php计数器的简单代码举例

3. /*

4. * 例1，文本文件记录数据
5. * edit bbs.it-home.org
6. */
7. $counter=1;
8. if(file_exists("mycounter.txt")){
9. $fp=fopen("mycounter.txt","r");
10. $counter=fgets($fp,9);
11. $counter++;
12. fclose($fp);
13. }
14. $fp=fopen("mycounter.txt","w");
15. fputs($fp,$counter);
16. fclose($fp);
17. echo "

    您是第".$counter."次访问本页面！

    ";

18. //例2，基于数据库的简单计数器

19. $conn=mysql_connect("localhost","root","abc");
20. $result=mysql_query("use db_counter");
21. $re=mysql_query("select * from tb_counter");
22. $result=mysql_fetch_row($re);
23. $counter=$result[0];
24. echo "您是第{$counter}位访问者！";
25. $counter+=1;echo "

    ---

    {$counter}";
26. mysql_query("update tb_counter set counter=$counter");
27. mysql_close($conn);
28. //只是一个简单的计数器，大家可以加入防止重复刷新的功能
29. ?>

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