wp_get_attachment_caption()
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概述
wp_get_attachment_caption() 函数用于获取附件的标题。它接受一个可选的附件 ID 参数,返回标题字符串或失败时返回 false。
关键要点
- 函数参数:$post_id(可选,整数类型,默认为全局 $post 的 ID)
- 返回值:成功时返回附件标题字符串,失败时返回 false
- 函数会检查附件是否存在且 post_type 为 'attachment',否则返回 false
- 通过 apply_filters('wp_get_attachment_caption', $caption, $post->ID) 钩子允许过滤标题
代码示例
function wp_get_attachment_caption( $post_id = 0 ) {
$post_id = (int) $post_id;
$post = get_post( $post_id );
if ( ! $post ) {
return false;
}
if ( 'attachment' !== $post->post_type ) {
return false;
}
$caption = $post->post_excerpt;
/**
* Filters the attachment caption.
*
* @since 4.6.0
*
* @param string $caption Caption for the given attachment.
* @param int $post_id Attachment ID.
*/
return apply_filters( 'wp_get_attachment_caption', $caption, $post->ID );
}注意事项
- 函数在 WordPress 4.6.0 版本中引入
- 相关函数包括 get_post() 和 get_the_post_thumbnail_caption()
- 使用 apply_filters() 钩子可以自定义标题输出
原文内容
Retrieves the caption for an attachment.
Parameters
$post_idintoptional-
Attachment ID. Default is the ID of the global
$post.
Source
function wp_get_attachment_caption( $post_id = 0 ) {
$post_id = (int) $post_id;
$post = get_post( $post_id );
if ( ! $post ) {
return false;
}
if ( 'attachment' !== $post->post_type ) {
return false;
}
$caption = $post->post_excerpt;
/**
* Filters the attachment caption.
*
* @since 4.6.0
*
* @param string $caption Caption for the given attachment.
* @param int $post_id Attachment ID.
*/
return apply_filters( 'wp_get_attachment_caption', $caption, $post->ID );
}
Hooks
- apply_filters( ‘wp_get_attachment_caption’, string $caption, int $post_id )
-
Filters the attachment caption.
Changelog
| Version | Description |
|---|---|
| 4.6.0 | Introduced. |