PHP/File Directory/is writable

is_writable() tells you whether you can write to a file.

   <source lang="html4strict">

<? if ( is_writable( "data.txt" ) ) {

 print "data.txt is writable";

} ?>

 </source>
   
  

is_writeable

   <source lang="html4strict">

<?php $file_name="permissions.php"; if(is_writeable($file_name)) {

   echo ("The file $file_name is writeable.
");

} else {

   echo ("The file $file_name is not writeable.
");

} ?>

 </source>
   
  

Testing for write permission

   <source lang="html4strict">

$log_file = "/var/log/users.log"; if (is_writeable($log_file)) {

   $fh = fopen($log_file,"ab");
   fwrite($fh, $_SESSION["username"] . " at " . strftime("%c") . "\n");
   fclose($fh);

} else {

   print "Can"t write to log file.";

}

 </source>