src/WebApp/Context/Output.php
public static function addTo($key, $value)
  {
    if (isset(self::$vars[$key])) {
      self::$vars[$key] .= $value;
    } else {
      self::$vars[$key] = $value;
    }
  }
public static function addTo($key, $value)
  {
    if (isset(self::$vars[$key])) {
      self::$vars[$key] .= $value;
    } else {
      self::$vars[$key] = $value;
    }
  }
public static function addTo ( $ key , $ value ) { if ( isset ( self :: $ vars [ $ key ] ) ) { self :: $ vars [ $ key ] .= $ value ; } else { self :: $ vars [ $ key ] = $ value ; } }
Add content to an existing variable

@param string $key    Variable's name
@param string $value  Value to add
Add content to an existing variable