Question

全部，我有以下代码从Wordpress中选择一些类别：

$args = array(
    'type' => 'post',
    'hide_empty' => 0   
    );
$categories = get_categories( $args );

当我打印出数组时，我得到以下输出：

Array ( [0] => stdClass Object ( [term_id] => 4 [name] => Baseball [slug] => baseball [term_group] => 0 [term_taxonomy_id] => 4 [taxonomy] => category [description] => [parent] => 0 [count] => 29 [cat_ID] => 4 [category_count] => 29 [category_description] => [cat_name] => Baseball [category_nicename] => baseball [category_parent] => 0 ) [1] => stdClass Object ( [term_id] => 2 [name] => Football [slug] => football [term_group] => 0 [term_taxonomy_id] => 2 [taxonomy] => category [description] => [parent] => 0 [count] => 4 [cat_ID] => 2 [category_count] => 4 [category_description] => [cat_name] => Football [category_nicename] => football [category_parent] => 0 ) [2] => stdClass Object ( [term_id] => 1 [name] => Uncategorized [slug] => uncategorized [term_group] => 0 [term_taxonomy_id] => 1 [taxonomy] => category [description] => [parent] => 0 [count] => 21 [cat_ID] => 1 [category_count] => 21 [category_description] => [cat_name] => Uncategorized [category_nicename] => uncategorized [category_parent] => 0 ) )

这是我的foreach循环，用于显示数组的内容：

foreach($categories as $category){
    if ($category->name != 'Uncategorized') {
        echo '<option value="'.$category->term_id.'"> '.$category->name.'<option>';
    }
}

由于某种原因，foreach循环在具有值的选项之间添加了一个空白选项。这会是什么？

Answer 1

您需要将<option>替换为</option>：

foreach($categories as $category){
    if ($category->name != 'Uncategorized') {
        echo '<option value="'.$category->term_id.'"> '.$category->name.'</option>';
    }
}

HTML标记始终采用以下形式：

<foo>...</foo>

有一些不要求儿童元素或文字的例外情况：

<input>

或

<input/>

表格输出中的空白选择选项

1 个答案: