php做柱型图的函数

#为了方便起见，我又做了一个函数来制作柱型图
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/*参数说明：
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$graphdata:百分比数据(y轴)
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$label:x轴标题
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$data:实际数据(y轴)
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$graphwidth:图像宽度
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$graph背景颜色值
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$text:文本颜色值
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$grid:边线颜色值
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$bar:柱的颜色值
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$bz:备注(不支持中文呀)
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*/
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<?
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function timage(
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$graphdata,$label,$data,
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$graphwidth,$graphheight,$graphscale,$graphfont,
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$bg,$text,$grid,$bar,$bz)
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{
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header("Content-type:image/gif");
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$image=imagecreate($graphwidth+50,$graphheight+50);
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$bgcolor= imagecolorallocate ($image ,$bg[0],$bg[1],$bg[2]);
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$textcolor= imagecolorallocate ($image ,$text[0],$text[1],$text[2]);
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$gridcolor=imagecolorallocate ($image ,$grid[0],$grid[1],$grid[2]);
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$barcolor=imagecolorallocate ($image ,$bar[0],$bar[1],$bar[2]);
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$gridabelwidth=imagefontwidth($graphfont)*3+1;
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$gridableheight= imagefontheight ($graphfont);
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imageline($image,$gridlabelwidth,0,$gridlabelwidth,$graphheight-1,$gridcolor);
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imageline($image,0,$graphheight-1,$graphwidth-1,$graphheight-1,$gridcolor);
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for($i=0;$i<$graphheight;$i+=$graphheight/10)
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{
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imagedashedline ($image,0,$i,$graphwidth-1,$i,$gridcolor);
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imagestring($image,$graphfont,0,$i,round(($graphheight-$i)/$graphscale),$textcolor);
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}
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$barwidth=(($graphwidth-$gridlabelwidth)/count($graphdata))-30;#&iquest;&Oslash;&Ouml;&AElig;&Ouml;ù&micro;&Auml;×&Uuml;&iquest;í&para;&Egrave;
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for($i=0;$i<count($graphdata);$i++)
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{
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$bartopx=$gridlabelwidth+(($i+1)*20)+($i*$barwidth);#&iquest;&Oslash;&Ouml;&AElig;&Ouml;ù&iquest;&iquest;×ó&micro;&Auml;&frac34;à&Agrave;&euml;
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$barbottomx=$bartopx+$barwidth;
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$barbottomy=$graphheight-1;#&iquest;&Oslash;&Ouml;&AElig;&Ouml;ù&micro;&Auml;&Iuml;&Acirc;±&szlig;&frac12;&ccedil;
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$bartopy=$barbottomy-($graphdata[$i]*$graphscale);
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imagefilledrectangle($image,$bartopx,$bartopy,$barbottomx,$barbottomy,$barcolor);
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$labelx1=$bartopx;
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$labely1=$bartopy-15;
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$labelx2=$bartopx;
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$labely2=$graphheight;
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imagestring($image,$graphfont,$labelx1,$labely1,"$graphdata[$i]"."%",$textcolor);
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imagestring($image,$graphfont,$labelx2,$labely2,"$label[$i]",$textcolor);
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imagestringup ($image,$graphfont,$labelx1+10,$labely1-$gridableheight,"$data[$i]",$textcolor);
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}
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imagestring($image,$graphfont,1,$graphheight+30,$bz,$textcolor);
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imagegif ($image);
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}
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?>
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