PHP异步执行

1.采用fsockopen方式

1function asyncGet($url)
2{
3    $parts = parse_url($url);
4    $fp = fsockopen( $parts['host'],isset($parts['port']) ? $parts['port'] : 80,$errno, $errstr, 3);
5    $out = 'GET ' . $parts['path'].'?'.$parts['query'] . " HTTP/1.1\r\nHost: " . $parts['host'] . "\r\nConnection: Close\r\n\r\n";
6    fwrite($fp, $out);
7    //usleep(10000);
8    fclose($fp);
9}

2.采用curl方式,此方式最少要等待一秒钟.

1function asyncCurl($url)
2{
3$ch = curl_init(); 
4$curl_opt = array(CURLOPT_URL=>$url,CURLOPT_TIMEOUT=>1,);
5curl_setopt_array($ch, $curl_opt);
6curl_exec($ch);
7curl_close($ch);
8}

3. fastcgi_finish_request方式,但fastcgi_finish_request太过局限性

故整合了一下函数,最终理想方式

1function async($url)
2{
3	if(function_exists('fastcgi_finish_request'))
4	{
5		fastcgi_finish_request();
6		file_get_contents($url);
7	}
8	else if (function_exists('fsockopen'))
9	{
10		$parts = parse_url($url);
11    	$fp = fsockopen( $parts['host'],isset($parts['port']) ? $parts['port'] : 80,$errno, $errstr, 3);
12    	$out = 'GET ' . $parts['path'].'?'.$parts['query'] . " HTTP/1.1\r\nHost: " . $parts['host'] . "\r\nConnection: Close\r\n\r\n";
13    	fwrite($fp, $out);
14    	//usleep(10000);
15    	fclose($fp);
16	}
17	else
18	{
19		$ch = curl_init(); 
20		$curl_opt = array(CURLOPT_URL=>$url,CURLOPT_TIMEOUT=>1,);
21		curl_setopt_array($ch, $curl_opt);
22		curl_exec($ch);
23		curl_close($ch);
24	}
25
26}