--TEST-- Test gmdate() function : usage variation - Passing numeric representation of day formats. --FILE-- 'd', 'Day without leading zeros' => 'j', 'ISO representation' => 'N', 'Numeric representation of day' => 'w', 'Day of the year' => 'z' ); // loop through each element of the array for timestamp foreach($inputs as $key =>$value) { echo "\n--$key--\n"; var_dump( gmdate($value) ); var_dump( gmdate($value, $timestamp) ); }; ?> --EXPECTF-- *** Testing gmdate() : usage variation *** --Day with leading zeros-- string(%d) "%d" string(2) "08" --Day without leading zeros-- string(%d) "%d" string(1) "8" --ISO representation-- string(%d) "%d" string(1) "5" --Numeric representation of day-- string(%d) "%d" string(1) "5" --Day of the year-- string(%d) "%d" string(3) "220"