PHP折线图的示例代码 可以输出汉字的php折线统计图

<?php
/**
*  php折线图示例代码
*  by www.jb200.com
*/
  $data = array(1,2,33,4,5,16,7,8,9,10,11,12);
  $month= array("Jan","Feb","March","April","May","June","July","Aug","Sep","Oct","Nov","Dec");
  $rdata = array(0.1,0.2,6,0.4,0.5,0.6,0.7,2,0.9,1,1.1,1.2);

  $max=max($data);   //获取销售额的最大值
  $rmax=max($rdata);  //获取利润的最大值
 
  $im = imagecreate(600,300); //创建画布
  $green = imagecolorallocate($im,214,235,214);//设置颜色值
  $black = imagecolorallocate($im,0,0,0);  
  $red = imagecolorallocate($im,255,0,0);
  $blue = imagecolorallocate($im,0,0,255);

  imageline($im,20,230,530,230, $blue ); //设置X轴横坐标
  imageline($im,20,20,20,230, $blue );  //设置Y轴纵坐标
  imagestring($im,3,555,222,"X",$black); //输出字符X
  imagestring($im,3,16,1,"Y",$black); //输出字符Y
  
  $l=190;
  $k1=20;
  $k2=500;
     for($j=0;$j<12;$j++){
     imageline($im,$k1,$l,$k2,$l,$black); //设置X轴网格线横坐标
     $l=$l-40; 
  }

  $f=60;
  $z1=30;
  $z2=230;
     for($j=0;$j<12;$j++){
     imageline($im,$f,$z1,$f,$z2,$black);  //设置Y轴网格线纵坐标
     $f=$f+40;
   }
 
  //输出Y轴坐标值
  $a=max($data);
  $b=max($rdata);
  $c=$a>$b?$a:$b;
  $l=185;
     for($j=0;$j<5;$j++){
      imagestring($im,2,2,$l,floor($c/5*($j+1)),$red);
      $l=$l-40; 
   }
  
     $x = 20;
     $y = 230;
     for ($i=1;$i<12;$i++){
  $y_lt = 230-(($data[$i-1]/$max)*200); //设置商品销售额所在的纵坐标值
  $y_ht = 230-(($data[$i]/$max)* 200); //设置商品销售额所在的纵坐标值
  imageline($im,$x*($i*2-1)+20,$y_lt,$x*(($i+1)*2-1)+20,$y_ht,$red); //绘制销售额折线图
  } 
  
  for ($i=1;$i<13;$i++){
      imagestring( $im,2,$x*($i-1)*2+30,$y+11,$month[$i-1],$black);   //输出月份的值
      imagestring( $im,2,$x*($i-1)*2+30,$y+25,$data[$i-1],$red); //输出商品销售额的值
      imagestring( $im,2,$x*($i-1)*2+30,$y+40,$rdata[$i-1],$blue);    //输出销售利润的值
}   
  $fontpath=$_SERVER["SystemRoot"]."fontssimhei.ttf"; //设置字库路径 
  $str=iconv("gb2312","UTF-8","中国人民123");
  $str=str_repeat($str,2);
  imagettftext($im,25,-45,80,20,$blue,$fontpath,$str);
  imagettftext($im,15,30,180,190,$red,$fontpath,$str);

   $x1 = 20;
   $y1 = 230;
   for ($r=1;$r<12;$r++){
   $y_lt1 = 230-(($rdata[$r-1]/$max)* 200); //设置商品销售利润所在的纵坐标值
   $y_ht1 = 230-(($rdata[$r]/$max)*200); //设置商品销售利润所在的纵坐标值
   imageline($im,$x1*($r*2-1)+20,$y_lt1,$x*(($r+1)*2-1)+20,$y_ht1,$blue); //绘制销售利润折线图
}
  
  list($usec, $sec) = explode(" ", microtime());
  $ss=(string)((float)$usec + (float)$sec);
  $ss2=((string)$sec).(substr((string)$usec,1,strlen((string)$usec)-1));
  //echo $ss2;echo "<br>";
  imagestring($im,8,200,10,$ss,$black); 
  imagestring($im,8,200,40,$ss2,$black);
  $str=iconv("gb2312","UTF-8","9");
  imagettftext($im,150,0,180,190,$red,$fontpath,$str);
 
  echo(imagepng($im));    
  header("Content-type: image/png");
  imagedestroy($im); //释放图像资源
  header("Content-type: text/html");
  //echo $ss2;echo "<br>";
?>