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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 3 times in this file.
| Line | Code |
|---|---|
| 2248 | */ |
| 2249 | function get_calendar( $initial = true, $display = true ) { |
| 2250 | global $wpdb, $m, $monthnum, $year, $wp_locale, $posts; |
| 2251 | |
| 2252 | $key = md5( $m . $monthnum . $year ); |
| 2253 | $cache = wp_cache_get( 'get_calendar', 'calendar' ); |
| 2254 | |
| 2255 | if ( $cache && is_array( $cache ) && isset( $cache[ $key ] ) ) { |
| 2256 | /** This filter is documented in wp-includes/general-template.php */ |
| 2257 | $output = apply_filters( 'get_calendar', $cache[ $key ] ); |
| 2258 | |
| 2259 | if ( $display ) { |
| 2260 | echo $output; |
| 2261 | return; |
| 2262 | } |
| 2263 | |
| 2264 | return $output; |
| 2265 | } |
| 2266 | |
| Line | Code |
| 2455 | |
| 2456 | if ( $display ) { |
| 2457 | /** |
| 2458 | * Filters the HTML calendar output. |
| 2459 | * |
| 2460 | * @since 3.0.0 |
| 2461 | * |
| 2462 | * @param string $calendar_output HTML output of the calendar. |
| 2463 | */ |
| 2464 | echo apply_filters( 'get_calendar', $calendar_output ); |
| 2465 | return; |
| 2466 | } |
| 2467 | /** This filter is documented in wp-includes/general-template.php */ |
| 2468 | return apply_filters( 'get_calendar', $calendar_output ); |
| 2469 | } |
| 2470 | |
| 2471 | /** |
| 2472 | * Purges the cached results of get_calendar. |
| 2473 | * |
| 2474 | * @see get_calendar() |
| 2475 | * @since 2.1.0 |
| 2476 | */ |
| 2477 | function delete_get_calendar_cache() { |