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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 |
|---|---|
| 217 | if ( '' != $pagestruct && isset($post->post_status) && 'draft' != $post->post_status ) { |
| 218 | $link = get_page_uri($id); |
| 219 | $link = ( $leavename ) ? $pagestruct : str_replace('%pagename%', $link, $pagestruct); |
| 220 | $link = get_option('home') . "/$link"; |
| 221 | $link = user_trailingslashit($link, 'page'); |
| 222 | } else { |
| 223 | $link = get_option('home') . "/?page_id=$id"; |
| 224 | } |
| 225 | |
| 226 | return apply_filters( '_get_page_link', $link, $id ); |
| 227 | } |
| 228 | |
| 229 | /** |
| 230 | * Retrieve permalink for attachment. |
| 231 | * |
| 232 | * This can be used in the WordPress Loop or outside of it. |
| 233 | * |
| 234 | * @since 2.0.0 |
| 235 | * |