php柱状图生成类代码_PHP教程

php教程柱状图生成类代码
//这是一段完美的php柱状图生成类代码，可以生成漂亮实用的柱状图

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,235,233,233);
$tcolor = imagecolorallocate($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 < $num){
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 <= (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);
}

//调用方法：

header("content-type:image/png");
$data = array("yahoo" => 120, "google" => 260,"microsoft" => 320,"ibm" => 290,"sun system" => 150,"inter" => 260);
createimage($data,38,25,460);

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