public function find_all() {
        $this->ensure_path_exists();
        $files = glob($this->glob_keys_pattern(), GLOB_MARK | GLOB_NOSORT);
        $return = array();
        if ($files === false) {
            return $return;
        }
        foreach ($files as $file) {
            $return[] = substr(basename($file), 0, -6);
        }
        return $return;
    }
public function find_all() {
        $this->ensure_path_exists();
        $files = glob($this->glob_keys_pattern(), GLOB_MARK | GLOB_NOSORT);
        $return = array();
        if ($files === false) {
            return $return;
        }
        foreach ($files as $file) {
            $return[] = substr(basename($file), 0, -6);
        }
        return $return;
    }
public function find_all ( ) { $ this -> ensure_path_exists ( ) ; $ files = glob ( $ this -> glob_keys_pattern ( ) , GLOB_MARK | GLOB_NOSORT ) ; $ return = array ( ) ; if ( $ files === false ) { return $ return ; } foreach ( $ files as $ file ) { $ return [ ] = substr ( basename ( $ file ) , 0 , - 6 ) ; } return $ return ; }
Finds all of the keys being used by this cache store instance.

@return array
Finds all of the keys being used by this cache store instance .