Question

我按照我在网上找到的这个例子，但它无法正常工作

http://hibbard.eu/how-to-make-a-simple-visitor-counter-using-php/ co计数器显示，它确实创建了counter.txt文件我正在测试chrome中的localhost

这是我的代码：

 <!doctype html>
 <html>
 <head>
 <meta charset="utf-8">
 <title>Login Form</title>
 </head>
 <body background="images/stockvault.jpg">      
    <b><ul>THIS IS A WORK IN PROGRESS</ul></b>
    <br />  
    <br />    
    <img alt="hit counter" src="php/counter.php" />
    <br />  
    <br />      
 </body>
 </html>

然后是我的php文件：

  <?php
  session_start();
  $counter_name = "counter.txt";

 // Check if a text file exists. If not create one and initialize it to zero.
 if (!file_exists($counter_name)) {
   $f = fopen($counter_name, "w");
   fwrite($f,"0");
   fclose($f);
 }


 // Read the current value of our counter file
 $f = fopen($counter_name,"r");
 $counterVal = fread($f, filesize($counter_name));
 fclose($f);

// Has visitor been counted in this session?
// If not, increase counter value by one
 if(!isset($_SESSION['hasVisited'])){
    $_SESSION['hasVisited']="yes";
    $counterVal++;
    $f = fopen($counter_name, "w");
    fwrite($f, $counterVal);
    fclose($f); 
  }


  $counterVal = str_pad($counterVal, 5, "0", STR_PAD_LEFT);
  $chars = preg_split('//', $counterVal);

   // Change directory
   chdir("../");

  // Get current directory
  //echo getcwd();
  chdir("images");


  $im = imagecreatefrompng("images.png");
  $src1 = imagecreatefrompng("$chars[1].png");
  $src2 = imagecreatefrompng("$chars[2].png");
  $src3 = imagecreatefrompng("$chars[3].png");
  $src4 = imagecreatefrompng("$chars[4].png");
  $src5 = imagecreatefrompng("$chars[5].png");

  imagecopymerge($im, $src1, 0, 0, 0, 0, 56, 75, 100);
  imagecopymerge($im, $src2, 60, 0, 0, 0, 56, 75, 100);
  imagecopymerge($im, $src3, 120, 0, 0, 0, 56, 75, 100);
  imagecopymerge($im, $src4, 180, 0, 0, 0, 56, 75, 100);
  imagecopymerge($im, $src5, 240, 0, 0, 0, 56, 75, 100);

  header('Content-Type: image/png');
  echo (imagepng($im));
  imagedestroy($im);
 ?>

输出是：

enter image description here

Answer 1

您在PHP代码的开头忘记了这部分代码，至少在您的复制和粘贴中是这样。

session_start();
$counter_name = "counter.txt";

您需要session_start（）来处理$ _SESSION变量，并将生成的文件counter.txt设置为$ counter_name

点击计数器不显示计数器

1 个答案: