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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 |
|---|---|
| 3451 | * The key for each item in the array should correspond to an attachment |
| 3452 | * metadata key, and the value should be the desired label. |
| 3453 | * |
| 3454 | * @since 3.7.0 |
| 3455 | * @since 4.9.0 Added the `$post` parameter. |
| 3456 | * |
| 3457 | * @param array $fields An array of the attachment metadata keys and labels. |
| 3458 | * @param WP_Post $post WP_Post object for the current attachment. |
| 3459 | */ |
| 3460 | $audio_fields = apply_filters( 'audio_submitbox_misc_sections', $fields, $post ); |
| 3461 | |
| 3462 | foreach ( $audio_fields as $key => $label ) { |
| 3463 | if ( empty( $meta['audio'][ $key ] ) ) { |
| 3464 | continue; |
| 3465 | } |
| 3466 | |
| 3467 | ?> |
| 3468 | <div class="misc-pub-section misc-pub-audio misc-pub-<?php echo sanitize_html_class( $key ); ?>"> |
| 3469 | <?php echo $label; ?> <strong><?php echo esc_html( $meta['audio'][ $key ] ); ?></strong> |