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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 |
|---|---|
| 1384 | |
| 1385 | /** |
| 1386 | * Filters the attachment fields to edit. |
| 1387 | * |
| 1388 | * @since 2.5.0 |
| 1389 | * |
| 1390 | * @param array $form_fields An array of attachment form fields. |
| 1391 | * @param WP_Post $post The WP_Post attachment object. |
| 1392 | */ |
| 1393 | $form_fields = apply_filters( 'attachment_fields_to_edit', $form_fields, $post ); |
| 1394 | |
| 1395 | return $form_fields; |
| 1396 | } |
| 1397 | |
| 1398 | /** |
| 1399 | * Retrieve HTML for media items of post gallery. |
| 1400 | * |
| 1401 | * The HTML markup retrieved will be created for the progress of SWF Upload |
| 1402 | * component. Will also create link for showing and hiding the form to modify |
| Line | Code |
| 1775 | $form_fields[ $taxonomy ] = $t; |
| 1776 | } |
| 1777 | } |
| 1778 | |
| 1779 | // Merge default fields with their errors, so any key passed with the error (e.g. 'error', 'helps', 'value') will replace the default |
| 1780 | // The recursive merge is easily traversed with array casting: foreach ( (array) $things as $thing ) |
| 1781 | $form_fields = array_merge_recursive( $form_fields, (array) $args['errors'] ); |
| 1782 | |
| 1783 | /** This filter is documented in wp-admin/includes/media.php */ |
| 1784 | $form_fields = apply_filters( 'attachment_fields_to_edit', $form_fields, $post ); |
| 1785 | |
| 1786 | unset( |
| 1787 | $form_fields['image-size'], |
| 1788 | $form_fields['align'], |
| 1789 | $form_fields['image_alt'], |
| 1790 | $form_fields['post_title'], |
| 1791 | $form_fields['post_excerpt'], |
| 1792 | $form_fields['post_content'], |
| 1793 | $form_fields['url'], |