PHP/File Directory/touch

Changing file modification times

   <source lang="html4strict">

<?php touch("shemp.php"); // set modification time to now touch("joe.php",$timestamp); // set modification time to $timestamp ?>

 </source>
   
  

Error-prone file locking

   <source lang="html4strict">

<? $locked = 0; while (! $locked) {

   if (! file_exists("guestbook.txt.lock")) {
       touch("guestbook.txt.lock");
       $locked = 1;
   } else {
       sleep(1);
   }

} ?>

 </source>
   
  

If a file does not yet exist, you can create one with the touch() function.

   <source lang="html4strict">

<? touch("myfile.txt"); ?>

 </source>