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PHP fopen()和 file

Jun 06, 2016 pm 07:49 PM
file fopen php

1 $file = fopen ( 11.txt , r ) or exit ( Unabletoopenfile! ); //fopen打开文件,如果不存在就显示打不开。 2 $filesize = filesize ( 11.txt ); //计算文件大小 3 echo fread ( $file , $filesize ); //读取文件 4 fclose( $file ); //关闭文件 fopen(

1 $file=fopen("11.txt","r")or exit("Unable to open file!");//fopen打开文件,如果不存在就显示打不开。

2     $filesize =filesize("11.txt");//计算文件大小

3     echo fread($file,$filesize);//读取文件

4     fclose($file);//关闭文件

fopen()打开文件例子,

fclose()用不用在页面上都没有体现,但是如果不用fclose()的话,被打开的文件会一直占用资源。



fopen (  )打开网址例子:

1 $web="http://www.baidu.com";    // http:// 不加的话就无法加载

2 $fp=fopen($web,'r');

3     if($fp){

4     while(!feof($fp)){

5     echo fgets($fp);

6     }

7     }

feof()检查文件是否到末端  ,到末端返回1,没有到返回0;

fgets()是逐行读取。


file_get_contents()例子;

1  $web ="http://www.baidu.com "    

2     $fcontent=file_get_contents($web);

3     echo $fcontent;

 显然file_get_contents()更为简单。

而且在实验过程中我发现,如果在 $web =""中 不加www. 会直接跳转,加www.会在本页加载。

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