Persistent/keepalive HTTP with the PHP Curl library? - Stack Overflow

Persistent/keepalive HTTP with the PHP Curl library? - Stack Overflow:

Curl sends the keep-alive header by default, but:

1. create a context using curl_init() without any parameters.
2. store the context in a scope where it will survive (not a local var)
3. use CURLOPT_URL option to pass the url to the context
4. execute the request using curl_exec()
5. don't close the connection with curl_close()

very basic example:

function get($url) {
    global $context;
    curl_setopt($context, CURLOPT_URL, $url);
    return curl_exec($context);
}

$context = curl_init();
//multiple calls to get() here
curl_close($context);