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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 |
|---|---|
| 476 | } |
| 477 | } else { |
| 478 | $constraint = ''; |
| 479 | } |
| 480 | |
| 481 | $post_title = attribute_escape($post->post_title); |
| 482 | |
| 483 | $icon = "<img src='$src' title='$post_title' alt='$post_title' $constraint/>"; |
| 484 | |
| 485 | return apply_filters( 'attachment_icon', $icon, $post->ID ); |
| 486 | } |
| 487 | |
| 488 | // deprecated: use wp_get_attachment_image() |
| 489 | function get_attachment_innerHTML($id = 0, $fullsize = false, $max_dims = false) { |
| 490 | $id = (int) $id; |
| 491 | if ( !$post = & get_post($id) ) |
| 492 | return false; |
| 493 | |
| 494 | if ( $innerHTML = get_attachment_icon($post->ID, $fullsize, $max_dims)) |