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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 |
|---|---|
| 6781 | $icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/media' ); |
| 6782 | |
| 6783 | /** |
| 6784 | * Filters the icon directory URI. |
| 6785 | * |
| 6786 | * @since 2.0.0 |
| 6787 | * |
| 6788 | * @param string $uri Icon directory URI. |
| 6789 | */ |
| 6790 | $icon_dir_uri = apply_filters( 'icon_dir_uri', includes_url( 'images/media' ) ); |
| 6791 | |
| 6792 | /** |
| 6793 | * Filters the array of icon directory URIs. |
| 6794 | * |
| 6795 | * @since 2.5.0 |
| 6796 | * |
| 6797 | * @param string[] $uris Array of icon directory URIs keyed by directory absolute path. |
| 6798 | */ |
| 6799 | $dirs = apply_filters( 'icon_dirs', array( $icon_dir => $icon_dir_uri ) ); |