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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 |
|---|---|
| 6926 | $icon_dir_uri = apply_filters( 'icon_dir_uri', includes_url( 'images/media' ) ); |
| 6927 | |
| 6928 | /** |
| 6929 | * Filters the array of icon directory URIs. |
| 6930 | * |
| 6931 | * @since 2.5.0 |
| 6932 | * |
| 6933 | * @param string[] $uris Array of icon directory URIs keyed by directory absolute path. |
| 6934 | */ |
| 6935 | $dirs = apply_filters( 'icon_dirs', array( $icon_dir => $icon_dir_uri ) ); |
| 6936 | $icon_files = array(); |
| 6937 | while ( $dirs ) { |
| 6938 | $keys = array_keys( $dirs ); |
| 6939 | $dir = array_shift( $keys ); |
| 6940 | $uri = array_shift( $dirs ); |
| 6941 | $dh = opendir( $dir ); |
| 6942 | if ( $dh ) { |
| 6943 | while ( false !== $file = readdir( $dh ) ) { |
| 6944 | $file = wp_basename( $file ); |