Ho provato subito il codice che mi hai fornito tu, ma non funziona... ho provato a modificarlo un po' ma non funziona lo stesso...

Codice PHP:
<?php

    static $PROFILE_ID = "il mio id";
    
    $access_token = $PROFILE_ID . "|stringa access token";
    $url_feed = "https://graph.facebook.com/" . $PROFILE_ID . "/feed";

    $message = "Hello, World";

    $data = array(
                     'access_token' => $access_token,
                     'message'        => $message
    );

    //prova per vedere se i dati sono corretti
    echo "Access token: " . $access_token . "
";
    echo "Url feed: " . $url_feed . "
";
    echo "Messaggio: " . $message . "
";
    echo "Data contiene: "; print_r($data);
    
    $curl = curl_init(); 
    curl_setopt($tuCurl, CURLOPT_URL, $url_feed);
    curl_setopt($tuCurl, CURLOPT_VERBOSE, 0);
    curl_setopt($tuCurl, CURLOPT_HEADER, 0);
    curl_setopt($tuCurl, CURLOPT_POST, 1);
    curl_setopt($tuCurl, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($tuCurl, CURLOPT_POSTFIELDS, $data);
    curl_exec($curl);

    if(!curl_errno($curl)){
      $info = curl_getinfo($curl);
      echo 'Took ' . $info['total_time'] . ' seconds to send a request to ' . $info['url'];
    } else {
      echo 'Curl error: ' . curl_error($curl);
    }

    curl_close($curl);

?>
Mi restituisce questo:
codice:
Warning: curl_setopt(): supplied argument is not a valid cURL handle resource in /path/prova_invio.php on line 22

Warning: curl_setopt(): supplied argument is not a valid cURL handle resource in /path/prova_invio.php on line 23

Warning: curl_setopt(): supplied argument is not a valid cURL handle resource in /path/prova_invio.php on line 24

Warning: curl_setopt(): supplied argument is not a valid cURL handle resource in /path/prova_invio.php on line 25

Warning: curl_setopt(): supplied argument is not a valid cURL handle resource in /path/prova_invio.php on line 26

Warning: curl_setopt(): supplied argument is not a valid cURL handle resource in /path/prova_invio.php on line 27
Curl error: No URL set!
ho provato a passargli l'url come parametro:
Codice PHP:
    $curl = curl_init($url_feed); 
ma mi restituisce gli stessi errori, tranne alla fine che al posto di Curl error: No URL set! dice:

{"data":[]}Took 1.202689 seconds to send a request to https: //graph.facebook.com/il mio id/feed

quindi l'url lo prende, ma non lo considera valido... come mai?