DOC Added a tip to docs describing how to set a cookie for less than a day (#9552)

DOC Added a tip to docs describing how to set a cookie for less than a day
Co-authored-by: Garion Herman <garion@silverstripe.com>

docs/en/02_Developer_Guides/18_Cookies_And_Sessions/01_Cookies.md

@@ -25,6 +25,10 @@ Cookie::set($name, $value, $expiry = 90, $path = null, $domain = null, $secure =
 // Cookie::set('MyApplicationPreference', 'Yes');
 ```
 
+[info]
+To set a cookie for less than 1 day, you can assign an `$expiry` value that is lower than 1. e.g `Cookie::set('name', 'value', $expiry = 0.5);` will set a cookie for 12 hours.
+[/info]
+
 ### get
 
 Returns the value of cookie.

src/Control/Cookie.php

@@ -36,7 +36,7 @@ class Cookie
      *
      * @param string $name
      * @param mixed $value
-     * @param int $expiry
+     * @param float $expiry
      * @param string $path
      * @param string $domain
      * @param bool $secure

src/Control/CookieJar.php

@@ -63,7 +63,7 @@ class CookieJar implements Cookie_Backend
      *
      * @param string $name The name of the cookie
      * @param string $value The value for the cookie to hold
-     * @param int $expiry The number of days until expiry; 0 indicates a cookie valid for the current session
+     * @param float $expiry The number of days until expiry; 0 indicates a cookie valid for the current session
      * @param string $path The path to save the cookie on (falls back to site base)
      * @param string $domain The domain to make the cookie available on
      * @param boolean $secure Can the cookie only be sent over SSL?
@@ -152,7 +152,7 @@ class CookieJar implements Cookie_Backend
      *
      * @param string $name The name of the cookie
      * @param string|array $value The value for the cookie to hold
-     * @param int $expiry The number of days until expiry
+     * @param int $expiry A Unix timestamp indicating when the cookie expires; 0 means it will expire at the end of the session
      * @param string $path The path to save the cookie on (falls back to site base)
      * @param string $domain The domain to make the cookie available on
      * @param boolean $secure Can the cookie only be sent over SSL?

src/Control/Cookie_Backend.php

@@ -24,7 +24,7 @@ interface Cookie_Backend
      *
      * @param string $name The name of the cookie
      * @param string $value The value for the cookie to hold
-     * @param int $expiry The number of days until expiry
+     * @param float $expiry The number of days until expiry
      * @param string $path The path to save the cookie on (falls back to site base)
      * @param string $domain The domain to make the cookie available on
      * @param boolean $secure Can the cookie only be sent over SSL?