-
-
/*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);
- ?>
-
柱状图，如下：
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![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
