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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 |
---|---|
543 | $id = (int) $id; |
544 |
|
545 | if ( $innerHTML = get_attachment_icon($id, $fullsize, $max_dims)) |
546 | return $innerHTML; |
547 |
|
548 | $post = & get_post($id); |
549 |
|
550 | $innerHTML = $post->post_title; |
551 |
|
552 | return apply_filters('attachment_innerHTML', $innerHTML, $post->ID); |
553 | } |
554 |
|
555 | function prepend_attachment($content) { |
556 | $p = '<p class="attachment">'; |
557 | $p .= get_the_attachment_link(false, true, array(400, 300)); |
558 | $p .= '</p>'; |
559 | $p = apply_filters('prepend_attachment', $p); |
560 |
|
561 | return "$p\n$content"; |