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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 |
|---|---|
| 39 | ); |
| 40 | |
| 41 | /** |
| 42 | * Filters the "Thank you" text displayed in the admin footer. |
| 43 | * |
| 44 | * @since 2.8.0 |
| 45 | * |
| 46 | * @param string $text The content that will be printed. |
| 47 | */ |
| 48 | echo apply_filters( 'admin_footer_text', '<span id="footer-thankyou">' . $text . '</span>' ); |
| 49 | ?> |
| 50 | </p> |
| 51 | <p id="footer-upgrade" class="alignright"> |
| 52 | <?php |
| 53 | /** |
| 54 | * Filters the version/update text displayed in the admin footer. |
| 55 | * |
| 56 | * WordPress prints the current version and update information, |
| 57 | * using core_update_footer() at priority 10. |