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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.
| Line | Code |
|---|---|
| 3405 | * The key for each item in the array should correspond to an attachment |
| 3406 | * metadata key, and the value should be the desired label. |
| 3407 | * |
| 3408 | * @since 3.7.0 |
| 3409 | * @since 4.9.0 Added the `$post` parameter. |
| 3410 | * |
| 3411 | * @param array $fields An array of the attachment metadata keys and labels. |
| 3412 | * @param WP_Post $post WP_Post object for the current attachment. |
| 3413 | */ |
| 3414 | $fields = apply_filters( 'media_submitbox_misc_sections', $fields, $post ); |
| 3415 | |
| 3416 | foreach ( $fields as $key => $label ) { |
| 3417 | if ( empty( $meta[ $key ] ) ) { |
| 3418 | continue; |
| 3419 | } |
| 3420 | |
| 3421 | ?> |
| 3422 | <div class="misc-pub-section misc-pub-mime-meta misc-pub-<?php echo sanitize_html_class( $key ); ?>"> |
| 3423 | <?php echo $label; ?> |