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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 |
|---|---|
| 230 | function _wp_relative_upload_path( $path ) { |
| 231 | $new_path = $path; |
| 232 | |
| 233 | $uploads = wp_upload_dir(); |
| 234 | if ( 0 === strpos( $new_path, $uploads['basedir'] ) ) { |
| 235 | $new_path = str_replace( $uploads['basedir'], '', $new_path ); |
| 236 | $new_path = ltrim( $new_path, '/' ); |
| 237 | } |
| 238 | |
| 239 | return apply_filters( '_wp_relative_upload_path', $new_path, $path ); |
| 240 | } |
| 241 | |
| 242 | /** |
| 243 | * Retrieve all children of the post parent ID. |
| 244 | * |
| 245 | * Normally, without any enhancements, the children would apply to pages. In the |
| 246 | * context of the inner workings of WordPress, pages, posts, and attachments |
| 247 | * share the same table, so therefore the functionality could apply to any one |
| 248 | * of them. It is then noted that while this function does not work on posts, it |