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浅析虚拟主机服务器php fsockopen函数被禁用的解决办法

Jun 06, 2016 pm 08:28 PM
php

以下是对虚拟主机服务器php fsockopen函数被禁用的解决方法进行了详细的分析介绍,需要的朋友可以过来参考下

一、如何禁用fsockopen()
下面是两种常用的禁用fsockopen的方法。
1、修改php.ini,将 disable_functions = 后加入 fsockopen
2、修改php.ini,将 allow_url_fopen = On 改为 allow_url_fopen = Off

二、如何解决fsockopen函数被禁用
1、如果服务器没有同时禁用pfsockopen,那么直接将fsockopen函数替换为pfsockopen。
具体操作:搜索程序中的字符串 fsockopen( 替换为 pfsockopen( 。示例如下
修改前:
$fp = fsockopen($host, 80, $errno, $errstr, 30);
修改后:
$fp = pfsockopen($host, 80, $errno, $errstr, 30);
2、如果服务器同时禁用了pfsockopen,香港服务器,那么用其他函数代替,如stream_socket_client()。注意:stream_socket_client()和fsockopen()的参数不同。
具体操作:搜索程序中的字符串 fsockopen( 替换为 stream_socket_client( ,然后,服务器空间,将原fsockopen函数中的端口参数“80”删掉,并加到$host。示例如下
修改前:
$fp = fsockopen($host, 80, $errno, $errstr, 30);
修改后
$fp = stream_socket_client($host."80", $errno, $errstr, 30);
3、如果PHP版本低于5.0,fsockopen被禁用,又没有stream_socket_client()怎么办呢?自己写一个函数实现fsockopen的功能,参考代码:

复制代码 代码如下:


function b_fsockopen($host, $port, &$errno, &$errstr, $timeout) {
 $ip = gethostbyname($host);
 $s = socket_create(AF_INET, SOCK_STREAM, 0);
 if (socket_set_nonblock($s)) {
  $r = @socket_connect($s, $ip, $port);
  if ($r || socket_last_error() == EINPROGRESS) {
   $errno = EINPROGRESS;
   return $s;
  }
 }
 $errno = socket_last_error($s);
 $errstr = socket_strerror($errno);
 socket_close($s);
 return false;
}


具体操作:1.首先找到使用fsockopen函数的代码段,将上面代码加至其上端,搜索该代码段中的字符串 fsockopen( 替换为 b_fsockopen( 。
2.因为fsockopen函数返回文件指针所以可以被文件函数操作,但是这个b_fsockopen函数没能返回文件指针,服务器空间,需要继续修改代码段:用socket_read( 替换掉 fread( ,用socket_write( 替换掉fwrite( ,用socket_close( 替换掉fclose( 。
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