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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 |
|---|---|
| 1301 | |
| 1302 | /** |
| 1303 | * Filters the attachment fields to edit. |
| 1304 | * |
| 1305 | * @since 2.5.0 |
| 1306 | * |
| 1307 | * @param array $form_fields An array of attachment form fields. |
| 1308 | * @param WP_Post $post The WP_Post attachment object. |
| 1309 | */ |
| 1310 | $form_fields = apply_filters( 'attachment_fields_to_edit', $form_fields, $post ); |
| 1311 | |
| 1312 | return $form_fields; |
| 1313 | } |
| 1314 | |
| 1315 | /** |
| 1316 | * Retrieve HTML for media items of post gallery. |
| 1317 | * |
| 1318 | * The HTML markup retrieved will be created for the progress of SWF Upload |
| 1319 | * component. Will also create link for showing and hiding the form to modify |
| Line | Code |
| 1661 | $form_fields[$taxonomy] = $t; |
| 1662 | } |
| 1663 | } |
| 1664 | |
| 1665 | // Merge default fields with their errors, so any key passed with the error (e.g. 'error', 'helps', 'value') will replace the default |
| 1666 | // The recursive merge is easily traversed with array casting: foreach ( (array) $things as $thing ) |
| 1667 | $form_fields = array_merge_recursive($form_fields, (array) $args['errors'] ); |
| 1668 | |
| 1669 | /** This filter is documented in wp-admin/includes/media.php */ |
| 1670 | $form_fields = apply_filters( 'attachment_fields_to_edit', $form_fields, $post ); |
| 1671 | |
| 1672 | unset( $form_fields['image-size'], $form_fields['align'], $form_fields['image_alt'], |
| 1673 | $form_fields['post_title'], $form_fields['post_excerpt'], $form_fields['post_content'], |
| 1674 | $form_fields['url'], $form_fields['menu_order'], $form_fields['image_url'] ); |
| 1675 | |
| 1676 | /** This filter is documented in wp-admin/includes/media.php */ |
| 1677 | $media_meta = apply_filters( 'media_meta', '', $post ); |
| 1678 | |
| 1679 | $defaults = array( |