changes.md

    civicrm_api3('Contact', 'validate', array('action' => "create"));

    { "is_error": 0,
     "version": 3,
     "count": 1,
     "id": 0,
     "values": [
      {
        "contact_type":
           {
            "message": "Mandatory key(s) missing from params array: contact_type",
            "code": "mandatory_missing"
           }
       }
     ]
    }
$result = civicrm_api3('Contact', 'create', array(
  'contact_type' => 'Individual',
  'first_name' => 'First',
  'last_name' => 'Last',
  'nick_name' => 'Firstie',
  'options' => array(
    'reload' => 1,
  ),
));
// Create "Jeffrey Lebowski" with external ID "1234".
// If a contact already exists with external ID "1234", update it.
$result = civicrm_api3('contact', 'create', array(
  'contact_type' => 'Individual',
  'first_name' => 'Jeffrey',
  'last_name' => 'Lebowski',
  'nick_name' => 'The Dude',
  'external_identifier' => '1234',
  'options' => array(
    'match' => 'external_identifier',
  ),
));
// Update contact #123 and reconcile his email addresses with the given list.
//
// If the contact already has an email record for "one@example.com", it will
// be updated. (Extra metadata -- like on-hold status -- will be preserved.)
// If not, a new email record will be inserted.
//
// Similarly, an email record for "two@example.com" will be updated or
// inserted.
//
// Any other email records for contact #123 will be deleted.
$result = civicrm_api3('contact', 'create', array(
  'id' => 123,
  'api.Email.replace' => array(
    'values' => array(
      array('email' => 'one@example.com', 'location_type_id' => 1),
      array('email' => 'two@example.com', 'location_type_id' => 2),
    ),
    'options' => array('match' => 'email'),
  ),
));
cj().crmAPI('Entity', 'action', {...params...}, {
  callBack: function(data) { ... }
});
CRM.api('Entity', 'action', {...params...}, {
  success: function(data) { ... }
});
try {
  civicrm_api3('contact', 'get', array());
  civicrm_api3('contribution', 'sendconfirmation', array('id' => 100));
}
catch (CiviCRM_API3_Exception $e) {
  $error = $e->getMessage();
}
civicrm_api3('MailingComponent','get',array('is_active' =>  NULL));
$result = civicrm_api3('dashboard', 'create', array(
  'label' => 'New Dashlet element',
  'name' => 'New Dashlet element',
  'url' => 'civicrm/report/list&reset=1&compid=99&snippet=5',
  'fullscreen_url' => 'civicrm/report/list&compid=99&reset=1&snippet=5&context=dashletFullscreen',
));
$result = civicrm_api3('dashboard_contact', 'create', array(
  'contact_id' => $contact['id'],
  'dashboard_id' => $dashresult['id'],
  'is_active' => 1,
));
$activityContacts = CRM_Core_OptionGroup::values('activity_contacts', FALSE, FALSE, FALSE, NULL, 'name');
$assigneeID = CRM_Utils_Array::key('Activity Assignees', $activityContacts);
$targetID = CRM_Utils_Array::key('Activity Targets', $activityContacts);
$scheduledStatus = CRM_Core_OptionGroup::getValue('activity_status', 'Scheduled', 'name');
$mappingId = CRM_Core_DAO::getFieldValue('CRM_Core_DAO_ActionMapping', 'activity_type', 'id', 'entity_value');
$activityTypeId = CRM_Core_OptionGroup::getValue('activity_type', "Meeting", 'name');
$result = civicrm_api3('dashboard', 'create', array(
  'title' => "simpleActionSchedule",
  'recipient' => $assigneeID,
  'limit_to' => 1,
  'entity_value' => $activityTypeId,
  'entity_status' => $scheduledStatus,
  'is_active' => 1,
  'record_activity' => 1,
  'mapping_id' => $mappingId,
));
function all($offset = 0, $rowcount = 0, $sort = NULL,$includeContactIDs = FALSE, $justIDs = FALSE)
// Old/Deprecated/Verbose. Compatible with v4.1+.
$civicrm_setting['Search Preferences']['search_autocomplete_count'] = 10;
$civicrm_setting['CiviCRM Preferences']['remote_profile_submissions'] = FALSE;

// New/Preferred/Simplified. Compatible with v4.7+.
$civicrm_setting['domain']['search_autocomplete_count'] = 10;
$civicrm_setting['domain']['remote_profile_submissions'] = FALSE;
// Ex: Compatible with v4.6 or older (minimalist)
function example_hook() {
  global $civicrm_setting;
  $civicrm_setting['Search Preferences']['search_autocomplete_count'] = 10;
}

// Ex: Compatible with v4.7 or newer (minimalist)
function example_hook() {
  global $civicrm_setting;
  $civicrm_setting['domain']['search_autocomplete_count'] = 10;
  Civi::service('settings_manager')->useMandatory();
}

// Ex: Compatible with both v4.6 and v4.7
function example_hook() {
  global $civicrm_setting;
  $civicrm_setting['Search Preferences']['search_autocomplete_count'] = 10;
  if (version_compare('>=', CRM_Utils_System::version(), '4.7.alpha1')) {
    Civi::service('settings_manager')->useMandatory();
  }
}