title: PHP Create a .txt file with date as a filename
body: <p>Is it possible to use date as a filename when creating/opening one with fopen?
  I have a form that writes user data to txt file, but I would like that everytime user submits info, new txt file is generated with date in file name. </p>
  
  <p>Here is my try </p>
  
  <pre><code>$myfile='/home/myaccount/public_html/test/tiog/'.date('m-d-Y_hia').'.txt';
  $fh = fopen($myFile, 'w') or die("can't open file");
  fwrite($fh, $upisufajl);
  fclose($fh);
  </code></pre>
  
  <p>Error I'm getting is</p>
  
  <pre><code>Warning: fopen() [function.fopen]: Filename cannot be empty in /home/...
  </code></pre>
  
  <p>And how could I encode it in UTF8, so that it supports special characters (čćšđž)?</p>
  
  <p>Thanks</p>