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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 |
|---|---|
| 1531 | $media_states[] = __( 'Header Image' ); |
| 1532 | } |
| 1533 | |
| 1534 | if ( current_theme_supports( 'custom-background') ) { |
| 1535 | $meta_background = get_post_meta($post->ID, '_wp_attachment_is_custom_background', true ); |
| 1536 | if ( ! empty( $meta_background ) && $meta_background == $stylesheet ) |
| 1537 | $media_states[] = __( 'Background Image' ); |
| 1538 | } |
| 1539 | |
| 1540 | $media_states = apply_filters( 'display_media_states', $media_states ); |
| 1541 | |
| 1542 | if ( ! empty( $media_states ) ) { |
| 1543 | $state_count = count( $media_states ); |
| 1544 | $i = 0; |
| 1545 | echo ' - '; |
| 1546 | foreach ( $media_states as $state ) { |
| 1547 | ++$i; |
| 1548 | ( $i == $state_count ) ? $sep = '' : $sep = ', '; |
| 1549 | echo "<span class='post-state'>$state$sep</span>"; |