学步园

展示一个简单的图形计数器（本blog使用的计数器），代码如下。

<?
Header("Content-type: image/PNG");
function CreateFile($filename,$content)
{            
        if (is_file ($filename))
        {
                @unlink ($filename);
        }
              $handle    = fopen ($filename,"w"); //打开文件指针，创建文件
              /*
            　检查文件是否被创建且可写
              */
              if (!is_writable ($filename))
              {
                 die ("文件：".$filename."不可写，请检查其属性后重试！");
              }
              if (!fwrite ($handle,$content))
              {  //将信息写入文件
                 die ("生成文件".$filename."失败！");
              }
            //  echo "<br>写入文件".$filename;
              fclose ($handle); //关闭指?
}
srand((double)microtime()*1000000);
$counterfile = 'blogcounter.txt';
$counter = @file_get_contents($counterfile );
$content = $counter+1;
@CreateFile($counterfile,$content);
$len = strlen($counter);
$im = imagecreate(($len+1)*10+5,15);
$black = ImageColorAllocate($im, 0,255,0);
$white = ImageColorAllocate($im, 255,255,255);
$green = ImageColorAllocate($im, 223,11,216);
//imagefill($im,45,18,$white);
imagefilledrectangle($im,0,0,($len+1)*10+5,20,$white);
//将计数器绘入图片
@ImageTTFText($im, 8,0, 5,12, $green, "counter.ttf",$counter);
//imagestring($im, 4, 4, 1, $HTTP_GET_VARS['authnum'], $green);
for($i=0;$i<200;$i++) //加入干扰象素
{
    imagesetpixel($im, rand()%50 , rand()%50 , $black);
}
ImagePNG($im);
ImageDestroy($im);
?>

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