PHP generates a histogram instance code

/*php Generate histogram */ function CreateImage ($data, $twidth, $tspace, $height) { $dataName = Array (); $dataValue = Array (); $i = 0; $j = 0; $k = 0; $num = sizeof ($DATA); foreach ($data as $key = = $val) { $dataName [] = $key; $dataValue [] = $val; } $maxnum = max ($data); $width = ($twidth + $tspace) * $num + 4;//image ' s width $im = imagecreate ($width + +, $height +20); $lineColor = Imagecolorallocate ($im, 12,12,12); $bgColor = Imagecolorallocate ($im, 255,233,233); $tColor = Imagecolorallocate ($im, 123,200,56); Imagefill ($im, 0,0, $bgColor); Imageline ($im, 0, $height-2, $lineColor); Imageline ($im, $height-2, $width + 30-2, $height-2, $lineColor); while ($i < $num) { Imagefilledrectangle ($im, $i * ($tspace + $twidth) +, $height-$dataValue [$i], $i * ($tspace + $twidth) + + + $twidth, $height -3, $tColor); Imagestringup ($im, 4, $i * ($tspace + $twidth) + $twidth/2 +, $height -10, $dataName [$i]. " (". $dataValue [$i].") ", $lineColor); $i + +; } while ($j <= (500/10)) { Imagestringup ($im, 4, 2, $height-$j * + ten, $j *, $lineColor); $j = $j + 10; } while ($k <= (500/10)) { if ($k! = 0) Imageline ($im, $height-$k *, $height-$k *, $lineColor); $k = $k + 10; } Imagepng ($im); } Histogram Call method Header ("Content-type:image/png"); $data = Array ("Yahoo" + +), "Google", "Microsoft" + +, "IBM" +, "Sun System", "Inter" =& Gt 20); Change the data in this line to yours: $data = Array ("Yahoo" + +, "Google" = 260, "Microsoft" + +), "IBM" + +, "Sun System" "Inter" (220); CreateImage ($data, 50,25,500); ?> Copy Code Bar chart, as follows:

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