Works on files encryption

htdocs/lib/files.lib.php

@@ -301,5 +301,69 @@ function dol_is_file($pathoffile)
 	$newpathoffile=dol_osencode($pathoffile);
 	return is_file($newpathoffile);
 }
+/**
+ * Reading or writing to a text file
+ * 
+ * @param	$file		File to open or create
+ * @param	$mode		Mode to open file : r = returns the text of a file, or returns FALSE if the file isn't found
+ * 											w = creates or overrides a file with the text
+ * 											r+ = reads a text file, then writes the text to the end of the file
+ * @param	$input		String of text
+ * @return	boolean		True if ok, false if error
+ */
+function dol_openfile($file, $mode, $input)
+{
+	if ($mode == "r")
+	{
+        if (file_exists($file))
+        {
+            $handle = fopen($file, "r");
+            $output = fread($handle, filesize($file));
+            return $output; // output file text
+        }
+        else
+        {
+            return false; // failed.
+        }
+    }
+    elseif ($mode == "w")
+    {
+        $handle = fopen($file, "w");
+        if (!fwrite($handle, $input))
+        {
+            return false; // failed.
+        }
+        else
+        {
+            return true; //success.
+        }
+    }
+    elseif ($mode == "r+")
+    {       
+        if (file_exists($file) && isset($input))
+        {
+            $handle = fopen($file, "r+");
+            $read = fread($handle, filesize($file));
+            $data = $read.$input;
+            if (!fwrite($handle, $data))
+            {
+                return false; // failed.
+            }
+            else
+            {
+                return true; // success.
+            }
+        }
+        else
+        {
+            return false; // failed.
+        }
+    }
+    else
+    {
+        return false; // failed.
+    }
+    fclose($handle);
+}
 
 ?>