src/Store.php
protected function exists($key)
    {
        if ($this->enabled && opcache_is_script_cached($this->filePath($key))) {
            return true;
        }
        return file_exists($this->filePath($key));
    }
protected function exists($key)
    {
        if ($this->enabled && opcache_is_script_cached($this->filePath($key))) {
            return true;
        }
        return file_exists($this->filePath($key));
    }
protected function exists ( $ key ) { if ( $ this -> enabled && opcache_is_script_cached ( $ this -> filePath ( $ key ) ) ) { return true ; } return file_exists ( $ this -> filePath ( $ key ) ) ; }
Determines whether the key exists within the cache.

@param string $key
@return bool
Determines whether the key exists within the cache .