Application of session in PHP4 2_PHP tutorial

//Welcome page (welcome_reserve.php3)
//This page first determines whether the user is logged in correctly. If not, it goes to the login page.
session_start();
if((!$user_id)or(!$user_array[ticket_day])or(!$user_array[ticket_num])){
Header("Location: login.php3") ;
}
?>

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include("../footer .php3");
?>

http://www.bkjia.com/PHPjc/532252.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/532252.htmlTechArticle//Welcome page (welcome_reserve.php3) //This page first determines whether the user has logged in correctly. If not, Just go to the login page. session_start(); if((!$user_id)or(!$user_array...