Fatal error: Uncaught TypeError: array_push(): Argument #1 ($array) must be of type array, null given in /homepages/12/d660424460/htdocs/beautyofmath/random.php:13 Stack trace: #0 /homepages/12/d660424460/htdocs/beautyofmath/random.php(13): array_push(NULL, Array) #1 {main} thrown in /homepages/12/d660424460/htdocs/beautyofmath/random.php on line 13