yansern/normalise-path.php

## normalise-path.php
<?php
/**
 * Normalise a file path string so that it can be checked safely.
 *
 * Attempt to avoid invalid encoding bugs by transcoding the path. Then
 * remove any unnecessary path components including '.', '..' and ''.
 *
 * @param $path string
 *     The path to normalise.
 * @param $encoding string
 *     The name of the path iconv() encoding.
 * @return string
 *    The path, normalised.
 */
function _normalise($path, $encoding="UTF-8") {

  // Attempt to avoid path encoding problems.
  $path = iconv($encoding, "$encoding//IGNORE//TRANSLIT", $path);

  // Process the components
  $parts = explode('/', $path);
  $safe = array();
  foreach ($parts as $idx => $part) {

    if (($i>0 && trim($part)=="") || $part=='.') {
      continue;
    } elseif ('..' == $part) {
      array_pop($safe);
      continue;
    } else {
      $safe[] = $part;
    }
  }

  // Return the "clean" path
  $path = implode(DIRECTORY_SEPARATOR, $safe);
  return $path;
}
	<?php
	/**
	* Normalise a file path string so that it can be checked safely.
	*
	* Attempt to avoid invalid encoding bugs by transcoding the path. Then
	* remove any unnecessary path components including '.', '..' and ''.
	*
	* @param $path string
	* The path to normalise.
	* @param $encoding string
	* The name of the path iconv() encoding.
	* @return string
	* The path, normalised.
	*/
	function _normalise($path, $encoding="UTF-8") {

	// Attempt to avoid path encoding problems.
	$path = iconv($encoding, "$encoding//IGNORE//TRANSLIT", $path);

	// Process the components
	$parts = explode('/', $path);
	$safe = array();
	foreach ($parts as $idx => $part) {

	if (($i>0 && trim($part)=="") \|\| $part=='.') {
	continue;
	} elseif ('..' == $part) {
	array_pop($safe);
	continue;
	} else {
	$safe[] = $part;
	}
	}

	// Return the "clean" path
	$path = implode(DIRECTORY_SEPARATOR, $safe);
	return $path;
	}