Summary of PHP file operation methods, _PHP tutorial

Summary of PHP file operation methods,

Write data in the data file:

 <&#63;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

After successful writing, you can see "OK" on the page

Next read the data in the data file

<&#63;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);

How to read if there are multiple rows of data?

Method 1 while:

<&#63;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);

Method 2 file_get_contents():

echo file_get_contents('data');

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