在data文件中写入数据：

<?php

/**

* Created by PhpStorm.

* User: Administrator

* Date: 2015/6/29

* Time: 17:05

*/

header("Content-type: text/html; charset=utf-8");

//write data

$f = fopen('data','w');//打开文件

fwrite($f,'Hello PHP');//写入数据

fclose($f);//关闭文件

echo 'OK';

//windows环境暂时不考虑权限问题

写入成功后可以在页面看到“OK”

接下来读取data文件里的数据

<?php

/**

* Created by PhpStorm.

* User: Administrator

* Date: 2015/6/29

* Time: 17:05

*/

header("Content-type: text/html; charset=utf-8");

//read data

$f = fopen('data','r');

$content = fgets($f);

echo $content;

fclose($f);

如果有多行数据该怎么读取？

方法一 while：

<?php

/**

* Created by PhpStorm.

* User: Administrator

* Date: 2015/6/29

* Time: 17:05

*/

header("Content-type: text/html; charset=utf-8");

$f = fopen('data','r');

//读取多行数据 while

while(!feof($f)){//feof() 函数检测是否已到达文件末尾

$content = fgets($f);

echo $content;

}

fclose($f);

方法二 file_get_contents()：

echo file_get_contents('data');

以上所述就是本文的全部内容了，希望大家能够喜欢。