title: How to open textfile and write to it append-style with php?
body: <p>How do you open a textfile and write to it with php appendstyle</p>
  
  <pre><code>    textFile.txt
  
          //caught these variables
          $var1 = $_POST['string1'];
          $var2 = $_POST['string2'];
          $var3 = $_POST['string3'];
  
      $handle = fopen("textFile.txt", "w");
      fwrite = ("%s %s %s\n", $var1, $var2, $var3, handle);//not the way to append to textfile
  fclose($handle);
  </code></pre>