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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 |
|---|---|
| 541 | $post->iconsize = array($width, $max_dims[1]); |
| 542 | } |
| 543 | } else { |
| 544 | $post->iconsize = array($imagesize[0], $imagesize[1]); |
| 545 | } |
| 546 | } |
| 547 | |
| 548 | $icon = "<img src=\"{$src}\" title=\"{$post->post_title}\" alt=\"{$post->post_title}\" {$constraint}/>"; |
| 549 | |
| 550 | return apply_filters('attachment_icon', $icon, $post->ID); |
| 551 | } |
| 552 | |
| 553 | function get_attachment_innerHTML($id = 0, $fullsize = false, $max_dims = false) { |
| 554 | $id = (int) $id; |
| 555 | |
| 556 | if ( $innerHTML = get_attachment_icon($id, $fullsize, $max_dims)) |
| 557 | return $innerHTML; |
| 558 | |
| 559 | $post = & get_post($id); |