diff --git a/framework/captcha/Captcha.php b/framework/captcha/Captcha.php
index 3f3bffb..b85843f 100644
--- a/framework/captcha/Captcha.php
+++ b/framework/captcha/Captcha.php
@@ -107,9 +107,9 @@ class Captcha extends InputWidget
         $input = $this->renderInputHtml('text');
         $route = $this->captchaAction;
         if (is_array($route)) {
-            $route['v'] = uniqid();
+            $route['v'] = uniqid('', true);
         } else {
-            $route = [$route, 'v' => uniqid()];
+            $route = [$route, 'v' => uniqid('', true)];
         }
         $image = Html::img($route, $this->imageOptions);
         echo strtr($this->template, [
diff --git a/framework/captcha/CaptchaAction.php b/framework/captcha/CaptchaAction.php
index b7a7c95..a1aebb8 100644
--- a/framework/captcha/CaptchaAction.php
+++ b/framework/captcha/CaptchaAction.php
@@ -132,7 +132,7 @@ class CaptchaAction extends Action
                 'hash2' => $this->generateValidationHash(strtolower($code)),
                 // we add a random 'v' parameter so that FireFox can refresh the image
                 // when src attribute of image tag is changed
-                'url' => Url::to([$this->id, 'v' => uniqid()]),
+                'url' => Url::to([$this->id, 'v' => uniqid('', true)]),
             ];
         }
 
diff --git a/framework/console/controllers/AssetController.php b/framework/console/controllers/AssetController.php
index 9d88d9f..187cdfd 100644
--- a/framework/console/controllers/AssetController.php
+++ b/framework/console/controllers/AssetController.php
@@ -484,7 +484,7 @@ class AssetController extends Controller
             }
         }
         $array = VarDumper::export($array);
-        $version = date('Y-m-d H:i:s', time());
+        $version = date('Y-m-d H:i:s');
         $bundleFileContent = <<<EOD
 <?php
 /**
diff --git a/framework/helpers/BaseConsole.php b/framework/helpers/BaseConsole.php
index 38fa955..0d19584 100644
--- a/framework/helpers/BaseConsole.php
+++ b/framework/helpers/BaseConsole.php
@@ -622,7 +622,7 @@ class BaseConsole
         if (static::isRunningOnWindows()) {
             $output = [];
             exec('mode con', $output);
-            if (isset($output, $output[1]) && strpos($output[1], 'CON') !== false) {
+            if (isset($output[1]) && strpos($output[1], 'CON') !== false) {
                 return $size = [(int) preg_replace('~\D~', '', $output[4]), (int) preg_replace('~\D~', '', $output[3])];
             }
         } else {
diff --git a/framework/views/errorHandler/error.php b/framework/views/errorHandler/error.php
index dc88e6b..9ef6dc7 100644
--- a/framework/views/errorHandler/error.php
+++ b/framework/views/errorHandler/error.php
@@ -78,7 +78,7 @@ if (method_exists($this, 'beginPage')) {
         Please contact us if you think this is a server error. Thank you.
     </p>
     <div class="version">
-        <?= date('Y-m-d H:i:s', time()) ?>
+        <?= date('Y-m-d H:i:s') ?>
     </div>
     <?php if (method_exists($this, 'endBody')): ?>
         <?php $this->endBody() // to allow injecting code into body (mostly by Yii Debug Toolbar)?>
diff --git a/framework/web/MultipartFormDataParser.php b/framework/web/MultipartFormDataParser.php
index 89ebf0a..1dc6b31 100644
--- a/framework/web/MultipartFormDataParser.php
+++ b/framework/web/MultipartFormDataParser.php
@@ -219,7 +219,7 @@ class MultipartFormDataParser extends BaseObject implements RequestParserInterfa
         $headers = [];
         $headerParts = preg_split('/\\R/s', $headerContent, -1, PREG_SPLIT_NO_EMPTY);
         foreach ($headerParts as $headerPart) {
-            if (($separatorPos = strpos($headerPart, ':')) === false) {
+            if (strpos($headerPart, ':') === false) {
                 continue;
             }