WordPress给文章目录添加自定义字段

本代码演示，如何给分类目录添加新字段，并且调用

新建分类页面，添加新字段

<?php
// Add term page
function tutorialshares_taxonomy_add_new_meta_field() {
// this will add the custom meta field to the add new term page
?>
<div class="form-field">
<label for="term_meta[custom_term_meta]"><?php _e( 'Example meta field', 'tutorialshares' ); ?></label>
<input type="text" name="term_meta[custom_term_meta]" id="term_meta[custom_term_meta]" value="">
<p class="description"><?php _e( 'Enter a value for this field','tutorialshares' ); ?></p>
</div>
<?php
}
add_action( 'category_add_form_fields', 'tutorialshares_taxonomy_add_new_meta_field', 10, 2 );

您可以调整第一个参数{taxonomy_name}_add_form_fields以设置将字段添加到的分类法。在我的示例中，我将使用“类别”分类法。

编辑分类页面添加字段

<?php
// Edit term page
function tutorialshares_taxonomy_edit_meta_field($term) {

// put the term ID into a variable
$t_id = $term->term_id;

// retrieve the existing value(s) for this meta field. This returns an array
$term_meta = get_option( "taxonomy_$t_id" ); ?>
<tr class="form-field">
<th scope="row" valign="top"><label for="term_meta[custom_term_meta]"><?php _e( 'Example meta field', 'tutorialshares' ); ?></label></th>
<td>
<input type="text" name="term_meta[custom_term_meta]" id="term_meta[custom_term_meta]" value="<?php echo esc_attr( $term_meta['custom_term_meta'] ) ? esc_attr( $term_meta['custom_term_meta'] ) : ''; ?>">
<p class="description"><?php _e( 'Enter a value for this field','tutorialshares' ); ?></p>
</td>
</tr>
<?php
}
add_action( 'category_edit_form_fields', 'tutorialshares_taxonomy_edit_meta_field', 10, 2 );

保存数据

// Save extra taxonomy fields callback function.
function save_taxonomy_custom_meta( $term_id ) {
if ( isset( $_POST['term_meta'] ) ) {
$t_id = $term_id;
$term_meta = get_option( "taxonomy_$t_id" );
$cat_keys = array_keys( $_POST['term_meta'] );
foreach ( $cat_keys as $key ) {
if ( isset ( $_POST['term_meta'][$key] ) ) {
$term_meta[$key] = $_POST['term_meta'][$key];
}
}
// Save the option array.
update_option( "taxonomy_$t_id", $term_meta );
}
} 
add_action( 'edited_category', 'save_taxonomy_custom_meta', 10, 2 ); 
add_action( 'create_category', 'save_taxonomy_custom_meta', 10, 2 );

调用数据

$metafieldArray = get_option('taxonomy_'. $term->term_id);
$metafieldoutput = $metafieldArray['custom_term_meta'];
echo $metafieldoutput;