说明:
简易PHP柱状图。
效果:
用法:
<?php include('histogram.php'); // 将代码包含进来 header("content-type:image/png"); $data = array( "雅虎" => 120, "谷歌" => 260, "微软" => 320, "IBM" => 290, "Sun System" => 150, "Intel" => 260 ); histogram($data,30,20,360); // 输出柱状图 ?>
下载:
phpHistogram.tar.gz (为什么此附件的地址不能分享给朋友们下载?)
代码:
<?php // 柱状图生成类,支持中文。 // $date Array 数据 // $twidth Int 单个柱的宽度 // $tspace Int 柱间间隔 // $height Int 纵坐标高度 function histogram($data,$twidth,$tspace,$height){ //中文字体文件 $fontFile = 'msyh.ttf'; $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,235,233,233); $tColor = imagecolorallocate($im,123,200,56); imagefill($im,0,0,$bgColor); //垂直坐标线 imageline ( $im, 30, 0, 30, $height - 2, $lineColor); //水平坐标线 imageline ( $im, 30, $height - 2, $width + 30 + 2 , $height - 2,$lineColor); while($i < $num){ //填充矩形,坐标从左上到右下 imagefilledrectangle ( $im, $i * ($tspace+$twidth) + 40, $height - $dataValue[$i], $i * ($tspace+$twidth) + 40 + $twidth, $height - 3, $tColor); //垂直写一行文字(背景,字体大小,倾斜角度,坐标X,坐标Y,字体文件,写入的文字内容)(imagestringup函数不支持中文) imagettftext($im,11,90,$i * ($tspace+$twidth) + $twidth/2 + 30 + (15), $height - 10,$lineColor,$fontFile,$dataName[$i]."(".$dataValue[$i].")"); $i++; } while($j <= (500/10)){ imagestringup ( $im, 4, 2, $height - $j * 10 + 10, $j * 10, $lineColor); $j = $j + 10; } while($k <= (500/10)){ if($k != 0) imageline ( $im, 28, $height - $k * 10, 32 , $height - $k * 10,$lineColor); $k = $k + 10; } imagepng($im); } ?>