深入PHP异步执行的详解

<?
function triggerRequest($url, $post_data = array(), $cookie = array()){
$method = "GET"; //通过POST或者GET传递一些参数给要触发的脚本
$url_array = parse_url($url); //获取URL信息
$port = isset($url_array['port'])? $url_array['port'] : 80;
$fp = fsockopen($url_array['host'], $port, $errno, $errstr, 30);
if (!$fp) {
return FALSE;
}
$getPath = $url_array['path'] ."?". $url_array['query'];
if(!empty($post_data)){
$method = "POST";
}
$header = $method . " " . $getPath;
$header .= " HTTP/1.1/r/n";
$header .= "Host: ". $url_array['host'] . "/r/n "; //HTTP 1.1 Host域不能省略
/*以下头信息域可以省略
$header .= "User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.13) Gecko/20080311 Firefox/2.0.0.13 /r/n";
$header .= "Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,q=0.5 /r/n";
$header .= "Accept-Language: en-us,en;q=0.5 ";
$header .= "Accept-Encoding: gzip,deflate/r/n";
*/
$header .= "Connection:Close/r/n";
if(!empty($cookie)){
$_cookie = strval(NULL);
foreach($cookie as $k => $v){
$_cookie .= $k."=".$v."; ";
}
$cookie_str = "Cookie: " . base64_encode($_cookie) ." /r/n"; //传递Cookie
$header .= $cookie_str;
}
if(!empty($post_data)){
$_post = strval(NULL);
foreach($post_data as $k => $v){
$_post .= $k."=".$v."&";
}
$post_str = "Content-Type: application/x-www-form-urlencoded/r/n";
$post_str .= "Content-Length: ". strlen($_post) ." /r/n"; //POST数据的长度
$post_str .= $_post."/r/n/r/n "; //传递POST数据
$header .= $post_str;
}
fwrite($fp, $header);
//echo fread($fp, 1024); //服务器返回
fclose($fp);
return true;
}

<?
　 ignore_user_abort(TRUE);//如果客户端断开连接，不会引起脚本abort
　　set_time_limit(0);//取消脚本执行延时上限
　　或使用:
<?
　　register_shutdown_function(callback fuction[, parameters]);//注册脚本退出时执行的函数