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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 |
|---|---|
| 561 | $innerHTML = $post->post_title; |
| 562 | |
| 563 | return apply_filters('attachment_innerHTML', $innerHTML, $post->ID); |
| 564 | } |
| 565 | |
| 566 | function prepend_attachment($content) { |
| 567 | $p = '<p class="attachment">'; |
| 568 | $p .= get_the_attachment_link(false, true, array(400, 300)); |
| 569 | $p .= '</p>'; |
| 570 | $p = apply_filters('prepend_attachment', $p); |
| 571 | |
| 572 | return "$p\n$content"; |
| 573 | } |
| 574 | |
| 575 | ?> |
| 576 | |