Infusionsoft Custom Field Lookup

custom_field_lookup.php

<?php

  // Require Infusionsoft PHP-SDK: https://github.com/infusionsoft/PHP-iSDK
  require_once('isdk.php');
  
  $api = new iSDK;
  $api->cfgCon('appname');
  
  // What code was entered?
  $code = $_POST['code'];
  
  // Query and Return Field arrays
  $query = array('_CustomFieldName' => $code);
  $return = array('Id');

  $contact = $api->dsQuery('Contact', 1, 0, $query, $return);

  if(count($contact) == 1) {

    $contact_id = (int)$contact[0]['Id'];

    // Trigger automation, either with a tag (example Tag ID 123)
    // https://developer.infusionsoft.com/docs/read/Contact_Service#addToGroup
    $api->grpAssign($contact_id, 123);

    // or with an API Completion Goal (Integration: 'customFieldLookup', Call Name: 'codeLookup')
    // https://developer.infusionsoft.com/docs/read/Funnel_Service#achieveGoal
    $api->achieveGoal('customFieldLookup', 'codeLookup', $contact_id);

  } else {

    // Do something if no matching contact found. Perhaps a redirect?
    header('Location: http://example.com/redirect-path');
    exit();

  }