src/Memory.php
protected function getRememberKey()
    {
        $backtrace = debug_backtrace(4)[2];
        $args = implode('_', $backtrace['args']);
        $key = str_replace('\\', '_', get_class($this).'_'.$backtrace['function'].'_'.$args);

        return $key;
    }
protected function getRememberKey()
    {
        $backtrace = debug_backtrace(4)[2];
        $args = implode('_', $backtrace['args']);
        $key = str_replace('\\', '_', get_class($this).'_'.$backtrace['function'].'_'.$args);

        return $key;
    }
protected function getRememberKey ( ) { $ backtrace = debug_backtrace ( 4 ) [ 2 ] ; $ args = implode ( '_' , $ backtrace [ 'args' ] ) ; $ key = str_replace ( '\\' , '_' , get_class ( $ this ) . '_' . $ backtrace [ 'function' ] . '_' . $ args ) ; return $ key ; }
get the cache key.

@return string
get the cache key .