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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 |
|---|---|
| 2011 | $id = (int) $id; |
| 2012 | if ( !$post = get_post($id) ) |
| 2013 | return false; |
| 2014 | |
| 2015 | if ( $innerHTML = get_attachment_icon($post->ID, $fullsize, $max_dims)) |
| 2016 | return $innerHTML; |
| 2017 | |
| 2018 | $innerHTML = esc_attr($post->post_title); |
| 2019 | |
| 2020 | return apply_filters('attachment_innerHTML', $innerHTML, $post->ID); |
| 2021 | } |
| 2022 | |
| 2023 | /** |
| 2024 | * Retrieve bookmark data based on ID. |
| 2025 | * |
| 2026 | * @since 2.0.0 |
| 2027 | * @deprecated 2.1.0 |
| 2028 | * @deprecated Use get_bookmark() |
| 2029 | * @see get_bookmark() |