diff --git a/include/class_listing.inc b/include/class_listing.inc
index e6fc0fcb85c11d30f0541eb40119293ee13b7f23..2a2276264a43f8bee0aad5cf00a13b4f20929f73 100644
--- a/include/class_listing.inc
+++ b/include/class_listing.inc
@@ -1110,16 +1110,13 @@ class listing
   /*!
    * \brief Filter link
    */
-  function filterLink()
+  function filterLink($row, $dn, $mask, ...$vals)
   {
-    $row    = func_get_arg(0);
     $pid    = $this->pid;
-    $dn     = func_get_arg(1);
-    $params = array(func_get_arg(2));
+    $params = array($mask);
 
     // Collect sprintf params
-    for ($i = 3;$i < func_num_args();$i++) {
-      $val = func_get_arg($i);
+    foreach ($vals as $val) {
       if (empty($val)) {
         continue;
       }
@@ -1138,7 +1135,7 @@ class listing
 
     $result = '&nbsp;';
     if (count($params) > 1) {
-      $trans  = call_user_func_array('sprintf', $params);
+      $trans  = sprintf(...$params);
       if ($trans != '') {
         return '<a href="?plug='.$_GET['plug'].'&amp;PID='.$pid.'&amp;act=listing_edit_'.$row.'" title="'.$dn.'">'.$trans.'</a>';
       }
diff --git a/include/class_template.inc b/include/class_template.inc
index 0aaa6b6d3e06afdfe0e4a68b3404ca9287b1bfb9..f5897d3d73d75615f8faa5f26e33d2a21096794b 100644
--- a/include/class_template.inc
+++ b/include/class_template.inc
@@ -276,7 +276,7 @@ class template
       $specialAttrs['caller'.strtoupper($attr)] = $ui->$attr;
     }
     $this->attrs = templateHandling::parseArray($this->attrs, $specialAttrs);
-    $this->tabObject->adapt_from_template($this->attrs, call_user_func_array('array_merge', $this->attributes));
+    $this->tabObject->adapt_from_template($this->attrs, array_merge(...$this->attributes));
 
     $this->applied = TRUE;
     return $this->tabObject;
diff --git a/include/class_templateHandling.inc b/include/class_templateHandling.inc
index d149e0e788ac6d3896713ab33c38f085a094fcde..0fed84fa239133dfd9f2d171663fcf552c5244b8 100644
--- a/include/class_templateHandling.inc
+++ b/include/class_templateHandling.inc
@@ -176,7 +176,7 @@ class templateHandling
         unset($attrs[$attr]);
       }
     }
-    $dependencies = array_unique(call_user_func_array('array_merge', $flatdepends));
+    $dependencies = array_unique(array_merge(...$flatdepends));
     foreach ($dependencies as $attr) {
       if (empty($flatdepends[$attr])) {
         $needed[] = $attr;
@@ -515,7 +515,7 @@ class templateHandling
         $depends[$key]
       );
     $array[]      = $depends[$key];
-    $cache[$key]  = array_unique(call_user_func_array('array_merge_recursive', $array));
+    $cache[$key]  = array_unique(array_merge_recursive(...$array));
     return $cache[$key];
   }
 
diff --git a/include/functions.inc b/include/functions.inc
index 0a025c0011db90b2243cd4fe716798ae126405ff..db0c03181c2e0f35782a569eba75326718b6ec5d 100644
--- a/include/functions.inc
+++ b/include/functions.inc
@@ -2512,9 +2512,8 @@ function mail_utf8($to, $from_user, $from_email, $subject, $message, $type = 'pl
 }
 
 /* Calls fopen, gives errors as an array if any, file handle if successful */
-function fopenWithErrorHandling()
+function fopenWithErrorHandling(...$args)
 {
-  $args   = func_get_args();
   $errors = array();
   set_error_handler(
     function ($errno, $errstr, $errfile, $errline, $errcontext) use (&$errors)
@@ -2522,7 +2521,7 @@ function fopenWithErrorHandling()
       $errors[] = $errstr;
     }
   );
-  $fh = @call_user_func_array('fopen', $args);
+  $fh = @fopen(...$args);
   restore_error_handler();
   if ($fh !== FALSE) {
     return $fh;
diff --git a/plugins/admin/acl/class_aclManagement.inc b/plugins/admin/acl/class_aclManagement.inc
index ce0b9656a1c4b4a1d8f3a6c27548eb096dc3d893..f9e5735cc4d2b8657dea4a8c0c2203adfafd034e 100644
--- a/plugins/admin/acl/class_aclManagement.inc
+++ b/plugins/admin/acl/class_aclManagement.inc
@@ -201,14 +201,13 @@ class aclManagement extends simpleManagement
     @DEBUG (DEBUG_TRACE, __LINE__, __FUNCTION__, __FILE__, $this->dn, 'Creating new ACL assignment');
   }
 
-  static function filterLabel($row, $dn, $pid = 0, $base = '')
+  static function filterLabel($row, $dn, $pid = 0, $base = '', ...$vals)
   {
     $ou = '';
     if ($dn == $base) {
       $ou = ' . ';
     } else {
-      for ($i = 4;$i < func_num_args();$i++) {
-        $val = func_get_arg($i);
+      foreach ($vals as $val) {
         if (empty($val)) {
           continue;
         }
diff --git a/plugins/admin/groups/class_roleGeneric.inc b/plugins/admin/groups/class_roleGeneric.inc
index fabbb6a60627ec97aa01b63b33b708619f4a6cac..9569ee633aeab43ad590951d6758d218c10d8082 100644
--- a/plugins/admin/groups/class_roleGeneric.inc
+++ b/plugins/admin/groups/class_roleGeneric.inc
@@ -32,7 +32,7 @@ class RoleMembersAttribute extends UsersAttribute
         if (empty($groups)) {
           $this->whitelistDns = array();
         } else {
-          $this->whitelistDns = call_user_func_array('array_merge_recursive', $groups)['member'];
+          $this->whitelistDns = array_merge_recursive(...$groups)['member'];
         }
       }
       return array(