PHP生成柱状图实例代码

程序员文章站 2024-02-11 09:22:16

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/*PHP生成柱状图*/
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 + 40,$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, 30, 0, 30, $height - 2, $lineColor);
imageline ( $im, 30, $height - 2, $width + 30 -2 , $height - 2,$lineColor);
while($i imagefilledrectangle ( $im, $i * ($tspace+$twidth) + 40, $height - $dataValue[$i], $i * ($tspace+$twidth) + 40 + $twidth, $height - 3, $tColor);
imagestringup ( $im, 4, $i * ($tspace+$twidth) + $twidth/2 + 30, $height - 10, $dataName[$i]."(".$dataValue[$i].")", $lineColor);
$i++;
}
while($j imagestringup ( $im, 4, 2, $height - $j * 10 + 10, $j * 10, $lineColor);
$j = $j + 10;
}
while($k if($k != 0)
imageline ( $im, 28, $height - $k * 10, 32 , $height - $k * 10,$lineColor);
$k = $k + 10;
}
imagepng($im);
}
//柱状图调用方法
header("content-type:image/png");
$data = array("Yahoo" => 140, "Google" => 200,"Microsoft" => 120,"IBM" => 80,"Sun System" => 350,"Inter" => 20);
将这行中数据改成你的即可：$data = array("Yahoo" => 100, "Google" => 260,"Microsoft" => 320,"IBM" => 250,"Sun System" => 150,"Inter" => 220);
createImage($data,50,25,500);
?>