解决方案 »
- 微信,问题。微信公众平台接口获取用户发送的地理位置xml
- 请问Zend Studio 如何调用外部浏览器??
- 一个彩票系统,前台要提交很多数据上来,我怎么组合提交到后台才好呢?
- PHP疑问
- 在保存用户访问ip的时候 一般怎样获取,怎样保存 Mysql用什么字段好?
- Fatal error: Allowed memory size of 587202560 bytes exhausted (tried to allocate 493123764 bytes) in
- 怎么样读取js文件取代数据库读取
- 急!!!Wise如何打包PHP+Mysql+Apache+程序,一天内帮小弟解决,送上100分,谢谢!
- 我准备在单机上装个开发系统,要装什么东西?
- 介绍各地软件公司情况的红黑榜网站已做好,想转工的网友不能错过。
- 基础[给数组赋值]
- ckEditor3如何实现图文混排?
file_get_contents这个函数本来就不是专门用来做这个工作的,因为先天就不足,还是建议使用CURL或者SNOOPY来完成这些功能,会强大稳定并且简单很多
我一般用fsockopen
function vspider_get($url)
{
$header = array("Referer: $url");
$ch = curl_init();
$user_agent = "Baiduspider+(+http://www.baidu.com/search/spider.htm)";//这里模拟的是百度蜘蛛
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
curl_setopt($ch, CURLOPT_HTTPHEADER,$header);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1); //是否抓取跳转后的页面
curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
ob_start();
curl_exec($ch);
$contents = ob_get_contents();
ob_end_clean();
curl_close($ch);
return $contents;
}
fsockopen不错fsockopen
(PHP 4, PHP 5)fsockopen — Open Internet or Unix domain socket connection说明
resource fsockopen ( string $hostname [, int $port = -1 [, int &$errno [, string &$errstr [, float $timeout = ini_get("default_socket_timeout") ]]]] )
Initiates a socket connection to the resource specified by hostname. PHP supports targets in the Internet and Unix domains as described in 所支持的套接字传输器(Socket Transports)列表. A list of supported transports can also be retrieved using stream_get_transports(). The socket will by default be opened in blocking mode. You can switch it to non-blocking mode by using stream_set_blocking(). 参数hostname
If OpenSSL support is installed, you may prefix the hostname with either ssl:// or tls:// to use an SSL or TLS client connection over TCP/IP to connect to the remote host. port
The port number. errno
If provided, holds the system level error number that occurred in the system-level connect() call. If the value returned in errno is 0 and the function returned FALSE, it is an indication that the error occurred before the connect() call. This is most likely due to a problem initializing the socket. errstr
The error message as a string. timeout
The connection timeout, in seconds. Note: If you need to set a timeout for reading/writing data over the socket, use stream_set_timeout(), as the timeout parameter to fsockopen() only applies while connecting the socket. 返回值
fsockopen() returns a file pointer which may be used together with the other file functions (such as fgets(), fgetss(), fwrite(), fclose(), and feof()). If the call fails, it will return FALSE 错误/异常
Throws E_WARNING if hostname is not a valid domain. 更新日志
版本 说明
4.3.0 Added support for the timeout parameter on win32.
4.3.0 SSL and TLS over TCP/IP support was added.
范例Example #1 fsockopen() Example<?php
$fp = fsockopen("www.example.com", 80, $errno, $errstr, 30);
if (!$fp) {
echo "$errstr ($errno)<br />\n";
} else {
$out = "GET / HTTP/1.1\r\n";
$out .= "Host: www.example.com\r\n";
$out .= "Connection: Close\r\n\r\n";
fwrite($fp, $out);
while (!feof($fp)) {
echo fgets($fp, 128);
}
fclose($fp);
}
?>
Example #2 Using UDP connectionThe example below shows how to retrieve the day and time from the UDP service "daytime" (port 13) in your own machine. <?php
$fp = fsockopen("udp://127.0.0.1", 13, $errno, $errstr);
if (!$fp) {
echo "ERROR: $errno - $errstr<br />\n";
} else {
fwrite($fp, "\n");
echo fread($fp, 26);
fclose($fp);
}
?> 注释
Note: Depending on the environment, the Unix domain or the optional connect timeout may not be available.
Warning
UDP sockets will sometimes appear to have opened without an error, even if the remote host is unreachable. The error will only become apparent when you read or write data to/from the socket. The reason for this is because UDP is a "connectionless" protocol, which means that the operating system does not try to establish a link for the socket until it actually needs to send or receive data. Note: 当指定数值型的 IPv6 地址(例如 fe80::1)时必须用方括号将 IP 围起来——例如, tcp://[fe80::1]:80。