PHP文件操作方法汇总

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。