发送请求

send_request_by_fsockopen.php

<?php
function send_request_by_fsockopen($url,$post_data=array()){
	$url_array = parse_url($url);
	$hostname = $url_array['host'];
	$port = isset($url_array['port'])? $url_array['port'] : 80;
	$requestPath = $url_array['path'] ."?". $url_array['query'];
	$fp = fsockopen($hostname, $port, $errno, $errstr, 10);
	if (!$fp) {
	    echo "$errstr ($errno)";
	    return false;
	}
	$method = "GET";
	if(!empty($post_data)){
	    $method = "POST";
	}
	$header = "$method $requestPath HTTP/1.1\r\n";
	$header.= "Host: $hostname\r\n";
	if(!empty($post_data)){
	    $_post = strval(NULL);
	    foreach($post_data as $k => $v){
	        $_post[]= $k."=".urlencode($v);//必须做url转码以防模拟post提交的数据中有&符而导致post参数键值对紊乱
	    }
	    $_post = implode('&', $_post);
	    $header .= "Content-Type: application/x-www-form-urlencoded\r\n";//POST数据
	    $header .= "Content-Length: ". strlen($_post) ."\r\n";//POST数据的长度
	    $header .= "Connection: Close\r\n\r\n";//长连接关闭
	    $header .= $_post; //传递POST数据
	}else{
	    $header .= "Connection: Close\r\n\r\n";//长连接关闭
	}
	fwrite($fp, $header);
	fclose($fp);
}