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After
if ($store) {

insert
$file['name'] = removeSpacesFromFileNames($file['name']);

at the bottom befor the ?> insert

function removeSpacesFromFileNames($imageName){
$patternCounter=0;
$patterns[$patternCounter] = '/[\x20-\x2d]/u'; // remove range of shifted characters on keyboard - !"#$%&'()*+,-
$patternCounter++;

$patterns[$patternCounter] = '/[\x5b-\x60]/u'; // remove range including brackets - []\^_`
$patternCounter++;

$patterns[$patternCounter] = '/[\x7b-\xff]/u'; // remove all characters above the letter z.  This will eliminate some non-English language letters
$patternCounter++;

$replacement ="_";

return preg_replace($patterns, $replacement, $imageName);
}