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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 |
---|---|
1058 | /** |
1059 | * Fires for each custom update action on the WordPress Updates screen. |
1060 | * |
1061 | * The dynamic portion of the hook name, `$action`, refers to the |
1062 | * passed update action. The hook fires in lieu of all available |
1063 | * default update actions. |
1064 | * |
1065 | * @since 3.2.0 |
1066 | */ |
1067 | do_action( "update-core-custom_{$action}" ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores |
1068 | } |
1069 |
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