您可以通过访问默认类别IDdefault_category 选项：
$default_category = get_option(\'default_category\');
现在您可以使用
selected() 函数生成所选属性：
<?php
$args = array(
\'type\' => \'post\',
\'hide_empty\' => 0
);
$categories = get_categories( $args );
$default_category = get_option(\'default_category\');
?>
<select name="category_name">
<?php
foreach($categories as $category){
if ($category->name != \'Uncategorized\') {
if($action=="edit"){
$selected_category = get_the_category($post_id);
$selected_category = $selected_category[0]->cat_name;
if($category->name==$selected_category){
echo \'<option value="\'.$category->term_id.\'" selected> \'.$category->name.\'</option>\';
}else{
echo \'<option value="\'.$category->term_id.\'"> \'.$category->name.\'</option>\';
}
}else{
echo \'<option value="\'.$category->term_id.\'" \'. selected( $category->term_id, $default_category, false ) .\'> \'.$category->name.\'</option>\';
}
}
}
?>
也许你想用
wp_dropdown_categories, 这可以简化您的代码：
<?php
if( $action=="edit" ){
$selected_category = get_the_category( $post_id );
$selected_category = $selected_category[0]->term_id;
} else {
$selected_category = get_option(\'default_category\');
}
$args = array(
\'hide_empty\' => 0,
\'name\' => \'category_name\',
\'selected\' => $selected_category
);
wp_dropdown_categories( $args );
?>
