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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 |
|---|---|
| 5370 | $icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/media' ); |
| 5371 | |
| 5372 | /** |
| 5373 | * Filters the icon directory URI. |
| 5374 | * |
| 5375 | * @since 2.0.0 |
| 5376 | * |
| 5377 | * @param string $uri Icon directory URI. |
| 5378 | */ |
| 5379 | $icon_dir_uri = apply_filters( 'icon_dir_uri', includes_url( 'images/media' ) ); |
| 5380 | |
| 5381 | /** |
| 5382 | * Filters the list of icon directory URIs. |
| 5383 | * |
| 5384 | * @since 2.5.0 |
| 5385 | * |
| 5386 | * @param array $uris List of icon directory URIs. |
| 5387 | */ |
| 5388 | $dirs = apply_filters( 'icon_dirs', array( $icon_dir => $icon_dir_uri ) ); |