php做柱型图的函数

关键词：PHP

#为了方便起见，我又做了一个函数来制作柱型图
/*参数说明：
$graphdata:百分比数据(y轴)
$label:x轴标题
$data:实际数据(y轴)
$graphwidth:图像宽度
$graphheight:图像高度
$graphscale:高度因子(为$graphheight/100)
$graphfont:字体号
$bg;背景颜色值
$text:文本颜色值
$grid:边线颜色值
$bar:柱的颜色值
$bz:备注(不支持中文呀)
*/
function timage(
$graphdata,$label,$data,
$graphwidth,$graphheight,$graphscale,$graphfont,
$bg,$text,$grid,$bar,$bz)
{

header("Content-type:image/gif");
$image=imagecreate($graphwidth+50,$graphheight+50);
$bgcolor= imagecolorallocate ($image ,$bg[0],$bg,$bg);
$textcolor= imagecolorallocate ($image ,$text[0],$text,$text);
$gridcolor=imagecolorallocate ($image ,$grid[0],$grid,$grid);
$barcolor=imagecolorallocate ($image ,$bar[0],$bar,$bar);
$gridabelwidth=imagefontwidth($graphfont)*3+1;
$gridableheight= imagefontheight ($graphfont);
imageline($image,$gridlabelwidth,0,$gridlabelwidth,$graphheight-1,$gridcolor);
imageline($image,0,$graphheight-1,$graphwidth-1,$graphheight-1,$gridcolor);
for($i=0;$i<$graphheight;$i+=$graphheight/10)
{
imagedashedline ($image,0,$i,$graphwidth-1,$i,$gridcolor);
imagestring($image,$graphfont,0,$i,round(($graphheight-$i)/$graphscale),$textcolor);
}

$barwidth=(($graphwidth-$gridlabelwidth)/count($graphdata))-30;#&iquest;&Oslash;&Ouml;&AElig;&Ouml;ù&micro;&Auml;×&Uuml;&iquest;í&para;&Egrave;
for($i=0;$i {
$bartopx=$gridlabelwidth+(($i+1)*20)+($i*$barwidth);#&iquest;&Oslash;&Ouml;&AElig;&Ouml;ù&iquest;&iquest;×ó&micro;&Auml;&frac34;à&Agrave;&euml;
$barbottomx=$bartopx+$barwidth;
$barbottomy=$graphheight-1;#&iquest;&Oslash;&Ouml;&AElig;&Ouml;ù&micro;&Auml;&Iuml;&Acirc;±&szlig;&frac12;&ccedil;
$bartopy=$barbottomy-($graphdata[$i]*$graphscale);
imagefilledrectangle($image,$bartopx,$bartopy,$barbottomx,$barbottomy,$barcolor);
$labelx1=$bartopx;
$labely1=$bartopy-15;
$labelx2=$bartopx;
$labely2=$graphheight;
imagestring($image,$graphfont,$labelx1,$labely1,"$graphdata[$i]"."%",$textcolor);
imagestring($image,$graphfont,$labelx2,$labely2,"$label[$i]",$textcolor);
imagestringup ($image,$graphfont,$labelx1+10,$labely1-$gridableheight,"$data[$i]",$textcolor);
}
imagestring($image,$graphfont,1,$graphheight+30,$bz,$textcolor);
imagegif ($image);

}
?>