issue with filtering floats in rethinkdb on php driver output

temp.php

```php
<?php
object(r\Filter)#65 (2) {
  ["positionalArgs":"r\Query":private]=>
  array(2) {
    [0]=>
    object(r\Table)#67 (2) {
      ["positionalArgs":"r\Query":private]=>
      array(1) {
        [0]=>
        object(r\StringDatum)#66 (3) {
          ["value":"r\Datum":private]=>
          string(7) "testing"
          ["positionalArgs":"r\Query":private]=>
          array(0) {
          }
          ["optionalArgs":"r\Query":private]=>
          array(0) {
          }
        }
      }
      ["optionalArgs":"r\Query":private]=>
      array(0) {
      }
    }
    [1]=>
    object(r\ObjectDatum)#62 (3) {
      ["value":"r\Datum":private]=>
      array(2) {
        ["key_hash"]=>
        object(r\StringDatum)#64 (3) {
          ["value":"r\Datum":private]=>
          string(128) "09c067b604dd47ce97b5aa681106ba6f5c63dafc38f9949dcd1f205f05617daaf0891128de81542306864d1965e83c72a1dc56eb3b8dbc0319d4c8ef96d5d802"
          ["positionalArgs":"r\Query":private]=>
          array(0) {
          }
          ["optionalArgs":"r\Query":private]=>
          array(0) {
          }
        }
        ["ts"]=>
        object(r\NumberDatum)#63 (3) {
          ["value":"r\Datum":private]=>
          float(1387366784.1882)
          ["positionalArgs":"r\Query":private]=>
          array(0) {
          }
          ["optionalArgs":"r\Query":private]=>
          array(0) {
          }
        }
      }
      ["positionalArgs":"r\Query":private]=>
      array(0) {
      }
      ["optionalArgs":"r\Query":private]=>
      array(0) {
      }
    }
  }
  ["optionalArgs":"r\Query":private]=>
  array(0) {
  }
}
```