private function classExists($fqcn)
    {
        if (isset($this->classExists[$fqcn])) {
            return $this->classExists[$fqcn];
        }

        // final check, does this class exist?
        return $this->classExists[$fqcn] = class_exists($fqcn);
    }
private function classExists($fqcn)
    {
        if (isset($this->classExists[$fqcn])) {
            return $this->classExists[$fqcn];
        }

        // final check, does this class exist?
        return $this->classExists[$fqcn] = class_exists($fqcn);
    }
private function classExists ( $ fqcn ) { if ( isset ( $ this -> classExists [ $ fqcn ] ) ) { return $ this -> classExists [ $ fqcn ] ; } // final check, does this class exist? return $ this -> classExists [ $ fqcn ] = class_exists ( $ fqcn ) ; }
Attempts to check if a class exists or not. This always uses PHP autoloading mechanism.

@param string $fqcn

@return boolean
Attempts to check if a class exists or not . This always uses PHP autoloading mechanism .