Fatal error:  Uncaught TypeError: array_keys(): Argument #1 ($array) must be of type array, string given in /home1/wxnorthw/public_html/weather/tools/deq/build_neph_graphs.php:23
Stack trace:
#0 /home1/wxnorthw/public_html/weather/tools/deq/build_neph_graphs.php(23): array_keys('Springfield_Cit...')
#1 /home1/wxnorthw/public_html/weather/tools/deq/build_neph_graphs.php(4): build_neph_graphs('Springfield_Cit...')
#2 {main}
  thrown in /home1/wxnorthw/public_html/weather/tools/deq/build_neph_graphs.php on line 23