PHP
From Blue-IT.org Wiki
Test, if a file can be written to directory
<?php
$handle = fopen("/tmp/test.txt", "x");
if ($handle) echo "Success!";
else print_r(error_get_last());
?>
<?php
$handle = fopen("/tmp/test.txt", "x");
if ($handle) echo "Success!";
else print_r(error_get_last());
?>