Warning: array_shift() expects parameter 1 to be array, null given in /home/marshalltowncsd/sites/marshalltown.k12.ia.us/releases/20230829083101/web/app/plugins/ewww-image-optimizer/vendor/lsolesen/pel/examples/dirsort 2.php on line 43
Usage: [-d] ... Optional arguments: -d turn debug output on. Mandatory arguments: file ... one or more file names.