diff --git a/phpseclib/Common/Functions/Strings.php b/phpseclib/Common/Functions/Strings.php
index dc869109..76ff62ff 100644
--- a/phpseclib/Common/Functions/Strings.php
+++ b/phpseclib/Common/Functions/Strings.php
@@ -165,13 +165,12 @@ abstract class Strings
     /**
      * Create SSH2-style string
      *
-     * @param mixed $input..
+     * @param $elements[]
      * @access public
      * @return mixed
      */
-    public static function packSSH2()
+    public static function packSSH2(...$elements)
     {
-        $elements = func_get_args();
         $format = $elements[0];
         array_shift($elements);
         if (strlen($format) != count($elements)) {
diff --git a/phpseclib/Crypt/Common/SymmetricKey.php b/phpseclib/Crypt/Common/SymmetricKey.php
index d6b22eeb..c3d2ee4d 100644
--- a/phpseclib/Crypt/Common/SymmetricKey.php
+++ b/phpseclib/Crypt/Common/SymmetricKey.php
@@ -650,12 +650,13 @@ abstract class SymmetricKey
      * @see Crypt/Hash.php
      * @param string $password
      * @param string $method
+     * @param $func_args[]
      * @throws \LengthException if pbkdf1 is being used and the derived key length exceeds the hash length
      * @return bool
      * @access public
      * @internal Could, but not must, extend by the child Crypt_* class
      */
-    public function setPassword($password, $method = 'pbkdf2')
+    public function setPassword($password, $method = 'pbkdf2', ...$func_args)
     {
         $key = '';
 
@@ -664,23 +665,21 @@ abstract class SymmetricKey
             case 'pkcs12': // from https://tools.ietf.org/html/rfc7292#appendix-B.2
             case 'pbkdf1':
             case 'pbkdf2':
-                $func_args = func_get_args();
-
                 // Hash function
-                $hash = isset($func_args[2]) ? strtolower($func_args[2]) : 'sha1';
+                $hash = isset($func_args[0]) ? strtolower($func_args[0]) : 'sha1';
                 $hashObj = new Hash();
                 $hashObj->setHash($hash);
 
                 // WPA and WPA2 use the SSID as the salt
-                $salt = isset($func_args[3]) ? $func_args[3] : $this->password_default_salt;
+                $salt = isset($func_args[1]) ? $func_args[1] : $this->password_default_salt;
 
                 // RFC2898#section-4.2 uses 1,000 iterations by default
                 // WPA and WPA2 use 4,096.
-                $count = isset($func_args[4]) ? $func_args[4] : 1000;
+                $count = isset($func_args[2]) ? $func_args[2] : 1000;
 
                 // Keylength
-                if (isset($func_args[5])) {
-                    $dkLen = $func_args[5];
+                if (isset($func_args[3])) {
+                    $dkLen = $func_args[3];
                 } else {
                     $key_length = $this->explicit_key_length !== false ? $this->explicit_key_length : $this->key_length;
                     $dkLen = $method == 'pbkdf1' ? 2 * $key_length : $key_length;
diff --git a/phpseclib/Crypt/DSA.php b/phpseclib/Crypt/DSA.php
index 44644308..7b8c0762 100644
--- a/phpseclib/Crypt/DSA.php
+++ b/phpseclib/Crypt/DSA.php
@@ -182,14 +182,14 @@ class DSA extends AsymmetricKey
      *  - 'privatekey': The private key.
      *  - 'publickey':  The public key.
      *
+     * @param $args[]
      * @access public
      * @return array|DSA
      */
-    static function createKey()
+    static function createKey(...$args)
     {
         self::initialize_static_variables();
 
