same as previous commit

src/FilesProcessing.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace Differ\FilesProcessing;
+
+function makePathAbsolute(string $pathToFile)
+{
+    $realPath = realpath($pathToFile);
+    if ($realPath === false) {
+        $absolutePath =  __DIR__ . $pathToFile;
+    } else {
+        $absolutePath = $realPath;
+    }
+    return $absolutePath;
+}
+
+function getFilesContent(string $absolutePath)
+{
+    if (!file_exists($absolutePath)) {
+        throw new \Exception("File do not found: \"{$absolutePath}\"!");
+    } elseif (filesize($absolutePath) == 0) {
+        $pathBaseName = pathinfo($absolutePath, PATHINFO_BASENAME);
+        throw new \Exception("File \"{$pathBaseName}\" is empty.");
+    }
+    return file_get_contents($absolutePath, true);
+}