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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 |
---|---|
852 | function the_weekday_date($before='',$after='') { |
853 | global $wp_locale, $post, $day, $previousweekday; |
854 | $the_weekday_date = ''; |
855 | if ( $day != $previousweekday ) { |
856 | $the_weekday_date .= $before; |
857 | $the_weekday_date .= $wp_locale->get_weekday(mysql2date('w', $post->post_date)); |
858 | $the_weekday_date .= $after; |
859 | $previousweekday = $day; |
860 | } |
861 | $the_weekday_date = apply_filters('the_weekday_date', $the_weekday_date, $before, $after); |
862 | echo $the_weekday_date; |
863 | } |
864 |
|
865 | function wp_head() { |
866 | do_action('wp_head'); |
867 | } |
868 |
|
869 | function wp_footer() { |
870 | do_action('wp_footer'); |