我认为这里需要一些关于 cURL 解决方案的代码，所以我将分享我的（它是混合了几个来源作为 PHP 手册和评论编写的）。
它执行一些并行 HTTP 请求（域中的域$aURLs），并在每个请求完成后打印响应（并将它们存储起来以$done供其他可能的用途）。
由于实时打印部分和过多的注释，代码比需要的要长，但请随时编辑答案以改进它：
<?php
/* Strategies to avoid output buffering, ignore the block if you don't want to print the responses before every cURL is completed */
ini_set('output_buffering', 'off'); // Turn off output buffering
ini_set('zlib.output_compression', false); // Turn off PHP output compression
//Flush (send) the output buffer and turn off output buffering
ob_end_flush(); while (@ob_end_flush());
apache_setenv('no-gzip', true); //prevent apache from buffering it for deflate/gzip
ini_set('zlib.output_compression', false);
header("Content-type: text/plain"); //Remove to use HTML
ini_set('implicit_flush', true); // Implicitly flush the buffer(s)
ob_implicit_flush(true);
header('Cache-Control: no-cache'); // recommended to prevent caching of event data.
$string=''; for($i=0;$i<1000;++$i){$string.=' ';} output($string); //Safari and Internet Explorer have an internal 1K buffer.
//Here starts the program output
function output($string){
ob_start();
echo $string;
if(ob_get_level()>0) ob_flush();
ob_end_clean(); // clears buffer and closes buffering
flush();
}
function multiprint($aCurlHandles,$print=true){
global $done;
// iterate through the handles and get your content
foreach($aCurlHandles as $url=>$ch){
if(!isset($done[$url])){ //only check for unready responses
$html = curl_multi_getcontent($ch); //get the content
if($html){
$done[$url]=$html;
if($print) output("$html".PHP_EOL);
}
}
}
};
function full_curl_multi_exec($mh, &$still_running) {
do {
$rv = curl_multi_exec($mh, $still_running); //execute the handles
} while ($rv == CURLM_CALL_MULTI_PERFORM); //CURLM_CALL_MULTI_PERFORM means you should call curl_multi_exec() again because there is still data available for processing
return $rv;
}
set_time_limit(60); //Max execution time 1 minute
$aURLs = array("http://domain/script1.php","http://domain/script2.php"); // array of URLs
$done=array(); //Responses of each URL
//Initialization
$aCurlHandles = array(); // create an array for the individual curl handles
$mh = curl_multi_init(); // init the curl Multi and returns a new cURL multi handle
foreach ($aURLs as $id=>$url) { //add the handles for each url
$ch = curl_init(); // init curl, and then setup your options
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1); // returns the result - very important
curl_setopt($ch, CURLOPT_HEADER, 0); // no headers in the output
$aCurlHandles[$url] = $ch;
curl_multi_add_handle($mh,$ch);
}
//Process
$active = null; //the number of individual handles it is currently working with
$mrc=full_curl_multi_exec($mh, $active);
//As long as there are active connections and everything looks OK…
while($active && $mrc == CURLM_OK) { //CURLM_OK means is that there is more data available, but it hasn't arrived yet.
// Wait for activity on any curl-connection and if the network socket has some data…
if($descriptions=curl_multi_select($mh,1) != -1) {//If waiting for activity on any curl_multi connection has no failures (1 second timeout)
usleep(500); //Adjust this wait to your needs
//Process the data for as long as the system tells us to keep getting it
$mrc=full_curl_multi_exec($mh, $active);
//output("Still active processes: $active".PHP_EOL);
//Printing each response once it is ready
multiprint($aCurlHandles);
}
}
//Printing all the responses at the end
//multiprint($aCurlHandles,false);
//Finalize
foreach ($aCurlHandles as $url=>$ch) {
curl_multi_remove_handle($mh, $ch); // remove the handle (assuming you are done with it);
}
curl_multi_close($mh); // close the curl multi handler
?>