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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 |
|---|---|
| 1874 | |
| 1875 | /** |
| 1876 | * Filters the uploads directory data. |
| 1877 | * |
| 1878 | * @since 2.0.0 |
| 1879 | * |
| 1880 | * @param array $uploads Array of upload directory data with keys of 'path', |
| 1881 | * 'url', 'subdir, 'basedir', and 'error'. |
| 1882 | */ |
| 1883 | $uploads = apply_filters( 'upload_dir', $cache[ $key ] ); |
| 1884 | |
| 1885 | if ( $create_dir ) { |
| 1886 | $path = $uploads['path']; |
| 1887 | |
| 1888 | if ( array_key_exists( $path, $tested_paths ) ) { |
| 1889 | $uploads['error'] = $tested_paths[ $path ]; |
| 1890 | } else { |
| 1891 | if ( ! wp_mkdir_p( $path ) ) { |
| 1892 | if ( 0 === strpos( $uploads['basedir'], ABSPATH ) ) { |