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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 |
|---|---|
| 1548 | if ( !$post =& get_post( $mime ) ) |
| 1549 | return false; |
| 1550 | $post_id = (int) $post->ID; |
| 1551 | $mime = $post->post_mime_type; |
| 1552 | } |
| 1553 | |
| 1554 | if ( empty($mime) ) |
| 1555 | return false; |
| 1556 | |
| 1557 | $icon_dir = apply_filters( 'icon_dir', get_template_directory() . '/images' ); |
| 1558 | $icon_dir_uri = apply_filters( 'icon_dir_uri', get_template_directory_uri() . '/images' ); |
| 1559 | |
| 1560 | $types = array( |
| 1561 | substr($mime, 0, strpos($mime, '/')), |
| 1562 | substr($mime, strpos($mime, '/') + 1), |
| 1563 | str_replace('/', '_', $mime) |
| 1564 | ); |
| 1565 | |
| 1566 | $exts = array('jpg', 'gif', 'png'); |