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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 |
|---|---|
| 788 | </table> |
| 789 | <?php |
| 790 | endif; |
| 791 | |
| 792 | /** |
| 793 | * Fires just before the submit button in the custom header options form. |
| 794 | * |
| 795 | * @since 3.1.0 |
| 796 | */ |
| 797 | do_action( 'custom_header_options' ); |
| 798 | |
| 799 | wp_nonce_field( 'custom-header-options', '_wpnonce-custom-header-options' ); |
| 800 | ?> |
| 801 | |
| 802 | <?php submit_button( null, 'primary', 'save-header-options' ); ?> |
| 803 | </form> |
| 804 | </div> |
| 805 | |
| 806 | <?php |