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wp_nonce_tick() WP 2.5.0

Get the time-dependent variable for nonce creation.

A nonce has a lifespan of two ticks. Nonces in their second tick may be updated, e.g. by autosave.

This is a pluggable function, and it can be replaced by a plugin. It means that this function is defined (works) only after all plugins are loaded (included), but before this moment this function has not defined. Therefore, you cannot call this and all functions depended on this function directly from a plugin code. It must be called on plugins_loaded hook or later, for example on init hook.

Function replacement (override) — in a plugin you can create a function with the same name, then it replace this function.

Hooks in function
Return

float. Float value rounded up to the next highest integer.

Usage

wp_nonce_tick();

Code of wp nonce tick: wp-includes/pluggable.php VER 5.1.1

<?php
function wp_nonce_tick() {
	/**
	 * Filters the lifespan of nonces in seconds.
	 *
	 * @since 2.5.0
	 *
	 * @param int $lifespan Lifespan of nonces in seconds. Default 86,400 seconds, or one day.
	 */
	$nonce_life = apply_filters( 'nonce_life', DAY_IN_SECONDS );

	return ceil( time() / ( $nonce_life / 2 ) );
}