get_attached_file( int $attachment_id, bool $unfiltered = false )
基于附件ID检索附加文件路径。
Retrieve attached file path based on attachment ID.
目录锚点:#说明#参数#返回#源码#笔记
默认情况下,路径将通过“get_attached_file”筛选器,但如果向get_attached_file()的$unfiltered参数传递true,则将返回未筛选的文件路径。
该函数通过获取名为“wp_attached_file”的单个post元名称并返回它来工作。这是一个方便的函数,用于防止查找元名称,并提供通过筛选器发送附加文件名的机制。
参数 | 类型 | 必填 | 说明 |
$attachment_id |
(int) |
必需 |
附件ID。 |
$unfiltered |
(bool) |
可选 |
是否应用筛选器。 |
(string|false)附加文件应位于的文件路径,否则为false。
/**
* Retrieve attached file path based on attachment ID.
*
* By default the path will go through the 'get_attached_file' filter, but
* passing a true to the $unfiltered argument of get_attached_file() will
* return the file path unfiltered.
*
* The function works by getting the single post meta name, named
* '_wp_attached_file' and returning it. This is a convenience function to
* prevent looking up the meta name and provide a mechanism for sending the
* attached filename through a filter.
*
* @since 2.0.0
*
* @param int $attachment_id Attachment ID.
* @param bool $unfiltered Optional. Whether to apply filters. Default false.
* @return string|false The file path to where the attached file should be, false otherwise.
*/
function get_attached_file( $attachment_id, $unfiltered = false ) {
$file = get_post_meta( $attachment_id, '_wp_attached_file', true );
// If the file is relative, prepend upload dir.
if ( $file && 0 !== strpos($file, '/') && !preg_match('|^.:\|', $file) && ( ($uploads = wp_upload_dir()) && false === $uploads['error'] ) )
$file = $uploads['basedir'] . "/$file";
if ( $unfiltered )
return $file;
/**
* Filter the attached file based on the given ID.
*
* @since 2.1.0
*
* @param string $file Path to attached file.
* @param int $attachment_id Attachment ID.
*/
return apply_filters( 'get_attached_file', $file, $attachment_id );
}
更新版本 |
源码位置 |
使用 |
被使用 |
2.0.0 |
wp-includes/post.php:498 |
24 |
4 |
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