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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 |
|---|---|
| 131 | $id = (int) $id; |
| 132 | if ( !$id ) |
| 133 | $id = (int) $post->ID; |
| 134 | |
| 135 | if ( 'page' == get_option('show_on_front') && $id == get_option('page_on_front') ) |
| 136 | $link = get_option('home'); |
| 137 | else |
| 138 | $link = _get_page_link( $id , $leavename ); |
| 139 | |
| 140 | return apply_filters('page_link', $link, $id); |
| 141 | } |
| 142 | |
| 143 | // Ignores page_on_front. Internal use only. |
| 144 | function _get_page_link( $id = false, $leavename = false ) { |
| 145 | global $post, $wp_rewrite; |
| 146 | |
| 147 | if ( !$id ) |
| 148 | $id = (int) $post->ID; |
| 149 | else |