php实现计数器方法小结
这篇文章主要介绍了php实现计数器方法,总结了三款非常实用的计数器实现方法,具有一定参考借鉴价值,需要的朋友可以参考下
本文实例讲述了php实现计数器的方法。分享给大家供大家参考。具体如下:
这里收藏了三款php计数器代码,他们三个都有一个同共点就是全部无需数据库,而是利用了文本文件来实现网页浏览计数.
第一款PHP计数器代码如下:
复制代码 代码如下:
//计数器
function countx($file="count.dat"){
if(file_exists($file)){
$fp=fopen($file,"r");
$numx=fgets($fp,10);
fclose($fp);
$numx++;
//以上四行代码可以用一条表达式代替:$numx=file_get_contents($file)+1;
}
else{
$numx=1;}
file_put_contents($file,$numx);//当文件不存在时,,这函数会自动创建文件,而且会自动把参数转成字符串写入。
echo $numx;
/*整个函数体可以用两条表达式代替:file_exists($file)?file_put_contents($file,file_get_contents($file)+1):file_put_contents($file,"1");readfile($file);
*/
}
//函数调用
countx();
?>
第二款PHP计数器,代码如下:
复制代码 代码如下:
$counterfile = "balong.txt";//存储数值的文件名几路径
function displaycounter($counterfile) {
$fp = fopen($counterfile,"rw");
$num = fgets($fp,5);
$num += 1;
print "您是第 "."$num"." 个看巴泷计数器的家伙";
exec( "rm -rf $counterfile");
exec( "echo $num > $counterfile");
}
if (!file_exists($counterfile)) {
exec( "echo 0 > $counterfile");
}
displaycounter($counterfile);
?>
第三款PHP计数器代码如下:
复制代码 代码如下:
$counterfile = "www.jb51.net.txt";//存储数值的文件名几路径
function displaycounter($counterfile) {
$fp = fopen($counterfile,"rw");
$num = fgets($fp,5);
$num += 1;
print "您是第 "."$num"." 个看巴泷计数器的家伙";
exec( "rm -rf $counterfile");
exec( "echo $num > $counterfile");
}
if (!file_exists($counterfile)) {
exec( "echo 0 > $counterfile");
}
displaycounter($counterfile);
?>
希望本文所述对大家的php程序设计有所帮助。

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