Programming Tutorials

<?php

  function write ($data, $file, $write_mode="w") {
    $lock = $file . ".lock";
     // run the write fix, to stop any clashes that may occur
    write_fix($lock);
     // create a new lock file after write_fix() for this writing session
    touch( $lock );
     // write to your file
    $open = fopen($file, $write_mode);
    fwrite($open, $data);
    fclose($open);
     // kill your current lock
    unlink($lock);
  }

  function write_fix ($lock_file) {
    while( file_exists($lock_file){
      // do something in here?
      // maybe sleep for a few microseconds
      // to maintain stability, if this is going to
      // take a while ?? [just a suggestion]
    }
  }

?>