Filename Checker Request

PHP Code:

<?php

function isValidFilename($file)
{
  return preg_match('/^([-\.\w]+)$/', $file) > 0;
}

foreach (array("foo_bar.php", "file with space.txt", "~tilde.txt") as $file)
{
  echo "Is name [$file] valid: ";
  var_dump(isValidFilename($file));
}

?>

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