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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 |
|---|---|
| 115 | |
| 116 | if ( '' != $pagestruct && 'draft' != $post->post_status ) { |
| 117 | $link = get_page_uri($id); |
| 118 | $link = str_replace('%pagename%', $link, $pagestruct); |
| 119 | $link = get_option('home') . "/$link/"; |
| 120 | } else { |
| 121 | $link = get_option('home') . "/?page_id=$id"; |
| 122 | } |
| 123 | |
| 124 | return apply_filters( '_get_page_link', $link, $id ); |
| 125 | } |
| 126 | |
| 127 | function get_attachment_link($id = false) { |
| 128 | global $post, $wp_rewrite; |
| 129 | |
| 130 | $link = false; |
| 131 | |
| 132 | if (! $id) { |
| 133 | $id = $post->ID; |