在WooCommerce中创建一个支持自定义增加和删除产品类目的插件，你可以按照以下步骤进行。这个插件将提供一个管理页面，允许用户添加和删除产品分类。
步骤1：创建插件的基础文件
首先，创建一个文件夹，例如custom-product-categories，并在其中创建一个主插件文件，例如custom-product-categories.php。
<?php
/*
Plugin Name: Custom Product Categories
Description: A plugin to add and remove custom product categories in WooCommerce.
Version: 1.0
Author: Your Name
*/
// Exit if accessed directly
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
// Hook to add admin menu
add_action( 'admin_menu', 'cpc_add_admin_menu' );
function cpc_add_admin_menu() {
add_menu_page(
'Custom Product Categories',
'Product Categories',
'manage_options',
'custom-product-categories',
'cpc_admin_page',
'dashicons-category',
20
);
}
// Admin page content
function cpc_admin_page() {
?>
<div class="wrap">
<h1>Custom Product Categories</h1>
<form method="post" action="admin-post.php">
<input type="hidden" name="action" value="add_category">
<?php wp_nonce_field( 'cpc_add_category_nonce', 'cpc_nonce' ); ?>
<table class="form-table">
<tr valign="top">
<th scope="row">Category Names</th>
<td>
<textarea name="cpc_category_names" rows="5" cols="50" required></textarea>
<p>Enter one category name per line.</p>
</td>
</tr>
<tr valign="top">
<th scope="row">Parent Category</th>
<td>
<select name="cpc_category_parent">
<option value="0">None</option>
<?php
$terms = get_terms( array(
'taxonomy' => 'product_cat',
'hide_empty' => false,
) );
function cpc_display_category_hierarchy($terms, $parent_id = 0, $level = 0) {
foreach ($terms as $term) {
if ($term->parent == $parent_id) {
echo '<option value="' . esc_attr($term->term_id) . '">' . str_repeat('—', $level) . ' ' . esc_html($term->name) . '</option>';
cpc_display_category_hierarchy($terms, $term->term_id, $level + 1);
}
}
}
cpc_display_category_hierarchy($terms);
?>
</select>
</td>
</tr>
</table>
<?php submit_button( 'Add Categories' ); ?>
</form>
<h2>Existing Categories</h2>
<form method="post" action="admin-post.php">
<input type="hidden" name="action" value="delete_categories">
<?php wp_nonce_field( 'cpc_delete_categories_nonce', 'cpc_nonce' ); ?>
<p><input type="checkbox" id="cpc_select_all"> Select All</p>
<ul id="cpc_category_list">
<?php
function cpc_display_category_list($terms, $parent_id = 0, $level = 0) {
foreach ($terms as $term) {
if ($term->parent == $parent_id) {
echo '<li data-term-id="' . esc_attr($term->term_id) . '" data-parent-id="' . esc_attr($parent_id) . '">' . str_repeat('—', $level) . ' <input type="checkbox" name="cpc_category_ids[]" value="' . esc_attr($term->term_id) . '" class="cpc_category_checkbox"> ' . esc_html($term->name);
cpc_display_category_list($terms, $term->term_id, $level + 1);
echo '</li>';
}
}
}
cpc_display_category_list($terms);
?>
</ul>
<?php submit_button( 'Delete Selected Categories' ); ?>
</form>
</div>
<script type="text/javascript">
document.addEventListener('DOMContentLoaded', function() {
const selectAllCheckbox = document.getElementById('cpc_select_all');
const categoryCheckboxes = document.querySelectorAll('.cpc_category_checkbox');
const categoryListItems = document.querySelectorAll('#cpc_category_list li');
// Select/Deselect all checkboxes
selectAllCheckbox.addEventListener('change', function() {
categoryCheckboxes.forEach(checkbox => {
checkbox.checked = this.checked;
});
});
// Function to recursively check/uncheck child checkboxes
function checkUncheckChildren(parentId, checked) {
categoryListItems.forEach(item => {
if (item.dataset.parentId === parentId) {
const checkbox = item.querySelector('.cpc_category_checkbox');
checkbox.checked = checked;
checkUncheckChildren(item.dataset.termId, checked); // Recurse for nested children
}
});
}
// Add event listeners to each category checkbox
categoryCheckboxes.forEach(checkbox => {
checkbox.addEventListener('change', function() {
const parentId = this.closest('li').dataset.termId;
checkUncheckChildren(parentId, this.checked);
});
});
});
</script>
<?php
}
// Handle category addition
add_action( 'admin_post_add_category', 'cpc_add_category' );
function cpc_add_category() {
if ( ! current_user_can( 'manage_options' ) || ! isset( $_POST['cpc_nonce'] ) || ! wp_verify_nonce( $_POST['cpc_nonce'], 'cpc_add_category_nonce' ) ) {
wp_die( 'Unauthorized user or invalid nonce' );
}
$category_names = explode( "\n", sanitize_textarea_field( $_POST['cpc_category_names'] ) );
$category_parent = intval( $_POST['cpc_category_parent'] );
foreach ( $category_names as $category_name ) {
$category_name = trim( $category_name );
if ( ! empty( $category_name ) ) {
wp_insert_term( $category_name, 'product_cat', array( 'parent' => $category_parent ) );
}
}
wp_redirect( admin_url( 'admin.php?page=custom-product-categories' ) );
exit;
}
// Handle category deletion
add_action( 'admin_post_delete_categories', 'cpc_delete_categories' );
function cpc_delete_categories() {
if ( ! current_user_can( 'manage_options' ) || ! isset( $_POST['cpc_nonce'] ) || ! wp_verify_nonce( $_POST['cpc_nonce'], 'cpc_delete_categories_nonce' ) ) {
wp_die( 'Unauthorized user or invalid nonce' );
}
if ( isset( $_POST['cpc_category_ids'] ) && is_array( $_POST['cpc_category_ids'] ) ) {
foreach ( $_POST['cpc_category_ids'] as $term_id ) {
$term_id = intval( $term_id );
if ( $term_id > 0 ) {
wp_delete_term( $term_id, 'product_cat' );
}
}
}
wp_redirect( admin_url( 'admin.php?page=custom-product-categories' ) );
exit;
}
?>
将插件文件夹上传到WordPress的wp-content/plugins/目录。在WordPress后台激活插件。访问WordPress后台的“Product Categories”页面，应该可以看到新增和删除产品分类的功能。