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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 209 | $new_path = $path; |
| 210 | |
| 211 | if ( ($uploads = wp_upload_dir()) && false === $uploads['error'] ) { |
| 212 | if ( 0 === strpos($new_path, $uploads['basedir']) ) { |
| 213 | $new_path = str_replace($uploads['basedir'], '', $new_path); |
| 214 | $new_path = ltrim($new_path, '/'); |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | return apply_filters( '_wp_relative_upload_path', $new_path, $path ); |
| 219 | } |
| 220 | |
| 221 | /** |
| 222 | * Retrieve all children of the post parent ID. |
| 223 | * |
| 224 | * Normally, without any enhancements, the children would apply to pages. In the |
| 225 | * context of the inner workings of WordPress, pages, posts, and attachments |
| 226 | * share the same table, so therefore the functionality could apply to any one |
| 227 | * of them. It is then noted that while this function does not work on posts, it |