Paradox/Client.php
public function findWithin($type, $latitude, $longitude, $radius, $aql, $params = array(), $placeholder = "doc")
    {
        $reference = array('latitude' => $latitude, 'longitude' => $longitude);

        return $this->getToolbox($this->_currentConnection)->getFinder()->findWithin($type, $reference, $radius, $aql, $params, $placeholder);
    }
public function findWithin($type, $latitude, $longitude, $radius, $aql, $params = array(), $placeholder = "doc")
    {
        $reference = array('latitude' => $latitude, 'longitude' => $longitude);

        return $this->getToolbox($this->_currentConnection)->getFinder()->findWithin($type, $reference, $radius, $aql, $params, $placeholder);
    }
Find documents/edges/vertices within a radius around the reference point. If nothing is found, an empty array is returned.
By default, the placeholder is "doc", so your query could look something like: doc.age > 20 SORT doc.name LIMIT 10
@param  string $type        The collection to search in. For graphs, only "vertex" and "edge" are allowed.
@param  float  $latitude    The latitude in degrees.
@param  float  $longitude   The longitude in degrees.
@param  float  $radius      The radius in meters.
@param  string $aql         An AQL fragment that will be inserted after the FILTER keyword.
@param  array  $params      An optional associative array containing parameters to bind to the query.
@param  string $placeholder Set this to something else if you do not wish to use "doc" to refer to documents in your query.
@return array