diff --git a/src/File/ExcludeExtension.php b/src/File/ExcludeExtension.php
index 0ac8d6e38..ea5b52746 100644
--- a/src/File/ExcludeExtension.php
+++ b/src/File/ExcludeExtension.php
@@ -59,7 +59,7 @@ public function isValid($value, $file = null)
 
         $extensions = $this->getExtension();
 
-        if ($this->getCase() and (!in_array($info['extension'], $extensions))) {
+        if ($this->getCase() && (!in_array($info['extension'], $extensions))) {
             return true;
         } elseif (!$this->getCase()) {
             $found = false;
diff --git a/src/File/ImageSize.php b/src/File/ImageSize.php
index 337b49dad..f701a1f4d 100644
--- a/src/File/ImageSize.php
+++ b/src/File/ImageSize.php
@@ -342,7 +342,7 @@ public function isValid($value, $file = null)
         ErrorHandler::stop();
         $this->setValue($file);
 
-        if (empty($size) or ($size[0] === 0) or ($size[1] === 0)) {
+        if (empty($size) || ($size[0] === 0) || ($size[1] === 0)) {
             return $this->throwError($file, self::NOT_DETECTED);
         }
 
@@ -352,7 +352,7 @@ public function isValid($value, $file = null)
             $this->throwError($file, self::WIDTH_TOO_SMALL);
         }
 
-        if (($this->getMaxWidth() !== null) and ($this->getMaxWidth() < $this->width)) {
+        if (($this->getMaxWidth() !== null) && ($this->getMaxWidth() < $this->width)) {
             $this->throwError($file, self::WIDTH_TOO_BIG);
         }
 
@@ -360,7 +360,7 @@ public function isValid($value, $file = null)
             $this->throwError($file, self::HEIGHT_TOO_SMALL);
         }
 
-        if (($this->getMaxHeight() !== null) and ($this->getMaxHeight() < $this->height)) {
+        if (($this->getMaxHeight() !== null) && ($this->getMaxHeight() < $this->height)) {
             $this->throwError($file, self::HEIGHT_TOO_BIG);
         }
 
diff --git a/src/File/NotExists.php b/src/File/NotExists.php
index ca40f46b8..73f6e1221 100644
--- a/src/File/NotExists.php
+++ b/src/File/NotExists.php
@@ -40,7 +40,7 @@ class NotExists extends Exists
     public function isValid($value, $file = null)
     {
         $directories = $this->getDirectory(true);
-        if (($file !== null) and (!empty($file['destination']))) {
+        if (($file !== null) && (!empty($file['destination']))) {
             $directories[] = $file['destination'];
         } elseif (!isset($file['name'])) {
             $file['name'] = $value;