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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 |
|---|---|
| 6137 | $icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/media' ); |
| 6138 | |
| 6139 | /** |
| 6140 | * Filters the icon directory URI. |
| 6141 | * |
| 6142 | * @since 2.0.0 |
| 6143 | * |
| 6144 | * @param string $uri Icon directory URI. |
| 6145 | */ |
| 6146 | $icon_dir_uri = apply_filters( 'icon_dir_uri', includes_url( 'images/media' ) ); |
| 6147 | |
| 6148 | /** |
| 6149 | * Filters the array of icon directory URIs. |
| 6150 | * |
| 6151 | * @since 2.5.0 |
| 6152 | * |
| 6153 | * @param string[] $uris Array of icon directory URIs keyed by directory absolute path. |
| 6154 | */ |
| 6155 | $dirs = apply_filters( 'icon_dirs', array( $icon_dir => $icon_dir_uri ) ); |