PHP异步处理方法

1、使用前端Ajax处理

$.ajax("do.php", { name: "ityangs",job:"PHP Programmer"} );

2、使用popen函数执行本地文件

pclose(popen("php /var/www/do.php &", "r"));

3、使用CURL

设置curl的超时时间 CURLOPT_TIMEOUT 为1 （最小为1），因此客户端需要等待1秒，curl请求地址必须为绝对路径

$param = array(
"name"=>"ityangs",
"job"=>"PHP Programmer"
);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,"http://www.example.com/do.php");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($param)); //将数组转换为URL请求字符串
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_TIMEOUT, 1);
curl_exec($ch);
curl_close($ch);

4、使用fsockopen函数,需要自己拼接header部分

function doRequest($url, $param=array(),$timeout =10){
$urlParmas = parse_url($url);
$host = $urlParmas["host"];
$path = $urlParmas["path"];
$port = isset($urlParmas["port"])? $urlParmas["port"] :80;
$errno = 0;
$errstr = "";

$fp = fsockopen($host, $port, $errno, $errstr, $timeout);
$query = isset($param)? http_build_query($param) : "";
$out = "POST ".$path." HTTP/1.1
";
$out .= "host:".$host."
";
$out .= "content-length:".strlen($query)."
";
$out .= "content-type:application/x-www-form-urlencoded
";
$out .= "connection:close

";
$out .= $query;

fputs($fp, $out);
fclose($fp);
}
$url = "http://www.example.com/do.php";
$param = array(
"name"=>"ityangs",
"job"=>"PHP Programmer"
);
doRequest($url, $param);

注意：
1、如果使用Apache作为Web服务器，让PHP支持异步首先必须得在Apache配置文件httpd.conf配置enablesendfile
on。
2、在异步执行的PHP文件中建议加上一下两个配置：

ignore_user_abort(true); // 忽略客户端断开
set_time_limit(0); // 设置执行不超时