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PHP简单计数器实例程序

Jun 13, 2016 am 09:51 AM
php under device exist Example us of program Simple statistics website Own counter access page

在php中我们有时自己会写简单的网站页面访问统计器了,下面小编来给大家介绍利用PHP实现计数器代码,希望此方法对大家有帮助。

让我们在首页上加上一个计数器。有利于演示怎样读写文件以及创建自己的函数。counter.inc包含以下代码:

 代码如下 复制代码


/*
|| 一个简单的计数器
*/
function get_hitcount($counter_file)
{
/* 将计数器归零
这样如果计数器还未被使用,初始值将是1
你当然也可以把初始值设成20000来骗人咯
*/
$count=0;
// 如果存放计数器文件已经存在,读取其中的内容
if ( file_exists($counter_file) )
{
$fp=fopen($counter_file,"r");
// 我们只取了前20位,希望你的站点不要太受欢迎啊
$count=0 fgets($fp,20);
// 由于函数fgets()返回字符串,我们可以通过加0的方法将其自动转换为整数
fclose($fp);
// 对文件操作完毕
}
// 增加一次计数值
$count ;
// 将新的计数值写入文件
$fp=fopen($counter_file,"w");
fputs($fp,$count);
fclose($fp);
# 返回计数值
return ($count);
}
?>

然后我们更改front.php3文件以显示这个计数器:


include("include/counter.inc");
// 我把计数值放在文件counter.txt中,读出并输出
printf ("

d

n",
get_hitcount("counter.txt"));
include("include/footer.inc");
?>

例2

 代码如下 复制代码

1)文本计数器
$countfile="/count.txt";  //设置保存数据的文件
if (!file_exists($countfile)){//判断文件是否存在
exec( "echo 0 > $countfile");
}
$fp = fopen($countfile,"rw");
$length=filesize($countfile);
$num = fgets($fp,$length);
$num += 1;
exec( "rm -rf $countfile");
exec( "echo $num > $countfile");
PRint "访问量总计:"."$num"."人次";  //显示访问次数
?>
2)图形计数器

$countfile="/count-num.txt";  //设置保存数据的文件
if (!file_exists($countfile))  //判断文件是否存在
{exec( "echo 0 > $countfile");}
$fp = fopen($countfile,"rw");
$length=filesize($countfile);
$num = fgets($fp,$length);
$num += 1;
exec( "rm -rf $countfile");
exec( "echo $num > $countfile");
$len_str = strlen($num);
for($i=0;$i $each_num = substr($num,$i,1);
$out_str = $out_str . "PHP简单计数器实例程序";
}
print "访问量总计:"."$out_str"."人次";  //显示访问次数

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