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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 |
|---|---|
| 421 | } else { |
| 422 | $post->iconsize = array($imagesize[0], $imagesize[1]); |
| 423 | } |
| 424 | } |
| 425 | |
| 426 | $post_title = attribute_escape($post->post_title); |
| 427 | |
| 428 | $icon = "<img src='$src' title='$post_title' alt='$post_title' $constraint/>"; |
| 429 | |
| 430 | return apply_filters( 'attachment_icon', $icon, $post->ID ); |
| 431 | } |
| 432 | |
| 433 | function get_attachment_innerHTML($id = 0, $fullsize = false, $max_dims = false) { |
| 434 | $id = (int) $id; |
| 435 | if ( !$post = & get_post($id) ) |
| 436 | return false; |
| 437 | |
| 438 | if ( $innerHTML = get_attachment_icon($post->ID, $fullsize, $max_dims)) |
| 439 | return $innerHTML; |