How to Make Asynchronous GET Requests in PHP?

Asynchronous GET Request in PHP

Making an asynchronous GET request in PHP can be achieved in a few different ways. One straightforward method is to use the file_get_contents() function. To retrieve the content from an external script using file_get_contents(), simply specify the URL as the parameter. The result can be stored in a variable for further processing or echoing.

$output = file_get_contents('http://www.example.com/');
echo $output;

Another approach is to fire off the GET request without waiting for a response using the curl_post_async() function. This function opens a socket, sends the request, and immediately closes the socket, returning control of the script without blocking.

function curl_post_async($url, $params)
{
    // ... code to parse the URL and prepare the request ...
    $fp = fsockopen($parts['host'],
        isset($parts['port'])?$parts['port']:80,
        $errno, $errstr, 30);

    $out = "POST ".$parts['path']." HTTP/1.1\r\n";
    $out.= "Host: ".$parts['host']."\r\n";
    // ... code to set up the request headers and body ...

    fwrite($fp, $out);
    fclose($fp);
}

By utilizing these techniques, you can make both synchronous and asynchronous GET requests in PHP, allowing you to send requests without blocking the script's execution.

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