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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 |
|---|---|
| 1864 | |
| 1865 | /** |
| 1866 | * Filter the uploads directory data. |
| 1867 | * |
| 1868 | * @since 2.0.0 |
| 1869 | * |
| 1870 | * @param array $uploads Array of upload directory data with keys of 'path', |
| 1871 | * 'url', 'subdir, 'basedir', and 'error'. |
| 1872 | */ |
| 1873 | $uploads = apply_filters( 'upload_dir', $cache[ $key ] ); |
| 1874 | |
| 1875 | if ( $create_dir ) { |
| 1876 | $path = $uploads['path']; |
| 1877 | $tested_paths = wp_cache_get( 'upload_dir_tested_paths' ); |
| 1878 | |
| 1879 | if ( ! is_array( $tested_paths ) ) { |
| 1880 | $tested_paths = array(); |
| 1881 | } |
| 1882 | |