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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 |
|---|---|
| 1499 | |
| 1500 | /** |
| 1501 | * Filters the attachment fields to edit. |
| 1502 | * |
| 1503 | * @since 2.5.0 |
| 1504 | * |
| 1505 | * @param array $form_fields An array of attachment form fields. |
| 1506 | * @param WP_Post $post The WP_Post attachment object. |
| 1507 | */ |
| 1508 | $form_fields = apply_filters( 'attachment_fields_to_edit', $form_fields, $post ); |
| 1509 | |
| 1510 | return $form_fields; |
| 1511 | } |
| 1512 | |
| 1513 | /** |
| 1514 | * Retrieve HTML for media items of post gallery. |
| 1515 | * |
| 1516 | * The HTML markup retrieved will be created for the progress of SWF Upload |
| 1517 | * component. Will also create link for showing and hiding the form to modify |
| Line | Code |
| 1925 | /* |
| 1926 | * Merge default fields with their errors, so any key passed with the error |
| 1927 | * (e.g. 'error', 'helps', 'value') will replace the default. |
| 1928 | * The recursive merge is easily traversed with array casting: |
| 1929 | * foreach ( (array) $things as $thing ) |
| 1930 | */ |
| 1931 | $form_fields = array_merge_recursive( $form_fields, (array) $args['errors'] ); |
| 1932 | |
| 1933 | /** This filter is documented in wp-admin/includes/media.php */ |
| 1934 | $form_fields = apply_filters( 'attachment_fields_to_edit', $form_fields, $post ); |
| 1935 | |
| 1936 | unset( |
| 1937 | $form_fields['image-size'], |
| 1938 | $form_fields['align'], |
| 1939 | $form_fields['image_alt'], |
| 1940 | $form_fields['post_title'], |
| 1941 | $form_fields['post_excerpt'], |
| 1942 | $form_fields['post_content'], |
| 1943 | $form_fields['url'], |