希望显示添加到product_tag分类法中的图像（缩略图）
通过更改以下内容以使用标记，我能够成功将图片上传字段添加到后端的product_tag分类中：
https://pluginrepublic.com/adding-an-image-upload-field-to-categories/
<?php
/**
* ADD THUMNAIL IMAGE TO PRODUCT TAGS
**/
/**
* Plugin class
**/
if ( ! class_exists( 'CT_TAX_META' ) ) {
class CT_TAX_META {
public function __construct() {
//
}
/*
* Initialize the class and start calling our hooks and filters
* @since 1.0.0
*/
public function init() {
add_action( 'product_tag_add_form_fields', array ( $this, 'add_product_tag_image' ), 10, 2 );
add_action( 'created_product_tag', array ( $this, 'save_product_tag_image' ), 10, 2 );
add_action( 'product_tag_edit_form_fields', array ( $this, 'update_product_tag_image' ), 10, 2 );
add_action( 'edited_product_tag', array ( $this, 'updated_product_tag_image' ), 10, 2 );
add_action( 'admin_enqueue_scripts', array( $this, 'load_media' ) );
add_action( 'admin_footer', array ( $this, 'add_script' ) );
}
public function load_media() {
wp_enqueue_media();
}
/*
* Add a form field in the new product_tag page
* @since 1.0.0
*/
public function add_product_tag_image ( $taxonomy ) { ?>
<div class="form-field term-group">
<label for="product_tag-image-id"><?php _e('Image', 'hero-theme'); ?></label>
<input type="hidden" id="product_tag-image-id" name="product_tag-image-id" class="custom_media_url" value="">
<div id="product_tag-image-wrapper"></div>
<p>
<input type="button" class="button button-secondary ct_tax_media_button" id="ct_tax_media_button" name="ct_tax_media_button" value="<?php _e( 'Add Image', 'hero-theme' ); ?>" />
<input type="button" class="button button-secondary ct_tax_media_remove" id="ct_tax_media_remove" name="ct_tax_media_remove" value="<?php _e( 'Remove Image', 'hero-theme' ); ?>" />
</p>
</div>
<?php
}
/*
* Save the form field
* @since 1.0.0
*/
public function save_product_tag_image ( $term_id, $tt_id ) {
if( isset( $_POST['product_tag-image-id'] ) && '' !== $_POST['product_tag-image-id'] ){
$image = $_POST['product_tag-image-id'];
add_term_meta( $term_id, 'product_tag-image-id', $image, true );
}
}
/*
* Edit the form field
* @since 1.0.0
*/
public function update_product_tag_image ( $term, $taxonomy ) { ?>
<tr class="form-field term-group-wrap">
<th scope="row">
<label for="product_tag-image-id"><?php _e( 'Image', 'hero-theme' ); ?></label>
</th>
<td>
<?php $image_id = get_term_meta ( $term -> term_id, 'product_tag-image-id', true ); ?>
<input type="hidden" id="product_tag-image-id" name="product_tag-image-id" value="<?php echo $image_id; ?>">
<div id="product_tag-image-wrapper">
<?php if ( $image_id ) { ?>
<?php echo wp_get_attachment_image ( $image_id, 'thumbnail' ); ?>
<?php } ?>
</div>
<p>
<input type="button" class="button button-secondary ct_tax_media_button" id="ct_tax_media_button" name="ct_tax_media_button" value="<?php _e( 'Add Image', 'hero-theme' ); ?>" />
<input type="button" class="button button-secondary ct_tax_media_remove" id="ct_tax_media_remove" name="ct_tax_media_remove" value="<?php _e( 'Remove Image', 'hero-theme' ); ?>" />
</p>
</td>
</tr>
<?php
}
/*
* Update the form field value
* @since 1.0.0
*/
public function updated_product_tag_image ( $term_id, $tt_id ) {
if( isset( $_POST['product_tag-image-id'] ) && '' !== $_POST['product_tag-image-id'] ){
$image = $_POST['product_tag-image-id'];
update_term_meta ( $term_id, 'product_tag-image-id', $image );
} else {
update_term_meta ( $term_id, 'product_tag-image-id', '' );
}
}
/*
* Add script
* @since 1.0.0
*/
public function add_script() { ?>
<script>
jQuery(document).ready( function($) {
function ct_media_upload(button_class) {
var _custom_media = true,
_orig_send_attachment = wp.media.editor.send.attachment;
$('body').on('click', button_class, function(e) {
