內容簡介
顯示每個文章關聯的分類的圖像。
注意事項：
此外掛提供了模板標籤，基本上複製和擴展了 WordPress 核心功能the_category ()的功能，以添加顯示分類圖像而不是連結到分類存檔頁面的分類名稱的能力。默認情況下，由於其 $image_extensions 參數設置為 ""，因此此外掛可以取代the_category()的功能。就像在the_category()中所做的一樣，每個分類的圖像或文本也是一個指向該分類存檔頁面的鏈接。
有關此函數的相關信息：
如果定義了 $image_extensions，但該分類沒有找到圖像，則不會為該分類顯示任何內容。
$image_extensions可定義為空格分隔的圖像擴展名列表。會按照提供的擴展名的順序進行檢查，預設為 "png gif jpg"。
通過 $limit 參數可以限制顯示的分類鏈接/圖像的數量
分類圖像標籤是使用 class="catimage" 定義的，以便進行樣式表操作。
結果可以通過名為“c2c_the_category_image”的過濾器進行過濾。
必須在“循環”內運行。
c2c_get_category_image_list()是另一個提供的函數，它與完全相同，只是它不會回显結果。
鏈接：外掛首頁|插件目錄頁面|作者首頁
模板標籤
此外掛提供了一個可用於主題模板的可選模板標籤。
函數
<?php function c2c_the_category_image($separator='', $parents='', $image_extensions='png gif jpg', $image_dir='/wp-content/images/', $use_name_if_no_image=false, $start_from='begin', $limit=999) ?>
這會顯示與文章分類相關聯的圖像。
參數
$separator
可選的參數。出現在文章分類圖像之間的文本和/或HTML。
$parents
可選的參數。允許您指定是否將文章分類的祖先分類也設置為圖像和鏈接。有效的選項是“multiple”，“single”和“”。默認值是“”。
$image_extensions
可選的參數。一個以空格分隔的圖像擴展名列表（不分大小寫）。如果定義為 ""，則不會檢索圖像，而是顯示分類名稱（如the_category()）。預設為“png gif jpg”。
$image_dir
可選的參數。分類圖像所在的目錄。該值應該是相對於您的博客的主URL的位置。默認為“/wp-content/images/”
$use_name_if_no_image
可選的參數。Boolean值（true或false），指示是否應該為每個沒有關聯圖像的分類顯示該分類的名稱。默認值為false。
$start_from
可選的參數。如何遍歷文章的分類列表；“begin”或“end”。
外掛標籤
開發者團隊
原文外掛簡介
Display an image for each category associated with a post.
Notes:
This plugin provides the templates tag c2c_the_category_image() which basically reproduces and extends the functionality of WordPress’s core function the_category() to add the ability to display a category image instead of the category name in the link to the category archive. With its $image_extensions argument defaulted to "", the plugin could be a drop-in replacement for the_category(). As is done in the_category(), the image or text for each category is also a link back to that category’s archive.
Related info about the function:
If $image_extensions is defined, but no image is found for the category, then nothing is displayed for that category.
$image_extensions can be defined as a space separated list of image extensions. Files will be checked with the image extensions in the order those extensions were provided; default is ‘png gif jpg’.
The number of category links/images displayed can be limited via the $limit argument
Category image tags are defined with class=”catimage” for stylesheet manipulation.
The result can be filtered via the filter named “c2c_the_category_image”.
Must be run inside “the loop”.
c2c_get_category_image_list() is another provided function, which is identical to c2c_the_category_image() except that it doesn’t echo the result.
Links: Plugin Homepage | Plugin Directory Page | Author Homepage
Template Tags
The plugin provides one optional template tag for use in your theme templates.
Functions
This displays the image associated with a post’s categories.
Arguments
$separator
Optional argument. The text and/or HTML to appear between each of a post’s category images.
$parents
Optional argument. Allows you to specify if you want ancestor categories of a post’s category to be imaged and linked as well. Valid options are ‘multiple’, ‘single’, and ”. Default is ”.
$image_extensions
Optional argument. A space-separated list of image extensions (case insensitive). If defined as ” then no image is retrieved and the category name is displayed instead (a la the_category()). Default is ‘png gif jpg’.
$image_dir
Optional argument. The directory in which the category image(s) reside. The value should be a location relative to the main URL of your blog. Default is ‘/wp-content/images/’
$use_name_if_no_image
Optional argument. Boolean value (true or false) indicating if the name of the category should be displayed for each category that does not have an associated image. Default is false.
$start_from
Optional argument. How to traverse the list of post’s categories; either ‘begin’ or ‘end’. Default is ‘begin’
$limit
Optional argument. The maximum number of category images to be displayed. Default is 999 (basically, no limit)
$post_id
Optional argument. The Post ID. If false, then use the current post (i.e. while in the loop). Default is false.
Examples
You can opt to treat only certain categories as having a graphical representation by defining an image for them but not creating images for the non-graphically represented categories (as in you can have a subset of categories that dictate what image to be displayed for the post).
You can take advantage of the $image_extension and/or $image_dir arguments to display different category icons under different contexts, i.e. if showing a $single post, choose to use a ‘png’ image, otherwise use ‘gif’; or locate your images in different directories ‘/wp-content/images/cat-images/small/’ and ‘/wp-content/images/cat-images/large/’ and decide based on context where to get the image(s) from:
// In showing the post singularly, then use a larger image, else use a small image
if ( is_single() ) {
c2c_the_category_image(”, ”, ‘gif’, ‘/wp-content/images/cat-images/large/’);
} else {
c2c_the_category_image(”, ”, ‘gif’, ‘/wp-content/images/cat-images/small/’);
}
Show all images in a comma-separated line:
Show all images in an unordered list:
Assuming one category per post, just show the category image without further HTML markup:
< ?php c2c_the_category_image(' '); // note the space in the argument, necessary to turn off default
markups ?>
Filters
The plugin exposes two filters and one action for hooking. Typically, customizations utilizing these hooks would be put into your active theme’s functions.php file, or used by another plugin.
c2c_get_category_image (filter)
The ‘c2c_get_category_image’ hook allows you to use an alternative approach to safely invoke c2c_get_category_image() in such a way that if the plugin were deactivated or deleted, then your calls to the function won’t cause errors in your site.
Arguments:
same as for c2c_get_category_image()
Example:
Instead of:
Do:
c2c_get_the_category_image_list (filter)
The ‘c2c_get_the_category_image_list’ hook allows you to use an alternative approach to safely invoke c2c_get_the_category_image_list() in such a way that if the plugin were deactivated or deleted, then your calls to the function won’t cause errors in your site.
Arguments:
same as for c2c_get_the_category_image_list()
Example:
Instead of:
Do:
c2c_the_category_image (action)
The ‘c2c_the_category_image’ hook allows you to use an alternative approach to safely invoke c2c_the_category_image() in such a way that if the plugin were deactivated or deleted, then your calls to the function won’t cause errors in your site.
Arguments:
same as for c2c_the_category_image()
Example:
Instead of:
Do:
