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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 |
|---|---|
| 932 | if ( !$post = & get_post($id) ) |
| 933 | return false; |
| 934 | |
| 935 | if ( $innerHTML = get_attachment_icon($post->ID, $fullsize, $max_dims)) |
| 936 | return $innerHTML; |
| 937 | |
| 938 | |
| 939 | $innerHTML = attribute_escape($post->post_title); |
| 940 | |
| 941 | return apply_filters('attachment_innerHTML', $innerHTML, $post->ID); |
| 942 | } |
| 943 | |
| 944 | /** |
| 945 | * Wrap attachment in <<p>> element before content. |
| 946 | * |
| 947 | * @since 2.0.0 |
| 948 | * @uses apply_filters() Calls 'prepend_attachment' hook on HTML content. |
| 949 | * |
| 950 | * @param string $content |