Warning: Undefined array key "hwrf" in /var/www/html/analysis/models/index.html on line 46

Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, null given in /var/www/html/analysis/models/index.html:46 Stack trace: #0 /var/www/html/analysis/models/index.html(46): in_array('ref', NULL) #1 {main} thrown in /var/www/html/analysis/models/index.html on line 46