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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 |
---|---|
712 | </tbody> |
713 | </table> |
714 | <?php endif; |
715 |
|
716 | /** |
717 | * Fires just before the submit button in the custom header options form. |
718 | * |
719 | * @since 3.1.0 |
720 | */ |
721 | do_action( 'custom_header_options' ); |
722 |
|
723 | wp_nonce_field( 'custom-header-options', '_wpnonce-custom-header-options' ); ?> |
724 |
|
725 | <?php submit_button( null, 'primary', 'save-header-options' ); ?> |
726 | </form> |
727 | </div> |
728 |
|
729 | <?php } |
730 |
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