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
  /*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[1],$bg[2]);
  $textcolor=imagecolorallocate($image,$text[0],$text[1],$text[2]);
  $gridcolor=imagecolorallocate($image,$grid[0],$grid[1],$grid[2]);
  $barcolor=imagecolorallocate($image,$bar[0],$bar[1],$bar[2]);
  $gridabelwidth=imagefontwidth($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;#¿ØÖÆÖùµÄ×Ü¿í¶È
  for($i=0;$i{
  $bartopx=$gridlabelwidth+(($i+1)*20)+($i*$barwidth);#¿ØÖÆÖù¿¿×óµÄ¾àÀë
  $barbottomx=$bartopx+$barwidth;
  $barbottomy=$graphheight-1;#¿ØÖÆÖùµÄϱ߽ç
  $bartopy=$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);
  }
  ?>