[Solved] Use of global for mysqli_insert_id()

by 


class MySQLiConnection { 
      private static $conn = null;
      private function __construct() { }

      public static function getConnection() {
            if (static::$conn === null) { 
                static::$conn = mysqli_connect(/* your params go here */);
            }
            return static::$conn;
      } 
}

Then you can replace all global $conn with $conn = MySQLiConnection::getConnection()

4

solved Use of global for mysqli_insert_id()