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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 |
|---|---|
| 2354 | * |
| 2355 | * @type string $path Base directory and subdirectory or full path to upload directory. |
| 2356 | * @type string $url Base URL and subdirectory or absolute URL to upload directory. |
| 2357 | * @type string $subdir Subdirectory if uploads use year/month folders option is on. |
| 2358 | * @type string $basedir Path without subdir. |
| 2359 | * @type string $baseurl URL path without subdir. |
| 2360 | * @type string|false $error False or error message. |
| 2361 | * } |
| 2362 | */ |
| 2363 | $uploads = apply_filters( 'upload_dir', $cache[ $key ] ); |
| 2364 | |
| 2365 | if ( $create_dir ) { |
| 2366 | $path = $uploads['path']; |
| 2367 | |
| 2368 | if ( array_key_exists( $path, $tested_paths ) ) { |
| 2369 | $uploads['error'] = $tested_paths[ $path ]; |
| 2370 | } else { |
| 2371 | if ( ! wp_mkdir_p( $path ) ) { |
| 2372 | if ( 0 === strpos( $uploads['basedir'], ABSPATH ) ) { |