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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 |
|---|---|
| 2308 | * |
| 2309 | * @type string $path Base directory and subdirectory or full path to upload directory. |
| 2310 | * @type string $url Base URL and subdirectory or absolute URL to upload directory. |
| 2311 | * @type string $subdir Subdirectory if uploads use year/month folders option is on. |
| 2312 | * @type string $basedir Path without subdir. |
| 2313 | * @type string $baseurl URL path without subdir. |
| 2314 | * @type string|false $error False or error message. |
| 2315 | * } |
| 2316 | */ |
| 2317 | $uploads = apply_filters( 'upload_dir', $cache[ $key ] ); |
| 2318 | |
| 2319 | if ( $create_dir ) { |
| 2320 | $path = $uploads['path']; |
| 2321 | |
| 2322 | if ( array_key_exists( $path, $tested_paths ) ) { |
| 2323 | $uploads['error'] = $tested_paths[ $path ]; |
| 2324 | } else { |
| 2325 | if ( ! wp_mkdir_p( $path ) ) { |
| 2326 | if ( 0 === strpos( $uploads['basedir'], ABSPATH ) ) { |