Warning: Trying to access array offset on false in D:\wwwroot\firstbook_q2877h\web\html.php on line 41

Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, null given in D:\wwwroot\firstbook_q2877h\web\html.php:41 Stack trace: #0 D:\wwwroot\firstbook_q2877h\web\html.php(41): in_array('185581', NULL) #1 {main} thrown in D:\wwwroot\firstbook_q2877h\web\html.php on line 41