PHP的fsockopen、pfsockopen函数被主机商禁用的解决办法_php实例
也许fsockopen、pfsockopen函数的确存在着安全的隐患,但是我们却已经无从考证,这都是IDC商说的,不管是什么原因吧,反正他们是把这两个函数禁用了,那么如何解决呢,下面是小编整理的方法,希望对用到的同学有一定的参考。
解决方法如下:
一、使用stream_socket_client()替代
服务器同时禁用了fsockopen、pfsockopen,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,将原fsockopen函数中的端口参数“80”删掉,并加到$host。
示例如下:
修改前:
或
修改后:
或
二、重写法
如果PHP版本低于5.0,fsockopen被禁用,又没有stream_socket_client()怎么办呢?自己写一个函数实现fsockopen的功能,参考代码:
function b_fsockopen($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,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( 。
以上的方法中,我用stream_socket_client()替代问题解决,第二个方法没有去试。

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