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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 |
|---|---|
| 17 | function user_trailingslashit($string, $type_of_url = '') { |
| 18 | global $wp_rewrite; |
| 19 | if ( $wp_rewrite->use_trailing_slashes ) |
| 20 | $string = trailingslashit($string); |
| 21 | else |
| 22 | $string = untrailingslashit($string); |
| 23 | |
| 24 | // Note that $type_of_url can be one of following: |
| 25 | // single, single_trackback, single_feed, single_paged, feed, category, page, year, month, day, paged |
| 26 | $string = apply_filters('user_trailingslashit', $string, $type_of_url); |
| 27 | return $string; |
| 28 | } |
| 29 | |
| 30 | |
| 31 | function permalink_anchor($mode = 'id') { |
| 32 | global $post; |
| 33 | switch ( strtolower($mode) ) { |
| 34 | case 'title': |
| 35 | $title = sanitize_title($post->post_title) . '-' . $id; |