wordpress – Page 4

April 25, 2019

查询父级分类的子分类

<ul class="bigarea">
                <?php
               $terms = get_terms([
                   'taxonomy' => 'shop_area',
                   'hide_empty' => false,
                   'parent'=>0,
               ]);
   foreach( $terms as $term){?>
                    <li>
                        <figure>
                            <?php the_term_thumbnail($term ->term_id, 'post-thumbnail');?>
                            <figcaption>
                                <?php echo $term->name; ?>
                            </figcaption>
                        </figure>
                        <ul class="cityname">
                            <?php    
                             $taxonomy_name = 'shop_area';$termchildren = get_term_children( $term->term_id, $taxonomy_name );
                             foreach ( $termchildren as $child ) {
                                 $term = get_term_by( 'id', $child, $taxonomy_name );
                                 echo  '<li><a class="each-item" href="#'.$term->term_id.'">' . $term->name . '</a></li>';?>

                            <?php }?>
                        </ul>
                    </li>
                    <?php };?>
            </ul>

April 19, 2019December 4, 2019

WordPress自定义文章添加分类筛选

/*adding-a-taxonomy-filter-to-admin-list-for-a-custom-post-type*/
function todo_restrict_manage_posts() {
    global $typenow;
    $args=array( 'public' => true, '_builtin' => false,'name' => '' ); 
    $post_types = get_post_types($args);
    if ( in_array($typenow, $post_types) ) {
    $filters = get_object_taxonomies($typenow);
        foreach ($filters as $tax_slug) {
            $tax_obj = get_taxonomy($tax_slug);
            wp_dropdown_categories(array(
              'show_option_all' => __('Show All '.$tax_obj->label ),
                'taxonomy' => $tax_slug,
                'name' => $tax_obj->name,
                'orderby' => 'term_order',
                'selected' => $_GET[$tax_obj->query_var],
                'hierarchical' => $tax_obj->hierarchical,
                'show_count' => false,
                'hide_empty' => true
            ));
        }
    }
}
function todo_convert_restrict($query) {
    global $pagenow;
    global $typenow;
    if ($pagenow=='edit.php') {
        $filters = get_object_taxonomies($typenow);
        foreach ($filters as $tax_slug) {
            $var = &$query->query_vars[$tax_slug];
            if ( isset($var) ) {
                $term = get_term_by('id',$var,$tax_slug);
                $var = $term->slug;
            }
        }
    }
    return $query;
}
add_action( 'restrict_manage_posts', 'todo_restrict_manage_posts' );
add_filter('parse_query','todo_convert_restrict');


/*adding-metabox-filter-to-admin-list-for-a-custom-post-type*/
/*
**proavance used
*/
function wisdom_filter_tracked_plugins()
{
    global $typenow;
    $current_plugin = '';
    if (isset($_GET['slug'])) {
        $current_plugin = $_GET['slug'];
        $_GET['slug'] = "";
    }
    if ($typenow == 'products') {
        $args = array(
            'post_type' => 'product_labels',
            'posts_per_page' => -1,
            'orderby' => 'meta_value_num',
            'meta_key' => '_label_order_key',
            'order' => 'ASC',
            'tax_query' => array(
                array(
                    'taxonomy' => 'brands_category',
                    'field' => 'slug',
                    'terms' => 'products_brand',
                ),
            ),
        );
        $new_query = new WP_Query($args);
        if ($new_query->have_posts()) {
            ?>
            <select name="slug" id="slug">
                <option value="all" <?php selected('all', $current_plugin); ?>>All</option>
                <?php
                            while ($new_query->have_posts()) {
                                $new_query->the_post();
                                global $post;
                                $label_slug = get_post_meta($post->ID, '_label_slug_key', true);
                                ?>
                    <option value="<?php echo $label_slug; ?>" <?php selected($label_slug, $current_plugin); ?>>
                        <?php echo $label_slug; ?></option><?php
                                                                        }
                                                                    }
                                                                    ?>
            </select>
    <?php }
    }
function wisdom_sort_plugins_by_slug($query)
    {
        global $pagenow;
        // Get the post type
        $post_type = isset($_GET['post_type']) ? $_GET['post_type'] : '';
        if (is_admin() && $pagenow == 'edit.php' && $post_type == 'products' && isset($_GET['slug']) && $_GET['slug'] != 'all') {
            $query->query_vars['meta_key'] = '_brand_value_key';
            $query->query_vars['meta_value'] = $_GET['slug'];
            $query->query_vars['meta_compare'] = '=';
        }
        return $query;
    }
add_action('restrict_manage_posts', 'wisdom_filter_tracked_plugins'); 
add_filter('parse_query', 'wisdom_sort_plugins_by_slug');

January 4, 2019January 4, 2019

apply_filters()

apply_filters( string $tag, mixed $value );
创建过滤器。
$tag（字符串）（必须）过滤器的名字。
$value（混合）（必须）要过滤的值，如果没人过滤则直接返回这个值。

例：

<?php
echo apply_filters('the_content', '
');?>

December 26, 2018January 23, 2019

wordpress获取分类别名

function cat_slug(){
    $cat = get_query_var('cat');
$yourcat = get_category($cat);
return  $yourcat->slug;
}

$category = get_the_category(); echo ‘cat-‘.$category[0]->slug;

December 26, 2018December 26, 2018

category子父母模板

子模板与父级模板相同

function category_template($template){  
    $category = get_queried_object();  
    if($category->parent !='0'){  
        while($category->parent !='0'){  
            $category = get_category($category->parent);  
        }  
    }  
      
    $templates = array();  
  
    if ( $category ) {  
        $templates[] = "category-{$category->slug}.php";  
        $templates[] = "category-{$category->term_id}.php";  
    }  
    $templates[] = 'category.php';  
    return locate_template( $templates );  
}  
add_filter('category_template', 'category_template');

