static function toBoolean ($v)
  {
    return is_string ($v) ? get (self::$BOOLEAN_VALUES, $v, false) : boolval ($v);
  }
static function toBoolean ($v)
  {
    return is_string ($v) ? get (self::$BOOLEAN_VALUES, $v, false) : boolval ($v);
  }
static function toBoolean ( $ v ) { return is_string ( $ v ) ? get ( self :: $ BOOLEAN_VALUES , $ v , false ) : boolval ( $ v ) ; }
Converts a boolean textual representation into a true boolean value.

@param string $v
@return bool
Converts a boolean textual representation into a true boolean value .