private function determineExtension()
    {
        $ext = 'php';
        if (in_array($this->driverClass, $this->extensionToDriver)) {
            $map = array_flip($this->extensionToDriver);
            $ext = $map[$this->driverClass];
        }
        return $ext;
    }
private function determineExtension()
    {
        $ext = 'php';
        if (in_array($this->driverClass, $this->extensionToDriver)) {
            $map = array_flip($this->extensionToDriver);
            $ext = $map[$this->driverClass];
        }
        return $ext;
    }
private function determineExtension ( ) { $ ext = 'php' ; if ( in_array ( $ this -> driverClass , $ this -> extensionToDriver ) ) { $ map = array_flip ( $ this -> extensionToDriver ) ; $ ext = $ map [ $ this -> driverClass ] ; } return $ ext ; }
Determine the extension based on the driver class

If there is no driver class given it will default to .php

@return string
Determine the extension based on the driver class