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header.php
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<?php
/**
* The header for our theme
*
* This is the template that displays all of the <head> section and everything up until <div id="content">
*
* @link https://developer.wordpress.org/themes/basics/template-files/#template-partials
*
* @package WordPress
* @subpackage Frenemy
* @since 1.0.0
*/
$description = '';
$keywords = '';
if ( is_home() || is_page() ) {
// 将以下引号中的内容改成你的主页description
$description = get_theme_mod( 'seo_description' );
// 将以下引号中的内容改成你的主页keywords
$keywords = get_theme_mod( 'seo_keywords' );
} elseif ( is_single() ) {
$description1 = get_post_meta( $post->ID, "description", true );
$description2 = str_replace( "\n", "", dm_strimwidth( strip_tags( $post->post_content ), 0, 200, "…", 'utf-8' ) );
// 填写自定义字段description时显示自定义字段的内容，否则使用文章内容前200字作为描述
$description = $description1 ? $description1 : $description2;
// 填写自定义字段keywords时显示自定义字段的内容，否则使用文章tags作为关键词
$keywords = get_post_meta( $post->ID, "keywords", true );
if ( $keywords == '' ) {
$tags = wp_get_post_tags( $post->ID );
foreach ( $tags as $tag ) {
$keywords = $keywords . $tag->name . ", ";
}
$keywords = rtrim( $keywords, ', ' );
}
} elseif ( is_category() ) {
// 分类的description可以到后台 - 文章 -分类目录，修改分类的描述
$description = category_description();
$keywords = single_cat_title( '', false );
} elseif ( is_tag() ) {
// 标签的description可以到后台 - 文章 - 标签，修改标签的描述
$description = tag_description();
$keywords = single_tag_title( '', false );
}
$description = trim( strip_tags( $description ) );
$keywords = trim( strip_tags( $keywords ) );
?>
<!DOCTYPE html>
<html <?php language_attributes(); ?>>
<head>
<meta charset="<?php bloginfo( 'charset' ); ?>"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<meta name="description" content="<?php echo $description; ?>"/>
<meta name="keywords" content="<?php echo $keywords; ?>"/>
<link rel="profile" href="https://gmpg.org/xfn/11"/>
<?php wp_head(); ?>
</head>
<body <?php body_class(); ?>>
<?php wp_body_open(); ?>
<div class="site-warp">
<header class="site-header fixed-top" style="top: auto;list-style: none">
<nav class="navbar navbar-expand-md navbar-dark">
<div class="container">
<a class="navbar-brand" href="<?php echo esc_url( home_url( '/' ) ); ?>"><?php bloginfo( 'name' ); ?></a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="<?php esc_attr_e( '顶部菜单' ); ?>">
<span class="navbar-toggler-icon"></span>
</button>
<?php
wp_nav_menu(
array(
'theme_location' => 'menu-top',
'menu_class' => 'navbar-nav ml-auto',
'depth' => 1, // 1 = no dropdowns, 2 = with dropdowns.
'container' => 'div',
'container_class' => 'collapse navbar-collapse',
'container_id' => 'navbarSupportedContent',
'fallback_cb' => 'WP_Bootstrap_Navwalker::fallback',
'walker' => new WP_Bootstrap_Navwalker()
)
);
?>
<li class="nav-item m-0 d-none d-md-block d-lg-block d-xl-block">
<div class="site-searchbar">
<label for="nav-top-search"></label>
<input id="nav-top-search" class="search-input" type="text" placeholder="Search...">
<a class="search-icon"><i class="fas fa-search"></i></a>
</div>
</li>
<li class="nav-item d-block d-md-none d-lg-none d-xl-none">
<form class="mobile-search">
<div class="input-group">
<input type="text" class="mobile-search-input form-control" placeholder="Search..." aria-label="Search Input">
</div>
</form>
</li>
<li class="nav-item">
<label class="dark-switch-label" for="darkSwitch">
<a class="dark-switch-label-span" data-toggle="tooltip" data-placement="bottom" title="日夜模式">
<i class="fas fa-sun"></i>
</a>
</label>
<input type="checkbox" class="custom-control-input" id="darkSwitch">
</li>
</div>
</nav>
</header>