First Draft

First Draft of the Example Files

7/12.php

@@ -0,0 +1,14 @@
+<?php
+  $fh = fopen("testfile.txt", 'r+') or die("Failed to open file");
+  $text = fgets($fh);
+
+  if (flock($fh, LOCK_EX))
+  {
+    fseek($fh, 0, SEEK_END);
+    fwrite($fh, "$text") or die("Could not write to file");
+    flock($fh, LOCK_UN);
+  }
+
+  fclose($fh);
+  echo "File 'testfile.txt' successfully updated";
+?>