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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 |
|---|---|
| 4958 | $icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/media' ); |
| 4959 | |
| 4960 | /** |
| 4961 | * Filter the icon directory URI. |
| 4962 | * |
| 4963 | * @since 2.0.0 |
| 4964 | * |
| 4965 | * @param string $uri Icon directory URI. |
| 4966 | */ |
| 4967 | $icon_dir_uri = apply_filters( 'icon_dir_uri', includes_url( 'images/media' ) ); |
| 4968 | |
| 4969 | /** |
| 4970 | * Filter the list of icon directory URIs. |
| 4971 | * |
| 4972 | * @since 2.5.0 |
| 4973 | * |
| 4974 | * @param array $uris List of icon directory URIs. |
| 4975 | */ |
| 4976 | $dirs = apply_filters( 'icon_dirs', array( $icon_dir => $icon_dir_uri ) ); |