Vẽ Biểu đồ dạng cột php

1275,"B"=>1312,"C"=>17 ,"D"=>200);$max = max( $cells );$total = count ( $cells );$totalwidth = 556;$totalheight = 120;$xgutter = 100; // left/right margin$ygutter = 20; // top/bottom margin$internalgap = 10; // space between cells$bottomspace = 30; // gap at the bottom (in addition to margin)if(!isset($font))$font = "C:\Windows\Fonts\