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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 2 times in this file.
| Line | Code |
|---|---|
| 1228 | |
| 1229 | /** |
| 1230 | * Filter the attachment fields to edit. |
| 1231 | * |
| 1232 | * @since 2.5.0 |
| 1233 | * |
| 1234 | * @param array $form_fields An array of attachment form fields. |
| 1235 | * @param WP_Post $post The WP_Post attachment object. |
| 1236 | */ |
| 1237 | $form_fields = apply_filters( 'attachment_fields_to_edit', $form_fields, $post ); |
| 1238 | |
| 1239 | return $form_fields; |
| 1240 | } |
| 1241 | |
| 1242 | /** |
| 1243 | * Retrieve HTML for media items of post gallery. |
| 1244 | * |
| 1245 | * The HTML markup retrieved will be created for the progress of SWF Upload |
| 1246 | * component. Will also create link for showing and hiding the form to modify |
| Line | Code |
| 1568 | $form_fields[$taxonomy] = $t; |
| 1569 | } |
| 1570 | } |
| 1571 | |
| 1572 | // Merge default fields with their errors, so any key passed with the error (e.g. 'error', 'helps', 'value') will replace the default |
| 1573 | // The recursive merge is easily traversed with array casting: foreach( (array) $things as $thing ) |
| 1574 | $form_fields = array_merge_recursive($form_fields, (array) $args['errors'] ); |
| 1575 | |
| 1576 | /** This filter is documented in wp-admin/includes/media.php */ |
| 1577 | $form_fields = apply_filters( 'attachment_fields_to_edit', $form_fields, $post ); |
| 1578 | |
| 1579 | unset( $form_fields['image-size'], $form_fields['align'], $form_fields['image_alt'], |
| 1580 | $form_fields['post_title'], $form_fields['post_excerpt'], $form_fields['post_content'], |
| 1581 | $form_fields['url'], $form_fields['menu_order'], $form_fields['image_url'] ); |
| 1582 | |
| 1583 | /** This filter is documented in wp-admin/includes/media.php */ |
| 1584 | $media_meta = apply_filters( 'media_meta', '', $post ); |
| 1585 | |
| 1586 | $defaults = array( |