<?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
 
      // Filter by token value
      $aConditions = array('token'=>'123456789');
 
      // Get the filtered participants
      $participants = $myJSONRPCClient->list_participants($sSessionKey, $iSurveyID, 0, 10, false, false, $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!' );
  }
 
?>

<?php
 
  require_once 'jsonRPCClient.php';
 
  define( 'LS_BASEURL', 'https://pathTo/limeSurvey');  
  define( 'LS_USER', 'admin' );
  define( 'LS_PASSWORD', 'password' );
 
  $iSurveyID = 123456;
  $token = 123456789;
 
  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
 
      // Filter by token value
      $aConditions = array('token'=>$token);
 
      // Get the filtered participants
      $participants = $myJSONRPCClient->list_participants($sSessionKey, $iSurveyID, 0, 10, false, false, $aConditions);
 
      // Now, delete the first returned participant
      $aTokenIDs = array($participants[0]['tid']);
      $deleteParticipants = $myJSONRPCClient->delete_participants($sSessionKey, $iSurveyID, $aTokenIDs);
    }
 
    // Release the session key
    $myJSONRPCClient->release_session_key( $sSessionKey );
  }
  else { // Invalid SID format
    die( 'Invalid format!' );
  }
 
?>

$tokens = array('1234', '5678', 'abcd');      
$aConditions = array('token'=>$tokens);

foreach ($aConditions as $columnName => $valueOrTuple) {
                        if (is_array($valueOrTuple)) {
                            /** @var string[] List of operators allowed in query. */
                            $allowedOperators = ['<', '>', '>=', '<=', '=', '<>', 'LIKE'];
                            /** @var string */
                            $operator = $valueOrTuple[0];
                            if (!in_array($operator, $allowedOperators)) {
                                return array('status' => 'Illegal operator: ' . $operator);
                            } elseif ($operator === 'LIKE') {
                                /** @var mixed */
                                $value = $valueOrTuple[1];
                                $oCriteria->addSearchCondition($columnName, $value);
                            } else {
                                /** @var mixed */
                                $value = $valueOrTuple[1];
                                $oCriteria->compare($columnName, $operator . $value);
                            }
                        } elseif (is_string($valueOrTuple)) {
                            if (in_array($columnName, $aConditionFields)) {
                                $aAttributeValues[$columnName] = $valueOrTuple;
                            }
                        } else {
                            // Silent ignore?
                        }
                    }

<?php
 
  require_once 'jsonRPCClient.php';
 
  define( 'LS_BASEURL', 'https://pathTo/limeSurvey');  
  define( 'LS_USER', 'admin' );
  define( 'LS_PASSWORD', 'password' );
 
  $iSurveyID = 429116;
 
 
  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
 
      $aAttributes = array('attribute_1', 'attribute_2');
      $tokens = array('1111', '2');      
      $aConditions = array('token'=>$tokens);  
 
      $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>';
      echo '<br /><br />';
    }
 
    // Release the session key
    $myJSONRPCClient->release_session_key( $sSessionKey );
  }
  else { // Invalid SID format
    die( 'Invalid format!' );
  }
 
?>