子模板与父级模板不同

function get_category_parent($parent)
{
global $cat;
$parent=get_category($cat);
if($parent->parent)return ture;
else
return false;
}

December 26, 2018January 9, 2019

data-client用法

<body <?php body_class(); ?> data-XXX="<?php if(wp_is_mobile()){ echo 'example';} ?>"></body>


body[data-XXX=example] {
    css:
}

September 20, 2018December 26, 2018

获取分类(cat&term)信息

WordPress get_terms()的使用方法：

例1.输出term相关信息

<ul class="products">
                <?php  $terms = get_terms('category',array(
    'with_thumbnail' => true,
    'hide_empty' => false,
)   );
if ( ! empty( $terms ) && ! is_wp_error( $terms ) ){
    foreach ( $terms as $term ) {?>
                <li>
                    <a href="<?php  echo get_term_link($term->term_id) ?>">
                        <div class="term-pic">
                            <?php the_term_thumbnail($term ->term_id, 'post-thumbnail');?>
                        </div>
                        <div>
                            <h3>
                                <?php echo $term->name;?>
                            </h3>
                            <div>
                                <?php echo $term->description;?>
                            </div>
                        </div>
                    </a>
                </li>
                <?php    }
}?>
            </ul>

例2.循环term显示相应的文章

        <?php
 $terms = get_terms([
    'taxonomy' => 'area',
    'hide_empty' => true,
]);
   foreach( $terms as $term):?>
            <div class="area-part">
                <h3>
                    <?php echo $term->name;  ?>
                </h3>
                <ul class="posts-list">
                    <?php
 $args = array(
    'post_type'=>'store',
    'tax_query' => array(
		array(
            'taxonomy' => 'area',
            'field' => 'id',
			'terms'    => $term->term_id,
		),
	),
    ); 
    $query = new WP_Query( $args );
    if( $query->have_posts()):
     while($query->have_posts()):$query->the_post();                         
get_template_part('partials/content','shopList');
//Restore orginial post Data
    wp_reset_postdata();  
    endwhile;?>
                </ul>
                <?php endif;?>
            </div>
            <?php endforeach;
    ?>

其他

get_terms()默认参数：

$get_terms_default_attributes = array (
            'taxonomy' => 'category', //empty string(''), false, 0 don't work, and return empty array
            'orderby' => 'name',
            'order' => 'ASC',
            'hide_empty' => true, //can be 1, '1' too
            'include' => 'all', //empty string(''), false, 0 don't work, and return empty array
            'exclude' => 'all', //empty string(''), false, 0 don't work, and return empty array
            'exclude_tree' => 'all', //empty string(''), false, 0 don't work, and return empty array
            'number' => false, //can be 0, '0', '' too
            'offset' => '',
            'fields' => 'all',
            'name' => '',
            'slug' => '',
            'hierarchical' => true, //can be 1, '1' too
            'search' => '',
            'name__like' => '',
            'description__like' => '',
            'pad_counts' => false, //can be 0, '0', '' too
            'get' => '',
            'child_of' => false, //can be 0, '0', '' too
            'childless' => false,
            'cache_domain' => 'core',
            'update_term_meta_cache' => true, //can be 1, '1' too
            'meta_query' => '',
            'meta_key' => array(),
            'meta_value'=> '',
    );

get_terms()数组返回值:

array(1) {
  [0]=&gt;
  object(WP_Term) (11) {
    ["term_id"]=&gt;  //int
    ["name"]=&gt;   //string 
    ["slug"]=&gt;  //string 
    ["term_group"]=&gt;  //int
    ["term_taxonomy_id"]=&gt; //int
    ["taxonomy"]=&gt;   //string
    ["description"]=&gt;    //string
    ["parent"]=&gt; //int
    ["count"]=&gt;  // int
    ["filter"]=&gt; //string
    ["meta"]=&gt; array(0) { // presumably this would be some returned meta-data?
    }
  }
}

June 20, 2018January 10, 2025

wordpress获取特色图片地址

function get_attachment($size, $id)

{

if (empty($size)) {

$size = ‘medium’;

}

$output = ”;

if (has_post_thumbnail($id)) {

$output = wp_get_attachment_image_url(get_post_thumbnail_id($id), $size);

} else {

$attachments = get_posts(array(

‘post_type’ => ‘attachment’,

‘numberposts’ => 1,

‘post_parent’ => $id,

‘post_mime_type’ => ‘image’,

));

if (!empty($attachments)) {

$output = wp_get_attachment_image_url($attachments[0]->ID, $size);

} else {

$output = get_template_directory_uri() . ‘/assets/img/default.jpg’;

}

return $output;

}

June 20, 2018

wordpress小工具

①注册

/* Register widget area*/
function theme_widgets_init() {
	register_sidebar( array(
		'name'          => __( 'Blog Sidebar', 'twentyseventeen' ),
		'id'            => 'sidebar-1',
		'description'   => __( 'Add widgets here to appear in your sidebar on blog posts and archive pages.', 'twentyseventeen' ),
		'before_widget' => '<section id="%1$s" class="widget %2$s">',
		'after_widget'  => '</section>',
		'before_title'  => '<h2 class="widget-title">',
		'after_title'   => '</h2>',
	) );
}
add_action( 'widgets_init', 'theme_widgets_init' );

②输出

<?php
if ( ! is_active_sidebar( 'sidebar-1' ) ) {
	return;
}
?>

<aside id="secondary" class="widget-area" role="complementary" aria-label="<?php esc_attr_e( 'Blog Sidebar', '' ); ?>">
	<?php dynamic_sidebar( 'sidebar-1' ); ?>
</aside><!-- #secondary -->