list_participants(string $sSessionKey,integer $iSurveyID,integer $iStart,integer $iLimit = 10,boolean $bUnused = false,boolean|array $aAttributes = false,array $aConditions = array()): array

<?php
 
  require_once 'jsonRPCClient.php';
 
  define( 'LS_BASEURL', 'https://pathTo/limeSurvey');  
  define( 'LS_USER', 'admin' );
  define( 'LS_PASSWORD', 'password' );
 
  $iSurveyID = 123456;
 
 
  if(ctype_alnum($iSurveyID) &amp;&amp; (strlen($iSurveyID) == 5 || strlen($iSurveyID) == 6)) { // Valid SID format
 
    // Instantiate a new RPC client
    $myJSONRPCClient = new jsonRPCClient( LS_BASEURL.'/index.php/admin/remotecontrol' );
 
    // Get a session key
    $sSessionKey= $myJSONRPCClient->get_session_key( LS_USER, LS_PASSWORD );
 
    if(is_array($sSessionKey)) { // Invalid session
      echo $sSessionKey['status'];
    }
    else if($sSessionKey) { // Valid session
 
      // Define the additional attributes to be returned
      $aAttributes = array('attribute_1', 'attribute_2');
      // Define filters for participants
      $aConditions = array('lastname'=>'Doe', 'attribute_1'=>'xyz');
 
      // Get the filtered participants
      $participants = $myJSONRPCClient->list_participants($sSessionKey, $iSurveyID, 0, 10, false, $aAttributes, $aConditions);
 
      // Print the results
      echo '<ul>';
      foreach($participants as $key => $value) {
        echo '<li>';
          print_r($value);
        echo '</li>';
      }
      echo '</ul>';
    }
 
    // Release the session key
    $myJSONRPCClient->release_session_key( $sSessionKey );
  }
  else { // Invalid SID format
    die( 'Invalid format!' );
  }
 
?>