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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 168 | global $wp_rewrite; |
| 169 | if ( !$year ) |
| 170 | $year = gmdate('Y', time()+(get_option('gmt_offset') * 3600)); |
| 171 | if ( !$month ) |
| 172 | $month = gmdate('m', time()+(get_option('gmt_offset') * 3600)); |
| 173 | $monthlink = $wp_rewrite->get_month_permastruct(); |
| 174 | if ( !empty($monthlink) ) { |
| 175 | $monthlink = str_replace('%year%', $year, $monthlink); |
| 176 | $monthlink = str_replace('%monthnum%', zeroise(intval($month), 2), $monthlink); |
| 177 | return apply_filters('month_link', get_option('home') . trailingslashit($monthlink), $year, $month); |
| 178 | } else { |
| 179 | return apply_filters('month_link', get_option('home') . '/?m=' . $year . zeroise($month, 2), $year, $month); |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | function get_day_link($year, $month, $day) { |
| 184 | global $wp_rewrite; |
| 185 | if ( !$year ) |
| 186 | $year = gmdate('Y', time()+(get_option('gmt_offset') * 3600)); |
| 187 | if ( !$month ) |
| 188 | $month = gmdate('m', time()+(get_option('gmt_offset') * 3600)); |