var button_id = '#'+$(this).attr('id');
var send_attachment_bkp = wp.media.editor.send.attachment;
var button = $(button_id);
_custom_media = true;
wp.media.editor.send.attachment = function(props, attachment){
if ( _custom_media ) {
$('#product_tag-image-id').val(attachment.id);
$('#product_tag-image-wrapper').html('<img class="custom_media_image" src="" style="margin:0;padding:0;max-height:100px;float:none;" />');
$('#product_tag-image-wrapper .custom_media_image').attr('src',attachment.url).css('display','block');
} else {
return _orig_send_attachment.apply( button_id, [props, attachment] );
}
}
wp.media.editor.open(button);
return false;
});
}
ct_media_upload('.ct_tax_media_button.button');
$('body').on('click','.ct_tax_media_remove',function(){
$('#product_tag-image-id').val('');
$('#product_tag-image-wrapper').html('<img class="custom_media_image" src="" style="margin:0;padding:0;max-height:100px;float:none;" />');
});
// Thanks: http://stackoverflow.com/questions/15281995/wordpress-create-product_tag-ajax-response
$(document).ajaxComplete(function(event, xhr, settings) {
var queryStringArr = settings.data.split('&');
if( $.inArray('action=add-tag', queryStringArr) !== -1 ){
var xml = xhr.responseXML;
$response = $(xml).find('term_id').text();
if($response!=""){
// Clear the thumb image
$('#product_tag-image-wrapper').html('');
}
}
});
});
</script>
<?php }
}
$CT_TAX_META = new CT_TAX_META();
$CT_TAX_META -> init();
}
我的产品标签已经过修改，可以支持层次结构，并且我还只能显示Woocommerce顶级product_tag，其中包含以下内容（有效但没有缩略图）
$taxonomy = 'product_tag'; //Choose the taxonomy
$terms = get_terms( $taxonomy ); //Get all the terms
foreach ($terms as $term) { //Cycle through terms, one at a time
// Check and see if the term is a top-level parent. If so, display it.
$parent = $term->parent;
if ( $parent=='0' ) {
$term_id = $term->term_id; //Define the term ID
$term_link = get_term_link( $term, $taxonomy ); //Get the link to the archive page for that term
$term_name = $term->name;
$slug = $term->slug;
$factwpslug = "/shop/?fwp_category=";
$distance = "&fwp_sort=distance";
echo '<li><a class="'. $slug . ' top-level-cat-nav" href="' . $factwpslug . $slug . $distance . '"><span class="label">' . $term_name . '</span></a></li>';
} }
现在，我正在尝试在前端显示已上传到ID为product_tag的每个product_tag-image-id的缩略图，如摘要所示。任何见识将不胜感激。
// Get the current category ID, e.g. if we're on a category archive page
$category = get_category( get_query_var( 'cat' ) );
$cat_id = $category->cat_ID;
// Get the image ID for the category
$image_id = get_term_meta ( $cat_id, 'category-image-id', true );
// Echo the image
echo wp_get_attachment_image ( $image_id, 'large' );
答案 0 :(得分：1)
您快到了。您只需要做两件事：
这是您的循环的更新版本，可完成这两件事。您可以更改wp_get_attachment_image()的第二个参数来更改图像大小。
$taxonomy = 'product_tag'; //Choose the taxonomy
$terms = get_terms( $taxonomy ); //Get all the terms
foreach ($terms as $term) { //Cycle through terms, one at a time
// Check and see if the term is a top-level parent. If so, display it.
$parent = $term->parent;
if ( $parent=='0' ) {
$term_id = $term->term_id; //Define the term ID
$term_link = get_term_link( $term, $taxonomy ); //Get the link to the archive page for that term
$term_name = $term->name;
$slug = $term->slug;
$factwpslug = "/shop/?fwp_category=";
$distance = "&fwp_sort=distance";
// Get the image ID here using the $term_id from above and the meta key you used to save the ID
$image_id = get_term_meta ( $term_id, 'product_tag-image-id', true );
// Use wp_get_attachment_image() to get the image HTML
echo '<li><a class="'. $slug . ' top-level-cat-nav" href="' . $factwpslug . $slug . $distance . '"><span class="label">' . $term_name . '</span>' . wp_get_attachment_image ( $image_id, 'large' ) . '</a></li>';
}
}