string $action, false|int $result )
Fires once the admin request has been validated or not.
The nonce action.
False if the nonce is invalid, 1 if the nonce is valid and generated between 0-12 hours ago, 2 if the nonce is valid and generated between 12-24 hours ago.
The filter hook is applied in the default
check_admin_referrer() function after the nonce has been checked for security purposes; this allows a plugin to force WordPress to die for extra security reasons. Note that check_admin_referrer is also a “pluggable” function, meaning that plugins can override it.
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do_action( 'check_admin_referer', $action, $result );