wp_verify_nonce()

wp_verify_nonce() — Verifies that a correct security nonce was used with time limit. A nonce is valid for between 12 and 24 hours (by default).

Inputs: $nonce (string): Nonce value that was used for verification, usually via a form field. $action (string|int): Should give context to what is taking place and be the same when nonce was created.

Returns int|false: 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. False if the nonce is invalid.