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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 |
---|---|
1751 |
|
1752 | /** |
1753 | * Filter the default media display states for items in the Media list table. |
1754 | * |
1755 | * @since 3.2.0 |
1756 | * |
1757 | * @param array $media_states An array of media states. Default 'Header Image', |
1758 | * 'Background Image', 'Site Icon'. |
1759 | */ |
1760 | $media_states = apply_filters( 'display_media_states', $media_states ); |
1761 |
|
1762 | if ( ! empty( $media_states ) ) { |
1763 | $state_count = count( $media_states ); |
1764 | $i = 0; |
1765 | echo ' — '; |
1766 | foreach ( $media_states as $state ) { |
1767 | ++$i; |
1768 | ( $i == $state_count ) ? $sep = '' : $sep = ', '; |
1769 | echo "<span class='post-state'>$state$sep</span>"; |