$num = 42; $length = 5; $zero_padded = str_pad($num, $length, "0", STR_PAD_LEFT); echo $zero_padded; // Outputs "00042"
$date = "2020-4-5"; $parts = explode("-", $date); $year = $parts[0]; $month = str_pad($parts[1], 2, "0", STR_PAD_LEFT); $day = str_pad($parts[2], 2, "0", STR_PAD_LEFT); $formatted_date = "{$year}-{$month}-{$day}"; echo $formatted_date; // Outputs "2020-04-05"The pad_zero module appears to be part of the core PHP libraries and does not require any additional package installation.