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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 |
|---|---|
| 301 | global $wp_rewrite; |
| 302 | if ( !$year ) |
| 303 | $year = gmdate('Y', time()+(get_option('gmt_offset') * 3600)); |
| 304 | if ( !$month ) |
| 305 | $month = gmdate('m', time()+(get_option('gmt_offset') * 3600)); |
| 306 | $monthlink = $wp_rewrite->get_month_permastruct(); |
| 307 | if ( !empty($monthlink) ) { |
| 308 | $monthlink = str_replace('%year%', $year, $monthlink); |
| 309 | $monthlink = str_replace('%monthnum%', zeroise(intval($month), 2), $monthlink); |
| 310 | return apply_filters('month_link', get_option('home') . user_trailingslashit($monthlink, 'month'), $year, $month); |
| 311 | } else { |
| 312 | return apply_filters('month_link', get_option('home') . '/?m=' . $year . zeroise($month, 2), $year, $month); |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | /** |
| 317 | * Retrieve the permalink for the day archives with year and month. |
| 318 | * |
| 319 | * @since 1.0.0 |
| 320 | * |
| 321 | * @param bool|int $year False for current year. Integer of year. |