Php 如何使用wordpress在前端动态回显所选的后端类别

我在functions.php中使用了

//Example of select field
    $this->settings['select'] = array(
        'section' => 'general',
        'title'   => __( 'Example Select' ),
        'desc'    => __( 'This is a description for the drop-down.' ),
        'type'    => 'select',
        'std'     => '',
        'choices' => array(
            'choice1' => 'Choice 1',
            'choice2' => 'Choice 2',
            'choice3' => 'Choice 3'
        )
    );

//Here i have managed to echo the categories dynamically in the back-end
$args = array(
            'orderby' => 'name',
            'order' => 'ASC',
            'hide_empty' => 0
        );
$categories = get_categories($args);
$categories_name = array();
foreach($categories as $category){
   $categories_name[] = $category->name;
}

    $this->settings['categoriesmain1'] = array(
          'section' => 'general',
          'title'   => __( 'Select Left Block Category' ),
          'desc'    => __( 'Here you can select the main category for main left block.' ),
          'type'    => 'select',
          'std'     => '',
          'choices' =>  $categories_name // this returns the category names in a select field
        );
    $settings = get_option('mytheme_options');
    $my_choices_cat1  = $settings['categoriesmain1'];

    $this->settings['categoriesmain2'] = array(
          'section' => 'general',
          'title'   => __( 'Select Center Block Category' ),
          'desc'    => __( 'Here you can select the main category for main center block.' ),
          'type'    => 'select',
          'std'     => '',
          'choices' =>  $categories_name
        );
    $settings = get_option('mytheme_options');
    $my_choices_cat2  = $settings['categoriesmain2'];

    $this->settings['categoriesmain3'] = array(
          'section' => 'general',
          'title'   => __( 'Select Right Block Category' ),
          'desc'    => __( 'Here you can select the main category for main right block.' ),
          'type'    => 'select',
          'std'     => '',
          'choices' =>  $categories_name
        );
    $settings = get_option('mytheme_options');
    $my_choices_cat3  = $settings['categoriesmain3'];

index.php

   <?php $settings = get_option('mytheme_options');
        query_posts('category_name='.$settings["categoriesmain1"].'&posts_per_page=1');
while ( have_posts() ) : the_post(); ?>
     <div class="boxes-third boxes-first">
        <div class="boxes-padding"> 
            <div class="bti">
                <div class="featured-images"><?php the_post_thumbnail(array(300,300)); ?></div>
                <div class="featured-titles"><?php echo get_the_title($post->ID); ?></div>
            </div>
            <div class="featured-text"><?php the_content('',FALSE,''); ?></div>
        </div>
        <span class="box-arrow"></span>
    </div>
    <?php endwhile; ?>
    <?php wp_reset_query(); ?>

   <?php $settings = get_option('mytheme_options');
         query_posts('category_name='.$settings["categoriesmain2"].'&posts_per_page=1');
while ( have_posts() ) : the_post(); ?>
    <div class="boxes-third">
        <div class="boxes-padding">
            <div class="bti">
                <div class="featured-images"><?php the_post_thumbnail(array(300,300)); ?></div>
                <div class="featured-titles"><?php echo get_the_title($post->ID); ?></div>
            </div>
            <div class="featured-text"><?php the_content('',FALSE,''); ?></div>
        </div>
        <span class="box-arrow"></span>
    </div>
    <?php endwhile; ?>
    <?php wp_reset_query(); ?>

   <?php $settings = get_option('mytheme_options');
         query_posts('category_name='.$settings["categoriesmain3"].'&posts_per_page=1');
while ( have_posts() ) : the_post(); ?>
    <div class="boxes-third boxes-last">
        <div class="boxes-padding">
            <div class="bti">
                <div class="featured-images"><?php the_post_thumbnail(array(300,300)); ?></div>
                <div class="featured-titles"><?php echo get_the_title($post->ID); ?></div>
            </div>
            <div class="featured-text"><?php the_content('',FALSE,''); ?></div>
        </div>
        <span class="box-arrow"></span>
    </div>
   <?php endwhile; ?>
   <?php wp_reset_query(); ?>

如果我添加

var\u dump

或

print\u r

，它将回显类似于Array{}（空数组）的内容，而不是回显类别名称

  query_posts('category_name=Category3&posts_per_page=1'); 

其中，

Category3

是用户从后端选择的类别。 我的functions.txt是 请帮助我，我正在尽全力学习wordpress

---

啊，我把它放在了我应该扔掉的地方，现在我把它扔掉了 var_dump（$settings[“categoriesmain2”]）并且它正在回显字符串（1） “1”，而不是类别。第一个是字符串（1）“0”和 第三个字符串（1）“2”，表示正在回显第一个选择， 第二选择，第三选择

因为它是一个数组，所以可以将每个值作为id获取，然后使用该id获取它的名称

更新：示例

// an array contains cats ids
$categories_ids = array(1,5,7,3);

// sql stmnt to get all info about each id
$sql = 'select * from categories where id in("'.implode('",'", array_values($categories_ids) ).'")';

---

这只是一个例子，你也可以这样做。

不要使用query\u posts，这对性能非常有害（）尝试

var\u dump（$settings）

我想你尝试了一个错误的选项。您使用某种设置框架，您应该说哪一种。@janw Yep，我在

query\u posts（'category\u name='。$settings['categoriesmain2].&posts\u per\u page=1'）之后添加了
var\u dump（$settings）

和正在回显中的所有后端设置，但不明白为什么，它应该指向该类别，因为其他选项工作正常。喜欢文本/复选框。仅针对select是一个问题。啊，在我应该使用var_dump的地方得到了它，现在我对

var_dump（$settings[“categoriesmain2”]）

执行了该操作，并且它回显了

string（1）“1”

，而不是类别。第一个是

string（1）“0”

，第三个是

string（1）“2”

，这意味着它在回显第一个select、第二个select、第三个select.hmm。。我刚刚开始。你能帮我写一些示例代码吗。

// an array contains cats ids
$categories_ids = array(1,5,7,3);

// sql stmnt to get all info about each id
$sql = 'select * from categories where id in("'.implode('",'", array_values($categories_ids) ).'")';