PHP socket模拟POST请求

<?php
if (! function_exists ( 'socket_post' )) {
	function socket_post($url, $data, $referer = '') {
		if (! is_array ( $data )) {
			return;
		}
		$data = http_build_query ( $data );
		$url = parse_url ( $url );
		if (empty ( $url ['scheme'] ) || $url ['scheme'] != 'http') {
			die ( "Error: Only HTTP request are supported !" );
		}
		$host = $url ['host'];
		$path = isset ( $url ['path'] ) ? $url ['path'] : '/';
		// open a socket connection on port 80 - timeout: 30 sec
		$fp = fsockopen ( $host, 80, $errno, $errstr, 30 );
		if ($fp) {
			// send the request headers:
			$length = strlen ( $data );
			$POST = <<<HEADER
POST {$path} HTTP/1.1
Accept: text/plain, text/html
Referer: {$referer}
Accept-Language: zh-CN,zh;q=0.8
Content-Type: application/x-www-form-urlencode
Cookie: token=value; pub_cookietime=2592000; pub_sauth1=value; pub_sauth2=value
User-Agent: Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.17 (KHTML, like Gecko) Chrome/24.0.1312.56 Safari/537.17
Host: {$host}
Content-Length: {$length}
Pragma: no-cache
Cache-Control: no-cache
Connection: close\r\n
{$data}
HEADER;
			fwrite ( $fp, $POST );
			$result = '';
			while ( ! feof ( $fp ) ) {
				// receive the results of the request
				$result .= fread ( $fp, 512 );
			}
		} else {
			return array (
					'status' => 'error',
					'error' => "$errstr ($errno)" 
			);
		}
		
		// close the socket connection:
		fclose ( $fp );
		
		// split the result header from the content
		$result = explode ( "\r\n\r\n", $result, 2 );
		
		// return as structured array:
		return array (
				'status' => 'ok',
				'header' => isset ( $result [0] ) ? $result [0] : '',
				'content' => isset ( $result [1] ) ? $result [1] : '' 
		);
	
}
}
print_r ( socket_post ( 'http://blog.51cto.com/', array (
		'name=' => 'qiufeng',
		'password' => md5 ( 'www.fengdingbo.com' ) 
) ) );
?>