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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 |
|---|---|
| 113 | do_action( 'after_mu_upgrade', $response ); |
| 114 | |
| 115 | /** |
| 116 | * Fires after each site has been upgraded. |
| 117 | * |
| 118 | * @since MU (3.0.0) |
| 119 | * |
| 120 | * @param int $site_id The Site ID. |
| 121 | */ |
| 122 | do_action( 'wpmu_upgrade_site', $site_id ); |
| 123 | } |
| 124 | echo '</ul>'; |
| 125 | ?><p><?php _e( 'If your browser does not start loading the next page automatically, click this link:' ); ?> <a class="button" href="upgrade.php?action=upgrade&n=<?php echo ( $n + 5 ); ?>"><?php _e( 'Next Sites' ); ?></a></p> |
| 126 | <script type="text/javascript"> |
| 127 | <!-- |
| 128 | function nextpage() { |
| 129 | location.href = "upgrade.php?action=upgrade&n=<?php echo ( $n + 5 ); ?>"; |
| 130 | } |
| 131 | setTimeout( "nextpage()", 250 ); |