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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 |
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104 | } |
105 |
|
106 | /** |
107 | * Fires after the Multisite DB upgrade for each site is complete. |
108 | * |
109 | * @since MU (3.0.0) |
110 | * |
111 | * @param array $response The upgrade response array. |
112 | */ |
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 ); |