SafeStorage.php

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<?php
 
namespace League\Flysystem;
 
final class SafeStorage
{
    private $hash;
 
    protected static $safeStorage = [];
 
    public function __construct()
    {
        $this->hash = spl_object_hash($this);
        static::$safeStorage[$this->hash] = [];
    }
 
    public function storeSafely($key, $value)
    {
        static::$safeStorage[$this->hash][$key] = $value;
    }
 
    public function retrieveSafely($key)
    {
        if (array_key_exists($key, static::$safeStorage[$this->hash])) {
            return static::$safeStorage[$this->hash][$key];
        }
    }
 
    public function __destruct()
    {
        unset(static::$safeStorage[$this->hash]);
    }
}