能的函數(shù)有很多，都是從基層到高級不斷的經(jīng)過封裝最后到達使用層的，當然如果我們需要一些靈活用法的話，我們可以直接用中間那層的函數(shù)，如果我們懶的話我們可以直接使用最高級的那層函數(shù)，諸如本函數(shù) wp_title ，其實這個函數(shù)我們從源代碼來看， wp 替我們針對 分類、標簽、文章、歸檔、作者、頁面等多種類型的頁面進行了判斷，并根據(jù)不同頁面調(diào)用不同的標題函數(shù)來達到目的。 如果有時間，您可以對下面幾個函數(shù)進行深入研究一下，一遍更靈活的進行seo single_post_title 文章頁面提取標題的函數(shù) single_term_title tag（標簽）、cat（分類）、日期、提取標題的函數(shù) 類似于 single_cat_title()函數(shù) get_queried_object 作者頁面提取對象的函數(shù)（對象中有作者名） post_type_archive_title（）規(guī)檔等等提取標題的函數(shù) 還等什么？ GO GO GO !PHP教程
