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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 |
|---|---|
| 28 | <?php |
| 29 | $text = sprintf( __( 'Thank you for creating with <a href="%s">WordPress</a>.' ), __( 'https://wordpress.org/' ) ); |
| 30 | /** |
| 31 | * Filter the "Thank you" text displayed in the admin footer. |
| 32 | * |
| 33 | * @since 2.8.0 |
| 34 | * |
| 35 | * @param string $text The content that will be printed. |
| 36 | */ |
| 37 | echo apply_filters( 'admin_footer_text', '<span id="footer-thankyou">' . $text . '</span>' ); |
| 38 | ?> |
| 39 | </p> |
| 40 | <p id="footer-upgrade" class="alignright"> |
| 41 | <?php |
| 42 | /** |
| 43 | * Filter the version/update text displayed in the admin footer. |
| 44 | * |
| 45 | * WordPress prints the current version and update information, |
| 46 | * using core_update_footer() at priority 10. |