Fixed an issue that could occurr when checking files on network drive…

…s (ref #2965)

src/Files/LocalFile.php

@@ -30,7 +30,7 @@ class LocalFile extends File
     public function __construct($path, Ruleset $ruleset, Config $config)
     {
         $this->path = trim($path);
-        if (is_readable($this->path) === false) {
+        if (Common::isReadable($this->path) === false) {
             parent::__construct($this->path, $ruleset, $config);
             $error = 'Error opening file; file no longer exists or you do not have access to read the file';
             $this->addMessage(true, $error, 1, 1, 'Internal.LocalFile', [], 5, false);

src/Util/Common.php

@@ -55,6 +55,34 @@ public static function isPharFile($path)
     }//end isPharFile()
 
 
+    /**
+     * Checks if a file is readable.
+     *
+     * Addresses PHP bug related to reading files from network drives on Windows.
+     * e.g. when using WSL2.
+     *
+     * @param string $path The path to the file.
+     *
+     * @return boolean
+     */
+    public static function isReadable($path)
+    {
+        if (is_readable($path) === true) {
+            return true;
+        }
+
+        if (file_exists($path) === true && is_file($path) === true) {
+            $f = @fopen($path, 'rb');
+            if (fclose($f) === true) {
+                return true;
+            }
+        }
+
+        return false;
+
+    }//end isReadable()
+
+
     /**
      * CodeSniffer alternative for realpath.
      *