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<?php function preg($zippostal) { if (preg_match("/^(F-)?((2[A|B])|[0-9]{2})[0-9]{3}$/", $zippostal)) { return "provided zip/postal code is not valid."; } else { return "provided zip/postal code is valid."; } } $zips = array( '10000', '22324', '24322', '88012', '98230', '12232', '34200', '78900', '01100' ); foreach ($zips as $zip) { echo preg($zip) . "\n"; }

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