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do_action( 'auth_cookie_malformed', string $cookie, string $scheme )

Fires if an authentication cookie is malformed.

$cookie: (string) Malformed auth cookie.
$scheme: (string) Authentication scheme. Values include 'auth', 'secure_auth', or 'logged_in'.

Used By	Description
wp-includes/pluggable.php: wp_validate_auth_cookie()	Validates authentication cookie.

Version	Description
2.7.0	Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/hooks/auth_cookie_malformed