--TEST-- Test strftime() function : usage variation - Passing date related format strings to format argument. --FILE-- "%y", 'Year as decimal number including the century' => "%Y", 'Time zone offset' => "%Z", 'Time zone offset' => "%z", ); // loop through each element of the array for timestamp foreach($inputs as $key =>$value) { echo "\n--$key--\n"; var_dump( strftime($value) ); var_dump( strftime($value, $timestamp) ); }; ?> --EXPECTF-- *** Testing strftime() : usage variation *** --Year as decimal number without a century-- string(%d) "%d" string(2) "08" --Year as decimal number including the century-- string(%d) "%d" string(4) "2008" --Time zone offset-- string(%d) "%s" string(%d) "%s"