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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 |
|---|---|
| 5199 | $icon_dir_uri = apply_filters( 'icon_dir_uri', includes_url( 'images/media' ) ); |
| 5200 | |
| 5201 | /** |
| 5202 | * Filter the list of icon directory URIs. |
| 5203 | * |
| 5204 | * @since 2.5.0 |
| 5205 | * |
| 5206 | * @param array $uris List of icon directory URIs. |
| 5207 | */ |
| 5208 | $dirs = apply_filters( 'icon_dirs', array( $icon_dir => $icon_dir_uri ) ); |
| 5209 | $icon_files = array(); |
| 5210 | while ( $dirs ) { |
| 5211 | $keys = array_keys( $dirs ); |
| 5212 | $dir = array_shift( $keys ); |
| 5213 | $uri = array_shift($dirs); |
| 5214 | if ( $dh = opendir($dir) ) { |
| 5215 | while ( false !== $file = readdir($dh) ) { |
| 5216 | $file = basename($file); |
| 5217 | if ( substr($file, 0, 1) == '.' ) |