-        $args = func_get_args();
         if (count($args) == 2 && is_int($args[0]) && is_int($args[1])) {
             $private = self::createParameters($args[0], $args[1]);
         } else if (count($args) == 1 && $args[0] instanceof DSA) {
diff --git a/phpseclib/File/X509.php b/phpseclib/File/X509.php
index 318fadc7..ed1dd893 100644
--- a/phpseclib/File/X509.php
+++ b/phpseclib/File/X509.php
@@ -3478,12 +3478,13 @@ class X509
     /**
      * Set the domain name's which the cert is to be valid for
      *
+     * @param $domains[]
      * @access public
      * @return array
      */
-    public function setDomain()
+    public function setDomain(...$domains)
     {
-        $this->domains = func_get_args();
+        $this->domains = $domains;
         $this->removeDNProp('id-at-commonName');
         $this->setDNProp('id-at-commonName', $this->domains[0]);
     }
@@ -3492,11 +3493,11 @@ class X509
      * Set the IP Addresses's which the cert is to be valid for
      *
      * @access public
-     * @param string $ipAddress optional
+     * @param $ipAddresses[] optional
      */
-    public function setIPAddress()
+    public function setIPAddress(...$ipAddresses)
     {
-        $this->ipAddresses = func_get_args();
+        $this->ipAddresses = $ipAddresses;
         /*
         if (!isset($this->domains)) {
             $this->removeDNProp('id-at-commonName');
diff --git a/phpseclib/Net/SFTP.php b/phpseclib/Net/SFTP.php
index a64f18e2..401a4ca6 100644
--- a/phpseclib/Net/SFTP.php
+++ b/phpseclib/Net/SFTP.php
@@ -398,15 +398,14 @@ class SFTP extends SSH2
      * Login
      *
      * @param string $username
-     * @param string $password
+     * @param $args[] string password
      * @throws \UnexpectedValueException on receipt of unexpected packets
      * @return bool
      * @access public
      */
-    public function login($username)
+    public function login($username, ...$args)
     {
-        $args = func_get_args();
-        if (!call_user_func_array([&$this, 'sublogin'], $args)) {
+        if (!$this->sublogin($username, ...$args)) {
             return false;
         }
 
@@ -1071,12 +1070,12 @@ class SFTP extends SSH2
      * $sftp->setListOrder();
      *    Don't do any sort of sorting
      *
+     * @param $args[]
      * @access public
      */
-    public function setListOrder()
+    public function setListOrder(...$args)
     {
         $this->sortOptions = [];
-        $args = func_get_args();
         if (empty($args)) {
             return;
         }
diff --git a/phpseclib/Net/SSH1.php b/phpseclib/Net/SSH1.php
index ef9a141a..ca296dc8 100644
--- a/phpseclib/Net/SSH1.php
+++ b/phpseclib/Net/SSH1.php
@@ -1359,12 +1359,11 @@ class SSH1
      * named constants from it, using the value as the name of the constant and the index as the value of the constant.
      * If any of the constants that would be defined already exists, none of the constants will be defined.
      *
-     * @param array $array
+     * @param $args[]
      * @access private
      */
-    private function define_array()
+    private function define_array(...$args)
     {
-        $args = func_get_args();
         foreach ($args as $arg) {
             foreach ($arg as $key => $value) {
                 if (!defined($value)) {
diff --git a/phpseclib/Net/SSH2.php b/phpseclib/Net/SSH2.php
index 90e7183f..3e9a3a6f 100644
--- a/phpseclib/Net/SSH2.php
+++ b/phpseclib/Net/SSH2.php
@@ -2098,29 +2098,26 @@ class SSH2
      * The $password parameter can be a plaintext password, a \phpseclib\Crypt\RSA object or an array
      *
      * @param string $username
-     * @param mixed $password
-     * @param mixed $...
+     * @param $args[] param mixed $password
      * @return bool
      * @see self::_login()
      * @access public
      */
-    public function login($username)
+    public function login($username, ...$args)
     {
-        $args = func_get_args();
-        return call_user_func_array([&$this, 'sublogin'], $args);
+        return $this->sublogin($username, ...$args);
     }
 
     /**
      * Login Helper
      *
      * @param string $username
-     * @param mixed $password
-     * @param mixed $...
+     * @param $args[] param mixed $password
      * @return bool
      * @see self::_login_helper()
      * @access private
      */
-    protected function sublogin($username)
+    protected function sublogin($username, ...$args)
     {
         if (!($this->bitmap & self::MASK_CONSTRUCTOR)) {
             if (!$this->connect()) {
@@ -2128,7 +2125,6 @@ class SSH2
             }
         }
 
-        $args = array_slice(func_get_args(), 1);
         if (empty($args)) {
             return $this->login_helper($username);
         }
@@ -2375,15 +2371,13 @@ class SSH2
     /**
      * Handle the keyboard-interactive requests / responses.
      *
-     * @param string $responses...
+     * @param $responses[]
      * @return bool
      * @throws \RuntimeException on connection error
      * @access private
      */
-    private function keyboard_interactive_process()
+    private function keyboard_interactive_process(...$responses)
     {
-        $responses = func_get_args();
-
         if (strlen($this->last_interactive_response)) {
             $response = $this->last_interactive_response;
         } else {
@@ -4058,12 +4052,11 @@ class SSH2
      * named constants from it, using the value as the name of the constant and the index as the value of the constant.
      * If any of the constants that would be defined already exists, none of the constants will be defined.
      *
-     * @param array $array
+     * @param $args[]
      * @access protected
      */
-    protected function define_array()
+    protected function define_array(...$args)
     {
-        $args = func_get_args();
         foreach ($args as $arg) {
             foreach ($arg as $key => $value) {
                 if (!defined($value)) {