贴段PHP画图的程序，给希望用PHP作图的朋友一点启发，帮助！

程序

主要包括三个文件：
1、view.php是调用程序。
2、chart.php是用来生成图表的程序。
3、gbtoutf8.php是用来中文解码的（注：已解决中英文混合不能正常显示的问题）

1、view.php

include("gbtoutf8.php");
?>

/*此处数据可从数据库中取得*/
$aStr = "IT,PC,Phone,Sever,Passport,Software";
$aSoft = "Win2000,Win98,Office,Foxmail,Outlook";
$aHard = gb2utf8("地板,窗户,玻璃,桌子,灯管,植被");
$title1 = gb2utf8('2002年IT维护report');
$title2 = gb2utf8('2002年软件维护report');
$title3 = gb2utf8('2002年固定资产report');
?>





2、chart.php
/*
*  功能：生成统计图表
*  程序员：wlxz
*　日期：2002-00-00
*/

Header("Content-type: image/png");
  $im = ImageCreate (350, 280);
  $col_oth = ImageColorAllocate($im, 0,0,0);
  $col_orn = ImageColorAllocate($im, 255,192,0);
  $col_yel = ImageColorAllocate($im, 255,255,0);
  $col_red = ImageColorAllocate($im, 255,0,0);
  $col_grn = ImageColorAllocate($im, 0,255,0);
  $col_blu = ImageColorAllocate($im, 0,0,255);
  $col_wit = ImageColorAllocate($im, 255,255,255);
  $col_array = array($col_oth, $col_orn, $col_yel, $col_red, $col_grn, $col_blu);

$dot1 = 28;
$dot2 = 20;
$font="c:/winnt/fonts/simhei.ttf";
$aStr = explode(",", trim($_GET['aStr']));
$title = trim($_GET['title']);

ImageTTFText($im,18,0,100,50,$col_wit,$font,$title);//写标题

  for($i=1;$i  ImageFilledRectangle($im,50*$i-$dot2,$dot1*$i,50*$i,200,$col_array[$i]);
  ImageRectangle($im,50*$i-$dot2,$dot1*$i,50*$i,200,$col_wit);
  ImageRectangle($im,50*$i-$dot2-1,$dot1*$i-1,50*$i+1,200,$col_wit);
  ImageTTFText($im,14,270,50*$i-15,205,$col_wit,$font,$aStr[$i-1]);
  
// ImageLine($im,50*$i-$dot2,$dot1*$i,50*$i-$dot2,200,$col_wit);
  ImageLine($im,50*$i-$dot2,$dot1*$i,50*$i,$dot1*$i,$col_wit);
  }
  ImageRectangle($im,10,10,300,200,$col_wit);
  ImageRectangle($im,11,11,301,201,$col_wit);

//右边百分比
  for($i=1;$i    ImageLine($im,300,$i*33,306,$i*33,$col_wit);
    $str = (100-$i*5)."%";
    ImageTTFText($im,14,0,315,$i*33+2,$col_wit,$font,$str);
  }

  ImagePNG($im);
  ImageDestroy($im);
?>

3.gbtoutf8.php

/*
*  功能：把GB2312编码转换成UTF-8的编码
*  程序员：wlxz
*　日期：2002-00-00
*/

function gb2utf8($gb){
    if(!trim($gb))
        return $gb;

    $filename="gb2312.txt";
    $tmp=file($filename);
    $codetable=array();
    
    while(list($key,$value)=each($tmp))
        $codetable[hexdec(substr($value,0,6))]=substr($value,7,6);
    
    $ret="";
    $utf8="";
    
    while($gb){
        if (ord(substr($gb,0,1))>127)
            {
            $this=substr($gb,0,2);
            $gb=substr($gb,2,strlen($gb));
            $utf8=u2utf8(hexdec($codetable[hexdec(bin2hex($this))-0x8080]));

            for($i=0;$i                $ret.=chr(substr($utf8,$i,3));
            }
            else{
                $ret.=substr($gb,0,1);
                $gb=substr($gb,1,strlen($gb));
                }
    }
    
    return $ret;
}

function u2utf8($c){
    for($i=0;$i        $str="";

    if ($c         $str.=$c;
    }
    else if ($c         $str.=(0xC0 | $c>>6);
        $str.=(0x80 | $c & 0x3F);
    }
    else if ($c         $str.=(0xE0 | $c>>12);
        $str.=(0x80 | $c>>6 & 0x3F);
        $str.=(0x80 | $c & 0x3F);
    }
    else if ($c         $str.=(0xF0 | $c>>18);
        $str.=(0x80 | $c>>12 & 0x3F);
        $str.=(0x80 | $c>>6 & 0x3F);
        $str.=(0x80 | $c & 0x3F);
    }
    
    return $str;
}


function gb2unicode($gb){
    if(!trim($gb))
        return $gb;
    
    $filename="gb2312.txt";
    $tmp=file($filename);
    $codetable=array();

    while(list($key,$value)=each($tmp))
        $codetable[hexdec(substr($value,0,6))]=substr($value,9,4);
    $utf="";
    while($gb){
        if (ord(substr($gb,0,1))>127){
            $this=substr($gb,0,2);
            $gb=substr($gb,2,strlen($gb));
            $utf.="".$codetable[hexdec(bin2hex($this))-0x8080].";";
            }
            else{
                $gb=substr($gb,1,strlen($gb));
                $utf.=substr($gb,0,1);
                }
    }
    return $utf;
}
?>