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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 |
|---|---|
| 1282 | |
| 1283 | /** |
| 1284 | * Filter the attachment fields to edit. |
| 1285 | * |
| 1286 | * @since 2.5.0 |
| 1287 | * |
| 1288 | * @param array $form_fields An array of attachment form fields. |
| 1289 | * @param WP_Post $post The WP_Post attachment object. |
| 1290 | */ |
| 1291 | $form_fields = apply_filters( 'attachment_fields_to_edit', $form_fields, $post ); |
| 1292 | |
| 1293 | return $form_fields; |
| 1294 | } |
| 1295 | |
| 1296 | /** |
| 1297 | * Retrieve HTML for media items of post gallery. |
| 1298 | * |
| 1299 | * The HTML markup retrieved will be created for the progress of SWF Upload |
| 1300 | * component. Will also create link for showing and hiding the form to modify |
| Line | Code |
| 1640 | $form_fields[$taxonomy] = $t; |
| 1641 | } |
| 1642 | } |
| 1643 | |
| 1644 | // Merge default fields with their errors, so any key passed with the error (e.g. 'error', 'helps', 'value') will replace the default |
| 1645 | // The recursive merge is easily traversed with array casting: foreach ( (array) $things as $thing ) |
| 1646 | $form_fields = array_merge_recursive($form_fields, (array) $args['errors'] ); |
| 1647 | |
| 1648 | /** This filter is documented in wp-admin/includes/media.php */ |
| 1649 | $form_fields = apply_filters( 'attachment_fields_to_edit', $form_fields, $post ); |
| 1650 | |
| 1651 | unset( $form_fields['image-size'], $form_fields['align'], $form_fields['image_alt'], |
| 1652 | $form_fields['post_title'], $form_fields['post_excerpt'], $form_fields['post_content'], |
| 1653 | $form_fields['url'], $form_fields['menu_order'], $form_fields['image_url'] ); |
| 1654 | |
| 1655 | /** This filter is documented in wp-admin/includes/media.php */ |
| 1656 | $media_meta = apply_filters( 'media_meta', '', $post ); |
| 1657 | |
| 1658 | $defaults = array( |