是否可以一次对阵列的所有成员执行一个函数？

Question

Context :

$a = array('1','2','3');
foreach ($a as $item){
  //rest of code
  //example file_get_contents(url);
  //the script waits for it to be completed before going to the next
}

The above script goes one by one.

My concern is, when a process on a single element takes too long, the remaining elements have to wait to be processed.

Is it possible to do stuff to all array items all at once?

Answer 1

Doing some search I found Rolling curl https://github.com/joshfraser/rolling-curl

I took the included example.php I make it a bit shorter

require("RollingCurl.php");
$urls = array(); // regular array, or from csv or from Database...

function request_callback($response, $info) {
    // parse the page title out of the returned HTML
    if (preg_match("~<title>(.*?)</title>~i", $response, $out)) {
        $title = $out[1];
    }
    echo "<b>$title</b>";
    print_r($info);
    echo "<hr>";
}

$rc = new RollingCurl("request_callback");
$rc->window_size = 20;
foreach ($urls as $url) {
    $request = new RollingCurlRequest($url);
    $rc->add($request);
}
$rc->execute();