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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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651 | /** |
652 | * Fires for each custom update action on the WordPress Updates screen. |
653 | * |
654 | * The dynamic portion of the hook name, `$action`, refers to the |
655 | * passed update action. The hook fires in lieu of all available |
656 | * default update actions. |
657 | * |
658 | * @since 3.2.0 |
659 | */ |
660 | do_action( "update-core-custom_{$action}" ); |
661 | } |
662 |
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