php定时计划任务与持续进程(fsockopen)实例

<? 
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/1.1rn"; 
  $header .= "Host: ". $url_array['host'] . "rn "; //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 rn";
  $header .= "Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,q=0.5 rn";
  $header .= "Accept-Language: en-us,en;q=0.5 ";
  $header .= "Accept-Encoding: gzip,deflatern";
   */ 
 
  $header .= "Connection:Closern"; 
  if(!empty($cookie)){ 
    $_cookie = strval(NULL); 
    foreach($cookie as $k => $v){ 
$_cookie .= $k."=".$v."; "; 
    } 
    $cookie_str =  "Cookie: " . base64_encode($_cookie) ." rn"; //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-urlencodedrn";  
    $post_str .= "Content-Length: ". strlen($_post) ." rn"; //POST数据的长度 
    $post_str .= $_post."rnrn "; //传递POST数据 
    $header .= $post_str; 
  } 
  fwrite($fp, $header); 
  //echo fread($fp, 1024); //服务器返回 
  fclose($fp); 
  return true; 
}   

<?php 
　　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:
<?php 
　　register_shutdown_function(callback fuction[, parameters]); //注册脚本退出时执行的函数