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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 |
|---|---|
| 732 | </table> |
| 733 | <?php |
| 734 | endif; |
| 735 | |
| 736 | /** |
| 737 | * Fires just before the submit button in the custom header options form. |
| 738 | * |
| 739 | * @since 3.1.0 |
| 740 | */ |
| 741 | do_action( 'custom_header_options' ); |
| 742 | |
| 743 | wp_nonce_field( 'custom-header-options', '_wpnonce-custom-header-options' ); |
| 744 | ?> |
| 745 | |
| 746 | <?php submit_button( null, 'primary', 'save-header-options' ); ?> |
| 747 | </form> |
| 748 | </div> |
| 749 | |
| 750 | <?php |