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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 |
|---|---|
| 50 | * WordPress prints the current version and update information, |
| 51 | * using core_update_footer() at priority 10. |
| 52 | * |
| 53 | * @since 2.3.0 |
| 54 | * |
| 55 | * @see core_update_footer() |
| 56 | * |
| 57 | * @param string $content The content that will be printed. |
| 58 | */ |
| 59 | echo apply_filters( 'update_footer', '' ); |
| 60 | ?> |
| 61 | </p> |
| 62 | <div class="clear"></div> |
| 63 | </div> |
| 64 | <?php |
| 65 | /** |
| 66 | * Prints scripts or data before the default footer scripts. |
| 67 | * |
| 68 | * @since 1.2.0 |