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    curl_upkeep

    (PHP 8 >= 8.2.0)

    curl_upkeep — Performs any connection upkeep checks

    Descrizione

    curl_upkeep(CurlHandle $handle): bool

    Available if built against libcurl >= 7.62.0.

    Some protocols have "connection upkeep" mechanisms. These mechanisms usually send some traffic on existing connections in order to keep them alive; this can prevent connections from being closed due to overzealous firewalls, for example.

    Connection upkeep is currently available only for HTTP/2 connections. A small amount of traffic is usually sent to keep a connection alive. HTTP/2 maintains its connection by sending a HTTP/2 PING frame.

    Elenco dei parametri

    ch

    Un identificativo cURL restituito da curl_init().

    Valori restituiti

    Restituisce true in caso di successo, false in caso di fallimento.

    Esempi

    Example #1 curl_upkeep() example

    <?php
    $url     = "https://example.com";

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTP_VERSION,CURL_HTTP_VERSION_2_0);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_UPKEEP_INTERVAL_MS, 200);
    if (    curl_exec($ch)) {
    usleep(300);
    var_dump(curl_upkeep($ch));
    }
    curl_close($ch);
    ?>

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