PHP100精华:PHP生成柱状图

网络整理 - 08-25

  <?

  /*PHP100精华:PHP生成柱状图*/

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

  $dataName = array();

  $dataValue = array();

  $i = 0;

  $j = 0;

  $k = 0;

  $num = sizeof($data);

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

  $dataName[] = $key;

  $dataValue[] = $val;

  }

  $maxnum = max($data);

  $width = ($twidth + $tspace) * $num + 4;//image's width

  $im = imagecreate($width + 40,$height+20);

  $lineColor = imagecolorallocate($im,12,12,12);

  $bgColor = imagecolorallocate($im,255,233,233);

  $tColor = imagecolorallocate($im,123,200,56);

  imagefill($im,0,0,$bgColor);

  imageline ( $im, 30, 0, 30, $height - 2, $lineColor);

  imageline ( $im, 30, $height - 2, $width + 30 -2 , $height - 2,$lineColor);

  while($i < $num){

  imagefilledrectangle ( $im, $i * ($tspace+$twidth) + 40, $height - $dataValue[$i], $i * ($tspace+$twidth) + 40 + $twidth, $height - 3, $tColor);

  imagestringup ( $im, 4, $i * ($tspace+$twidth) + $twidth/2 + 30, $height - 10, $dataName[$i]."(".$dataValue[$i].")", $lineColor);

  $i++;

  }

  while($j <= (500/10)){

  imagestringup ( $im, 4, 2, $height - $j * 10 + 10, $j * 10, $lineColor);

  $j = $j + 10;

  }

  while($k <= (500/10)){

  if($k != 0)

  imageline ( $im, 28, $height - $k * 10, 32 , $height - $k * 10,$lineColor);

  $k = $k + 10;

  }

  imagepng($im);

  }

  header("content-type:image/png");

  $data = array("Yahoo" => 100, "Google" => 260,"Microsoft" => 320,"IBM" => 250,"Sun System" => 150,"Inter" => 220);

  createImage($data,50,25,500);

  ?>

  将这行中数据改成你的即可:$data = array("Yahoo" => 100, "Google" => 260,"Microsoft" => 320,"IBM" => 250,"Sun System" => 150,"Inter" => 220);