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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 |
|---|---|
| 549 | </div> |
| 550 | <?php |
| 551 | /** |
| 552 | * Fires before the permalink field in the edit form. |
| 553 | * |
| 554 | * @since 4.1.0 |
| 555 | * |
| 556 | * @param WP_Post $post Post object. |
| 557 | */ |
| 558 | do_action( 'edit_form_before_permalink', $post ); |
| 559 | ?> |
| 560 | <div class="inside"> |
| 561 | <?php |
| 562 | if ( $viewable ) : |
| 563 | $sample_permalink_html = $post_type_object->public ? get_sample_permalink_html( $post->ID ) : ''; |
| 564 | |
| 565 | // As of 4.4, the Get Shortlink button is hidden by default. |
| 566 | if ( has_filter( 'pre_get_shortlink' ) || has_filter( 'get_shortlink' ) ) { |
| 567 | $shortlink = wp_get_shortlink( $post->ID, 'post' ); |