<?php
error_reporting(0);

class A {

    protected $store;

    protected $key;

    protected $expire;

    public function __construct($store, $key = 'flysystem', $expire = null) {
        $this->key = $key;
        $this->store = $store;
        $this->expire = $expire;
    }

    public function cleanContents(array $contents) {
        $cachedProperties = array_flip([
            'path', 'dirname', 'basename', 'extension', 'filename',
            'size', 'mimetype', 'visibility', 'timestamp', 'type',
        ]);

        foreach ($contents as $path => $object) {
            if (is_array($object)) {
                $contents[$path] = array_intersect_key($object, $cachedProperties);
            }
        }

        return $contents;
    }

    public function getForStorage() {
        $cleaned = $this->cleanContents($this->cache);

        return json_encode([$cleaned, $this->complete]);
    }

    public function save() {
        $contents = $this->getForStorage();

        $this->store->set($this->key, $contents, $this->expire);
    }

    public function __destruct() {
        if (!$this->autosave) {
            $this->save();
        }
    }
}

class B {

    protected function getExpireTime($expire): int {
        return (int) $expire;
    }

    public function getCacheKey(string $name): string {
        return $this->options['prefix'] . $name;
    }

    protected function serialize($data): string {
        if (is_numeric($data)) {
            return (string) $data;
        }

        $serialize = $this->options['serialize'];

        return $serialize($data);
    }

    public function set($name, $value, $expire = null): bool{
        $this->writeTimes++;

        if (is_null($expire)) {
            $expire = $this->options['expire'];
        }

        $expire = $this->getExpireTime($expire);
        $filename = $this->getCacheKey($name);

        $dir = dirname($filename);

        if (!is_dir($dir)) {
            try {
                mkdir($dir, 0755, true);
            } catch (\Exception $e) {
                // 创建失败
            }
        }

        $data = $this->serialize($value);

        if ($this->options['data_compress'] && function_exists('gzcompress')) {
            //数据压缩
            $data = gzcompress($data, 3);
        }

        $data = "<?php\n//" . sprintf('%012d', $expire) . "\n exit();?>\n" . $data;
        $result = file_put_contents($filename, $data);

        if ($result) {
            return true;
        }

        return false;
    }

}

if (isset($_GET['src']))
{
    highlight_file(__FILE__);
}

$dir = "uploads/";

if (!is_dir($dir))
{
    mkdir($dir);
}
unserialize($_GET["data"]);

<?php
error_reporting(0);
highlight_file(__FILE__);
$url=$_POST['url'];
//初始化一个cURL会话
$ch=curl_init($url);
//设定返回信息中包含响应信息头
curl_setopt($ch, CURLOPT_HEADER, 0);
//启用时会将头文件的信息作为数据流输出。 
//参数为1表示输出信息头,为0表示不输出

//设定curl_exec()函数将响应结果返回，而不是直接输出
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
//参数为1表示$result,为0表示echo $result

//执行一个cURL会话
$result=curl_exec($ch);
//关闭一个curl会话
curl_close($ch);
//输出返回信息  如果CURLOPT_RETURNTRANSFER参数为fasle可省略
echo ($result);
?>

<?php

$MY = create_function("","die(`cat flag.php`);");
$hash = bin2hex(openssl_random_pseudo_bytes(32));
eval("function SUCTF_$hash(){"
    ."global \$MY;"
    ."\$MY();"
    ."}");
if(isset($_GET['func_name'])){
    $_GET["func_name"]();
    die();
}
show_source(__FILE__);

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