Moodle webservice client sample

moodle_update_user_webservices.php

<?php

/**
 * Send a Post request
 *
 * @param string $moodleFunction
 * @param array  $data
 *
 * @return array
 */
function sendPostRequest($moodleFunction = '', $data = []) {
   
    $defaultMoodleUrl = 'https://moodle.domein.nl/webservice/rest/server.php';
    $moodleToken = 'e3e7dcf14c5aa958c412642c1b339fc1';

    $ch = curl_init();
    curl_setopt_array($ch, [
        CURLOPT_URL => sprintf("%s?wstoken=%s&wsfunction=%s&moodlewsrestformat=json", $defaultMoodleUrl, $moodleToken, $moodleFunction),
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_ENCODING => "",
        CURLOPT_MAXREDIRS => 10,
        CURLOPT_TIMEOUT => 0,
        CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
        CURLOPT_CUSTOMREQUEST => "POST",
        CURLOPT_POSTFIELDS => $data,
    ]);

    $response = curl_exec($ch);
    $status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    $error = curl_error($ch);

    if ($status !== 200) {
        throw new Exception('Curl invalid response code : ' . $status);
    }

    if (!empty($error)) {
        throw new Exception("Curl error message: " . $error);
    }

    // If there's an error we stop and throw a error, all request should be correct.
    $response = json_decode($response, true);

    // For debugging purpose we show all responses.
    // echo '<pre>DEBUGGING:';
    // print_r($data);
    // print_r($response);
    // echo '</pre>';

    return $response;
}


$userData = [
    'users[0][username]' => 'piet1', //Username policy is defined in Moodle security config.
    'users[0][password]' => 'Piet1234!', //Plain text password consisting of any characters
    'users[0][firstname]' => 'Piet', //The first name(s) of the user
    'users[0][lastname]' => 'Test', //The family name of the user
    'users[0][email]' => '[email protected]',   //A valid and unique email address
    'users[0][idnumber]' => '', //An arbitrary ID code number perhaps from the institution
    
    // Optional profile fields.
    //'users[0][customfields][0][type]' => 'iban',
    //'users[0][customfields][0][value]' => '51252151325',
];

try{
   // Create. 
   $response = sendPostRequest("core_user_create_users", $userData);  
   
   // Update.
   $response = sendPostRequest("core_user_update_users", $userData);
   
   // Get user. 
   $response = sendPostRequest("core_user_get_users", [
      'criteria[0][key]' => 'email', // Search
      'criteria[0][value]' => '[email protected]', // Value
   ]);
  
   // Get user. 
   $response = sendPostRequest("core_user_delete_users", [
      'userids[0]' => 3000,  //user ID
   ]);
   
   
   
 var_dump($response);
 
}catch(Exception $exception){
    echo 'Caught exception: ',  $e->getMessage(), "\n";
}

Instead of curl directly you could use Guzzle.
http://docs.guzzlephp.org/en/stable/quickstart.html

Offline webservice documents:
https://www.dropbox.com/s/czgvycswco4llqh/Web%20services%20API%20Documentation%20-%203.9%20.zip?dl=0

Moodle
https://docs.moodle.org/dev/Creating_a_web_service_client