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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 |
|---|---|
| 5882 | $icon_dir_uri = apply_filters( 'icon_dir_uri', includes_url( 'images/media' ) ); |
| 5883 | |
| 5884 | /** |
| 5885 | * Filters the list of icon directory URIs. |
| 5886 | * |
| 5887 | * @since 2.5.0 |
| 5888 | * |
| 5889 | * @param array $uris List of icon directory URIs. |
| 5890 | */ |
| 5891 | $dirs = apply_filters( 'icon_dirs', array( $icon_dir => $icon_dir_uri ) ); |
| 5892 | $icon_files = array(); |
| 5893 | while ( $dirs ) { |
| 5894 | $keys = array_keys( $dirs ); |
| 5895 | $dir = array_shift( $keys ); |
| 5896 | $uri = array_shift( $dirs ); |
| 5897 | if ( $dh = opendir( $dir ) ) { |
| 5898 | while ( false !== $file = readdir( $dh ) ) { |
| 5899 | $file = basename( $file ); |
| 5900 | if ( substr( $file, 0, 1 ) == '.' ) { |