PHP 柱形统计图的实现代码

时间:2020-11-18 10:11:22 PHP 我要投稿

PHP 柱形统计图的实现代码

  效果图:

  复制代码 代码如下:

  <?php

  function createImage($data,$twidth,$tspace,$height){

  header("Content-Type:image/jpeg");

  $dataname = array();

  $datavalue = array();//data里面的值

  $i = 0;

  $j = 0;

  $k = 0;

  $num = sizeof($data);

  foreach($data as $key => $val){

  $dataname[] = $key;

  $datavalue[] = $val;

  }

  $width = $num * ($twidth + $tspace) + 20 ;//获取图像的'宽度

  $im = imagecreate($width,$height);//创建图像

  $bgcolor = imagecolorallocate($im,255,255,255);//背景色

  $jcolor = imagecolorallocate($im,255,255,0);//矩形的背景色

  $acolor = imagecolorallocate($im,0,0,0);//线的颜色

  imageline($im,25,$height-20,$width-5,$height -20,$acolor);//X轴

  imageline($im,25,$height-20,25,2,$acolor);//Y轴

  while($i< $num){

  imagefilledrectangle($im,$i*($tspace+$twidth)+40,$height-$datavalue[$i]-20,$i*($twidth+$tspace)+$tspace+40,$height-20,$jcolor);//画矩形

  imagestring($im,3,$i*($tspace+$twidth)+40+$twidth/2,$height-$datavalue[$i]-35,$datavalue[$i],$acolor);//在柱子上面写出值

  imagestring($im,3,$i*($tspace+$twidth)+40+$twidth/2,$height-15,$dataname[$i],$acolor);//在柱子下面写出值

  $i ++;

  }

  while($j < 400/10){

  imageline($im,25,($height-20)-$j*8,28,($height-20)-$j*8,$acolor);//画出刻度

  imagestring($im,2,5,($height-30)-$j*8,$j*10,$acolor);//标出刻度值

  $j = $j +10;

  }

  imagejpeg($im);

  }

  $data =array("1"=>25,"2"=>30,"3" =>21 );

  createImage($data,40,40,300);

  ?>