How to modify the SESSION validity time in PHP?

How to modify the SESSION validity time in PHP?

1. Set the valid time of SESSION by using the function "setcookie()";

＜?php session_start(); // 保存一天 $lifeTime = 24 * 3600; setcookie(session_name(), session_id(), time() + $lifeTime, "/"); ?＞

2. Set by using the "session_set_cookie_params" function;

＜?php // 保存一天 $lifeTime = 24 * 3600; session_set_cookie_params($lifeTime); session_start(); $_SESSION["admin"] = true; ?＞

3 , set in "session_start()".

 60 * 60 ]);

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