Question

我想检查我选择的帖子是否属于我也在帖子页面上显示的类别之一。如果帖子属于我的类别之一，那么我想为类别的标题添加一种样式（颜色：红色；）。因此，我创建了下一个代码：

 <?php
$arg = array(
    'orderby'       => 'name',
    'order'         => 'ASC',
    'post_type'     => 'product',
    'post_per_page' => 12,
    'taxonomy'      => 'product_cat',
);
$categories = get_categories($arg);
$post_id = get_the_ID();

?>
<?php foreach ($categories as $category) : ?>
    <a href="<?php echo get_category_link($category); ?>" class="test">
        <span class="name"><?php echo $category->name; ?></span>
    </a>
    <?php $x =$category->term_id  ?>
    
}
 ?>
<?php endforeach; // $categories as $category ?>

我得到了职位ID和类别ID，但是我无法获得想要的东西。我认为可能应该使用in_category。谁知道如何解决问题？

Answer 1

您可以尝试这样的事情：

在主CSS文件中创建具有所需样式的CSS类
```
.red {
color: red;
}
```
调整您的for循环，以包含一个变量，该变量包含要检查的类别的ID或ID数组。以及当前的类别ID。另外，添加一个带有空字符串的变量，我们以后可以将其用作类添加到您的跨度中。
```
$current_cat_id = $category->term_id;
$check_cat_id = array(122,178); // Add the ID or IDs of the categories you want to check against
$red_class = ''; // An empty string var we'll use for the span class below
```

然后对照术语ID数组检查当前发布的术语ID。如果它存在于数组中，则将类变量更改为CSS类名。

/* Check to see if the current cat ID matches to the one you want to check for */

  if (in_array($current_cat_id, $check_cat_id)) {

    // Put the class name of the CSS class you create as this string

    $red_class = 'red'; 

  }

最后，在您的跨度上回显class变量。如果IF语句为true，它将回显您的类名，如果不是，则不会将该类添加到范围中。
```
<span class="name <?php echo $red_class; ?>"><?php echo $category->name; ?></span>
```

这是整个事情：

    <?php
    $arg = array(
    'orderby'       => 'name',
    'order'         => 'ASC',
    'post_type'     => 'product',
    'post_per_page' => 12,
    'taxonomy'      => 'product_cat',
    );

    $categories = get_categories($arg);
    $post_id = get_the_ID();

    ?>

    <?php foreach ($categories as $category) : ?>

     $current_cat_id = $category->term_id;
     $check_cat_id = array(122); // Add the ID or IDs of the categories you want to check against
     $red_class = ''; // An empty string var we'll use for the span class below

/* Check to see if the current cat ID matches to the one you want to check for */

     if (in_array($current_cat_id, $check_cat_id)) {

        // Put the class name of the CSS class you create as this string

        $red_class = 'red'; 
     }

    <a href="<?php echo get_category_link($category); ?>" class="test">

    /* Echo the red_class var in the span class so that if it's matched it will have the class you assign */

    <span class="name <?php echo $red_class; ?>"><?php echo $category->name; ?></span>
    </a>


   }
   ?>
   <?php endforeach; // $categories as $category ?>

在Wordpress中检查所选帖子是否属于类别

1 个答案: