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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 |
|---|---|
| 578 | $t['value'] = join(', ', $values); |
| 579 | |
| 580 | $form_fields[$taxonomy] = $t; |
| 581 | } |
| 582 | |
| 583 | // Merge default fields with their errors, so any key passed with the error (e.g. 'error', 'helps', 'value') will replace the default |
| 584 | // The recursive merge is easily traversed with array casting: foreach( (array) $things as $thing ) |
| 585 | $form_fields = array_merge_recursive($form_fields, (array) $errors); |
| 586 | |
| 587 | $form_fields = apply_filters('attachment_fields_to_edit', $form_fields, $post); |
| 588 | |
| 589 | return $form_fields; |
| 590 | } |
| 591 | |
| 592 | function get_media_items( $post_id, $errors ) { |
| 593 | if ( $post_id && $post = get_post($post_id) ) { |
| 594 | if ( $post->post_type == 'attachment' ) |
| 595 | $attachments = array($post->ID => $post); |
| 596 | else |