本文主要和大家分享PHP实现发送异步请求方法，最近在工作中多次碰到需要用到PHP异步请求的问题，所以在网上查找了相关的资料。经过多次的测试和修改，总结了两种普遍可行的的方案：
1、方案一：使用CURL，但必须设置CUROPT_TIMEOUT为1。
function _curl($url, $data=null, $timeout=0, $isProxy=false){
$curl = curl_init();
if($isProxy){ //是否设置代理
$proxy = "127.0.0.1"; //代理IP
$proxyport = "8001"; //代理端口
curl_setopt($curl, CURLOPT_PROXY, $proxy.":".$proxyport);
}
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
if(!empty($data)){
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
curl_setopt($curl, CURLOPT_HTTPHEADER, array(
"cache-control: no-cache",
"content-type: application/json",)
);
}
curl_setopt($curl, CURLOPT_RETURNTRANSFER, TRUE);
if ($timeout > 0) { //超时时间秒
curl_setopt($curl, CURLOPT_TIMEOUT, $timeout);
}
$output = curl_exec($curl);
$error = curl_errno($curl);
curl_close($curl);
if($error){
return false;
}
return $output;
}
_curl('http://localhost/index.php',null,1);
2、方案二：使用fsockopen，但需要自己拼出HTTP的header部分
function _fsockopen($url,$post_data=array(),$cookie=array()){
$url_arr = parse_url($url);
$port = isset($url_arr['port'])?$url_arr['port']:80;
if($url_arr['scheme'] == 'https'){
$url_arr['host'] = 'ssl://'.$url_arr['host'];
}
$fp = fsockopen($url_arr['host'],$port,$errno,$errstr,30);
if(!$fp) return false;
$getPath = isset($url_arr['path'])?$url_arr['path']:'/index.php';
$getPath .= isset($url_arr['query'])?'?'.$url_arr['query']:'';
$method = 'GET'; //默认get方式
if(!empty($post_data)) $method = 'POST';
$header = "$method $getPath HTTP/1.1\r\n";
$header .= "Host: ".$url_arr['host']."\r\n";
if(!empty($cookie)){ //传递cookie信息
$_cookie = strval(NULL);
foreach($cookie AS $k=>$v){
$_cookie .= $k."=".$v.";";
}
$cookie_str = "Cookie:".base64_encode($_cookie)."\r\n";
$header .= $cookie_str;
}
if(!empty($post_data)){ //传递post数据
$_post = array();
foreach($post_data AS $_k=>$_v){
$_post[] = $_k."=".urlencode($_v);
}
$_post = implode('&', $_post);
$post_str = "Content-Type:application/x-www-form-urlencoded; charset=UTF-8\r\n";
$post_str .= "Content-Length: ".strlen($_post)."\r\n"; //数据长度
$post_str .= "Connection:Close\r\n\r\n";
$post_str .= $_post; //传递post数据
$header .= $post_str;
}else{
$header .= "Connection:Close\r\n\r\n";
}
fwrite($fp, $header);
//echo fread($fp,1024);
usleep(1000); // 这一句也是关键，如果没有这延时，可能在nginx服务器上就无法执行成功
fclose($fp);
return true;
}
_fsockopen('http://localhost/index.php'));相关推荐：
