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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 |
|---|---|
| 67 | require_once( ABSPATH . WPINC . '/http.php' ); |
| 68 | $response = wp_remote_get( admin_url( 'upgrade.php?step=1' ), array( 'timeout' => 120, 'httpversion' => '1.1' ) ); |
| 69 | /** |
| 70 | * Fires after the multisite DB upgrade is complete. |
| 71 | * |
| 72 | * @since 3.0.0 |
| 73 | * |
| 74 | * @param array|WP_Error $response The upgrade response array or WP_Error on failure. |
| 75 | */ |
| 76 | do_action( 'after_mu_upgrade', $response ); |
| 77 | unset($response); |
| 78 | } |
| 79 | unset($c); |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | require_once(ABSPATH . 'wp-admin/includes/admin.php'); |
| 84 | |
| 85 | auth_redirect(); |