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<?php

class SimplePie_Cache_File implements SimplePie_Cache_Base
{
    protected $location;
    protected $filename;
    protected $extension;
    protected $name;
    public function __construct($location, $name, $type)
    {
        $this->location = $location;
        $this->filename = $name;
        $this->extension = $type;
        $this->name = "{$this->location}/{$this->filename}.{$this->extension}";
    }
    public function save($data)
    {
        if (file_exists($this->name) && is_writable($this->name) || file_exists($this->location) && is_writable($this->location)) {
            if ($data instanceof SimplePie) {
                $data = $data->data;
            }
            $data = serialize($data);
            return (bool) file_put_contents($this->name, $data);
        }
        return false;
    }
    public function load()
    {
        if (file_exists($this->name) && is_readable($this->name)) {
            return unserialize(file_get_contents($this->name));
        }
        return false;
    }
    public function mtime()
    {
        return @filemtime($this->name);
    }
    public function touch()
    {
        return @touch($this->name);
    }
    public function unlink()
    {
        if (file_exists($this->name)) {
            return unlink($this->name);
        }
        return false;
    }
}