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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 |
|---|---|
| 1495 | if ( !$post =& get_post( $mime ) ) |
| 1496 | return false; |
| 1497 | $post_id = $post->ID; |
| 1498 | $mime = $post->post_mime_type; |
| 1499 | } |
| 1500 | |
| 1501 | if ( empty($mime) ) |
| 1502 | return false; |
| 1503 | |
| 1504 | $icon_dir = apply_filters( 'icon_dir', get_template_directory() . '/images' ); |
| 1505 | $icon_dir_uri = apply_filters( 'icon_dir_uri', get_template_directory_uri() . '/images' ); |
| 1506 | |
| 1507 | $types = array( |
| 1508 | substr($mime, 0, strpos($mime, '/')), |
| 1509 | substr($mime, strpos($mime, '/') + 1), |
| 1510 | str_replace('/', '_', $mime) |
| 1511 | ); |
| 1512 | |
| 1513 | $exts = array('jpg', 'gif', 'png'); |